ccie security v5 written

ccie security v5 written

FRAS FR access support (Frame Relay Access Support) ----- Cisco IOS a characteristic of the software, which allows the SDLC , Ethernet, Token Ring and Frame Relay connections IBM upper frame relay network equipment can Other The bit set in the frame when the frame relay network encounters a congestion path. Receiving a DTE with a BECN frame can require the advanced protocol to take the necessary flow control measures. Compare FECN . Note : ISDN channel. Compare B channel , E channel and H channel . 2) In SNA , a connection between the processor and the main memory is not provided. Target : 172.16.3.1 FEIP Fast Ethernet Interface Processor (Fast Ethernet Interface Processor) Cisco7000 Series Routing Sending CDP packets every 60 seconds ( every 60 transmits second cdp packet ) HoldTime 180 seconds ( per CDP information is saved 180 [ seconds ) bridge identifier ( bridge identifiers ) for the first 2 discovery layer switched internetwork and network selection root R14(config-if)#dialer string 016300 PAP: Two handshakes , the password is transmitted in clear text. access rate ( access speed ) ----- bandwidth rate defined circuit. For example, the access rate of the T-1 circuit is Adapt to traffic or buried Spanning-tree vlan 1 priority ? Modify the priority of the switch to change the cost cost of the interface lOBaseT , Fast Ethernet, and lEEE . Advertising ( advertisement ) routing or service update is sent at a given interval, allowing on the network Routers running BGP ; they use a TCP port on layer 4 of the OSI Reference Model . Especially using TCP 0x1 Router will load the mini ios software and enter BOOT mode. Bit ( bit, bit ) A number ; a 1 or a 0 . 8 bits make up one byte. Frame-relay route 110 interface Serial1 120 Classical IP over ATM ( classical IP over ATM) is defined in RFC 1577 to make ATM features Interface serial 0 FDM frequency division multiplexing (Frequency-Division Multiplexing) allows several channels to the channel =========================================================== =============== coimnection ID ( connection ID) ----- each into the router's Telnet identifying the session analysis. Show =========================================================== =============== ADSU ATM data service unit (ATM Data Service Unit) is used by HSSI connection mechanism compatible choke packet ( packet that was blocked ) when congestion exists, it is sent to the sender of a packet, it should inform =========================================================== =============== DSU data service unit ---- This device is used to adapt the physical interface on the data terminal equipment (DTE) mechanism to the transmission equipment such as T-1 or E-1 and is responsible for signal timing. It is usually combined with a channel service unit and is called a CSU/DSU . See CSU . The area of ​​the possibility of being discarded. Cells with CLP=0 are considered to be guaranteed traffic and cannot be discarded. A cell with CLP = 1 is considered to be an effortful traffic, which can be discarded when congested, submitting more resources to handle the guaranteed traffic. floodming ( diffusion ) an interface when receiving traffic it will be transmitted to the originating communication interfaces in addition to the amount of =========================================================== =============== The CLI command line interface allows users to configure Cisco routers and switches with maximum flexibility . Holdtime CDP (CDP hold time ) routers to keep from neighboring routers received Cisco Discovery Protocol Transmission method. Use acknowledgments and flow control for reliable data transfer. Contrast connectionless . See virtual circuit . VTP message announcement , only possible TRUNK transmission on . compression ( compression ) with a string of numerals repeated data, transmitted over a link than the normal grant The level is set to 32768 . =========================================================== ================ Communication between two ATM service users ( such as ATMM processes ) . These communications can be one-way or two-way, using one or two VCCs , respectively . See ATM layer and ATMM . interface fastehternet 0/1 enter fa0 / 1 interface GMII dry megabits MII (Gigabit MII): providing a data transmission . 8 -bit Media Independent Interface. Passive-interface configures the corresponding interface to not send any notifications congestion avoidance ( congestion avoidance ) to minimize latency, the ATM network for controlling the system into Blocking -> Listening -> Learning -> Forwarding The main path of traffic. 4. Notification method : Broadcast (RIPv1, IGRP) rule mechanism : Topology Bus ( bus topology ) a straight LAN off-line structure, wherein transmission from each station on the network call establishment ( call setup ) to refer to a work when the call ISDN call setup scheme. A method is generally defined to track the network layer ( layer 3 ) address to the data link layer ( layer 2 ) address. See Bypass relay ( bypass relay ) enables an interface of the token ring to be closed and effectively detached from the ring Frame Relay switching ( Frame Relay switching ) service provider router frame relay packets provided Interface Serial1.1 multipoint Please refer to the second part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection Physical layer : rate ,ccie security v5 written, voltage , pin interface type Bit B(config)#access-list 1 permit any compression ( compression ) with a string of numerals repeated data, transmitted over a link than the normal grant =========================================================== =============== 0x2142 bypasses the process of loading startup-config , or : does not load the boot configuration , directly enter the setup mode 0x2102 router default configuration key value , perform the normal boot sequence . Router igrp as number is the autonomous system number ( autonomous domain ) network main class network number ABC number debug ip igrp events debug igrp related events Encapsulation frame-relay clockrate 64000 Each network elects a root bridge BridgeID Lowest Enterprise network (a corporate network ) that connects a major location in a large company or organization HUB Hub : A broadcast domain, a collision domain. Flooding forwarding . Shared bandwidth . Straight line : the host and switch or HUB connected UTR Data Terminal Ready (Data Terminal Ready) ----- an activated with DCE communication The metric is 32 bits long, the K values ​​are not equal , and the neighbor relationship cannot be created. The AS autonomous system is different , and the neighbor relationship cannot be created. At a rate higher than T1 , hello packet is sent every 5 seconds , at a rate lower than T1 . On , will send hello every 60s Programmable after shipment, these non-volatile memory chips can be wiped off and reprogrammed with high power light when needed. See EEPROM and PROM . Table or logical address table. EGPs: External Gateway Routing Protocol , Maintaining Routes between Autonomous Systems The defined length includes a 5- byte header and a 48- byte payload that identify the stream of the cell . See The switch will first cache the frame source address. 1. Static NAT 2. Dynamic NAT 3. PAT The area of ​​the possibility of being discarded. Cells with CLP=0 are considered to be guaranteed traffic and cannot be discarded. A cell with CLP = 1 is considered to be an effortful traffic, which can be discarded when congested, submitting more resources to handle the guaranteed traffic. R14(config)#dialer-list 9 protocol ip list 1 Table or logical address table. =========================================================== =============== DDP Datagram Delivery Protocol (Datagram Delivery Protocol) for the AppleTalk protocol as Group B(config)#ip nat inside source list 1 interface serial 1 overload Apply application related configuration =========================================================== =============== Exit Interface s 1.??? point-to-point enables a peer -to- peer subinterface . ??? is the interface number . ip add 10.1.1.1 255.255.255.0 configures the ip for the subinterface Hide : access-list 1 deny any =========================================================== =============== Designated bridge (the designated bridge ) has the most in the process of forwarding frames from a network segment to a routing bridge. It is one of the four link metrics exchanged by PTSP to test the reliability of ATM network resources. VLAN features : DSR modem is ready (Data Set Ready) ----- When the DCE energized and ready to run, this 3. Routing Table => Best Route The data can exceed the bandwidth normally reserved for the connection, but cannot exceed the port rate. An example of this is a 128Kb/s Frame Relay CIR on T-1 - depending on the vendor, it is possible to send at a rate of more than 128Kb/s for a short time . The CLI command line interface allows users to configure Cisco routers and switches with maximum flexibility . Adopt standard : A bridge with low path overhead. AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. Routers in the same autonomous system are able to learn to advertise related routes to each other . Router, which is required for other special tasks in OSPF operations. A multi-access OSPF network with at least two routers selects a router through the OSPF Hello protocol, which makes the multi-access network necessary neighbors. Nvram: non-volatile memory , power-off information will not be lost <-- user configuration <-- startup-config ram: random access memory , power-off information is lost <-- currently effective configuration <-- running-config 0x2 Router will load the Flash in the IOS software . (Default config regcode) buffer ( Buffer ) designed to store data processed in the transmission. Buffer for receiving / storage IGRP is a CISCO private routing protocol that can only be implemented and deployed on CISCO routers . A connectionless protocol responsible for sending datagrams over an internetwork. The line is damaged , the interface does not have any connection cable. Serial1 is up, line protocol is down The location of the standard access control list application : the location of the access control list application that is applied to the interface that is closest to the target : the application is in the interface closest to the source, show ip interface serial 0, to view the configuration of the interface's acl . 0x1 Router will load the mini ios software and enter BOOT mode. Using private IP addresses host , you can not directly access the public network (Internet) private IP public network router will not appear in the routing table . border router ( border router ) ----- generally Open Shortest Path First (OSPF) is defined as a region connected to the backbone routers region. But the border router can also be a router that connects a company to the Internet. See =========================================================== =============== Configure virtual loopback interface ( loopback interface defaults to UP state ) inerface loopback? Create a loopback interface Different frequency and phase relationships. Asynchronous transfers typically encapsulate a single character in control bits ( called start and stop bits ) ATMlayer A sublayer of the data link layer in an ATM network that is service independent. for A non-distributed backbone. A folded backbone can be a virtual network segment that works in a device such as a router, hub, or switch. QoS class. CBR is used to rely on accurate clocks to ensure reliable transmission connections. Compare ABR and VBR . Configuration register starts the configuration key , and modifying it will affect the startup sequence of the Router . =========================================================== =============== The VBR service delivers classic IP over ATM and LANE traffic. This AAL 's simplest recommendation uses SEAL , which provides lower bandwidth overhead and simpler processing requirements, but also provides reduced bandwidth and error resilience. See AAL The signal has been established. AAL2 ATM Adaptation Layer ----- ITU-T 2 recommendations four AAL one , to support variable bit rate connection-oriented traffic, such as voice traffic see AAL AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. Port Console ( control port opening ) the Cisco a typical routers and switches on the RJ-45 ports, with The line is damaged , the interface does not have any connection cable. Serial1 is up, line protocol is down Frame-relay interface-dlci ??? Assign a specific PVC to this subinterface . ??? is the PVC number . Class A network (A Class network ) portion of the Internet Protocol hierarchical addressing scheme. Class A network only FEIP Fast Ethernet Interface Processor (Fast Ethernet Interface Processor) Cisco7000 Series Routing Data Link layer ( data link layer ) the OSI of the reference model 2 layer which ensures that data across the physical link 1. refuse 2. allowed guard band ( guard band ) two communication channels between a frequency region not used to provide the necessary space to avoid interference therebetween. BPDU: Bridge Protocol Data Unit Bridge Protocol Data Unit =========================================================== =============== There are two types of ACLs : Access-list 100 permit IP any any Packet Exchange : X.25, Frame-Relay, ATM Frame-relay switching Ip add 10.1.1.1 255.255.255.0 Packaging method. HDLC is a bit-oriented synchronous data link layer protocol created by ISO , which originated from SDLC . However, most HDLC vendor implementations ( including Cisco 's ) is patented. See SDLC . DCC data Country Code (Data Country Code) developed by the ATM Forum for the use of private networks 1. Bandwidth 2. Delay 3. Reliability 4. Load 5. MTU Interface s 1 no ip add Please refer to the second part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection delay ( delayed ) once buried Office from the beginning to the sender when they receive a response elapsed between the first end-to-end VLANs ( end the VLAN) ----- across the switch fabric (switch-fabric) from end to end Specify the idle IP of the address pool ASP AppleTalk Session Protocol (APC) is established and maintained using ATP . B(config)#inte s 0 CIDR stepless routing domain (Classless Interdomain Routing) stepless routing protocol AAL1 ATM Adaptation Layer 1 One of the four AALs recommended by ITU-T for connection-oriented, constant B (config-if) #ip nat inside configured S0 interface inside the network It consists of a router or access server or several routers or access servers, using inter-access tables and other methods to ensure the security of the private network. dixed configuration router ( fixed router ) can not be used to upgrade any new interfaces of the router. The input is copied over the length of the medium and received by all other stations. Compare ring and star . =========================================================== =============== R6(config)#interface ethernet 0 =========================================================== =============== Redundant topology , causing " broadcast storm ", " multiple frame reception ", "MAC address table instability ". 16 , 32 , 64 and 128 are used. Router rip selection rip as the routing protocol CER cell error ratio (cell error ratio) ATM cell, a transmission error within a certain time and CiscoView GUI management software for Cisco network devices that provides dynamic status, statistics, and full IBM agency link. See FRAD . The reduced mode IP multicast scheme uses TGMP to transport routing datagrams between its neighbors. See IGMP . Ciscoa.njut.edu.cn data compression ( data compression ) See compression . Clear line * Force interrupt "telnet to local " session The quantity manages a QoS parameter specified when the connection is established . In CBR transmission, the degree of allowable fluctuation of data sampling by PCR is determined by the CDVT . See CBR and PCR . A non-distributed backbone. A folded backbone can be a virtual network segment that works in a device such as a router, hub, or switch. Hostname ABC configuration local username Available in four different frame types. They are not compatible with each other, so for two hosts to communicate, they must use the same frame type. Rip Version 2 : The bit set in the frame when the frame relay network encounters a congestion path. Receiving a DTE with a BECN frame can require the advanced protocol to take the necessary flow control measures. Compare FECN . Fallback (in the fall ) ATM network, this mechanism is used to get a path, if it can not use the regular side TCP ( Transmission Control Protocol ), connection-oriented , with retransmission mechanism , reliable transmission R6(config-if)#ip address 1.1.1.1 255.255.255.0 ASICs for integrated circuit applications ----- used for the first 2 layer switches filtering decision. ASIC view degree. Address learning, forwarding filtering, etc. of the switch : 20s 15s 15s Exit application and exit the database configuration mode of the VLAN Guide IOS and how to configure it. Kind of protocol to communicate. The bridging function is at the data link layer, layer 2 of the OSI reference model . The purpose of the bridge is to filter, send or spread any incoming frames based on the MAC address of the particular frame. Change type. Sometimes called modified cut-through . Configure ACL to reject london to access Denver No * do the reverse operation of the configuration =========================================================== =============== Binding ( binding ) in LAN configuration on a network layer protocol to use some type of frame The traffic " rounds and goes to the router. A bridge with low path overhead. Used to connect to remote sites . R14#debug isdn events R14#show isdn active The input is copied over the length of the medium and received by all other stations. Compare ring and star . analog transmission ( analog transmission ) represented by different combinations of the information signal amplitude, frequency and phase 1.544Mb/s . In Frame Relay and other technologies, it can be a partial T-1 connection ( for example, 256kb/s) , but the access rate and clock rate are still I.544Mb/S. auto-detectmechanism ( automatic detection mechanism ) for use in Ethernet switches, hubs, and the interface card, AMI Alternate Mark Inversion (Alternate Mark Inversion) T-1 and E-1 A circuit on a circuit compiled AppleShare and Mac OS file sharing allows users to share files and applications on the server. 1. The content of the announcement : a copy of the routing table (copy) 2. The time of the announcement : periodicity 3. The object of the announcement : the directly connected neighbor router " The main explanation is B , C words that begin with. (ChinaITLab) FECN: Forward Explicit Congestion Notice show flash: view flash in the IOS file CDP Cisco Discovery Protocol (Cisco Discovery Protocol) Cisco proprietary protocol, used to tell the neighbor GNS the nearest server (Get Nearest Server): in the IPX network, to determine a customer a request of a given type of packet location nearest transmitted activation server. An IPX network client issues a GNS request to obtain a response from a connected server or a response from a router that discloses the location of the server on the internet. GNS is part of IPX and SAP . See IPX and SAP . End exit port configuration device The header and the trailer are encapsulated. The interconnected network acts as a virtual link through an external network ( such as TCP/IP) . See AURP . 1. Static NAT 2. Dynamic NAT 3. PAT Any device connected between. See Cisco FRAD and FRAS . Available in four different frame types. They are not compatible with each other, so for two hosts to communicate, they must use the same frame type. Coaxial cable classification for signaling. Compare baSeband . buffer ( Buffer ) designed to store data processed in the transmission. Buffer for receiving / storage Network *.*.*.* declares the interface declaration interface : =========================================================== =============== Propagation through hubs and repeaters, but not through LAN switches, routers, or bridges. See collision . COmposite metric ( complex metrics ) with IGRP and EIGRP use with such routing protocol, RIP: Is the hop count as the metric for selecting the best route. The wrong route will be selected incorrectly. The name-to- IP address resolution is provided on the special network . An example of an FQDN is bob.acme.com . The other party does not have no shutdown to activate the port. ATP AppleTalk transaction protocol (AppleTalk Transaction Protocol) a transport layer protocol, =========================================================== =============== The router of the DCE needs to configure the clock frequency. Fallback (in the fall ) ATM network, this mechanism is used to get a path, if it can not use the regular side Owned and running network. Typically specified by the network administrator and used by routing protocols to compare different routes through an internetwork. The routing protocol uses the cost value to select the best path to a destination : the lowest cost identification best path. See routing metnC . Classical IP over ATM ( classical IP over ATM) is defined in RFC 1577 to make ATM features Demodulation ( demodulating ) a modulated channel port returns to its original form of a series of steps. Modulation when receiving R1(config)#no cdp run disables CDP protocol in global configuration mode ( affects all interfaces ) r1(config-if)#no cdp enable disables CDP protocol on interface ( only affects the specified interface ) clear cdp table clears CDP neighbors table 1.cisco hdlc: can support multi-protocol environment , by adding the " attribute " field . 2.standard hdlc: only support single-protocol environment Link state type routing protocol: The bit, that is, a number cannot be divisible by 8 . Alignment errors are usually the result of frame corruption caused by conflicts. between. It is also the time it takes for a packet to travel from its source through a path to its destination. See latency . Demarc ( demarcation ) The demarcation point between the Customer Premises Equipment (CPE) and the telephone company carrier equipment. 1. Switch and bridge 2. How many segments ( ports ) of switches and bridges have conflicting domains . 0x0 indicates that the router is going to enter the Rom monitor mode. filtering ( Filter ) The following table provides security on the network by between visits. Show version Observe the IOS version device working time related interface list show running-config View the currently active configuration This configuration file is stored in RAM show interface ethernet 0/1 to view the status of the Ethernet interface working status, etc ... And track . 1 th D channels ( each 64Kb / s) a part in which a single channel or channel group are connected to different destinations, supports the DDR , Frame Relay, and the X.25 . Compare channelized E-1 . Ripv2 certification : lOBaseT , Fast Ethernet, and lEEE . Piece address. The switch then filters the network with a known hardware address (MAC) can The data can exceed the bandwidth normally reserved for the connection, but cannot exceed the port rate. An example of this is a 128Kb/s Frame Relay CIR on T-1 - depending on the vendor, it is possible to send at a rate of more than 128Kb/s for a short time . Call setuptime ( call setup time ) affects the length of time required for switched calls between DTE devices Frame-relay map ip 10.1.1.2 110 broadcast for manual static mapping UTR Data Terminal Ready (Data Terminal Ready) ----- an activated with DCE communication Enable enter privileged mode ATP AppleTalk transaction protocol (AppleTalk Transaction Protocol) a transport layer protocol, coimnection ID ( connection ID) ----- each into the router's Telnet identifying the session analysis. Show Bridge ( bridge ) two devices connected to the network and transmit data packets therebetween. Both paragraphs must use the same Configuration and beacon . ITU-T standard. Currently BISDN uses ATM technology and SONET- based transmission circuits to provide 155Mb/s and BGP4 BGP Version 4 (BGPversion4) ----- versions of the most common on the Internet inter-domain routing protocol 4 . Piece address. The switch then filters the network with a known hardware address (MAC) R6(config-if)#ip address 1.1.1.1 255.255.255.0 The packet's ability to process packets faster. =========================================================== =============== Bit, Frame, Packet, and Segment are all called : PDU (Protocol Data Unit) =========================================================== =============== CHAP: Challenge three-way handshake , the password is transmitted by HASH algorithm , which is stronger than PAP. H channel (H channel ) high-speed channel (high-speed channel): a full-duplex, the 384Kb / s work on rate ISDN primary rate channel. See B channe , D channel , and E channel . ------------------------------------------------ Port number : Provides the session layer to distinguish data without the application . Identity service . ELAP EtherTalk Link Access Protocol (EtherTralk Link Access Protocol) on EtherTalk Network Network connection. The bit set in the frame when the frame relay network encounters a congestion path. Receiving a DTE with a BECN frame can require the advanced protocol to take the necessary flow control measures. Compare FECN . Please refer to the third part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection =========================================================== =============== FRAME-RELAY topology (pvc) edge. When any member of the peer group wants to find a resource, it sends a probe to the border peer. The border peer then forwards the request on behalf of the requesting router, thus eliminating duplicate traffic. Router, which is required for other special tasks in OSPF operations. A multi-access OSPF network with at least two routers selects a router through the OSPF Hello protocol, which makes the multi-access network necessary neighbors. Programmable after shipment, these non-volatile memory chips can be wiped off and reprogrammed with high power light when needed. See EEPROM and PROM . The level is set to 32768 . R14(config)#interface bri 0 B(config)#inte s 1 Floating routes ( floating routers ) are used along with dynamic routing to provide backup routes to prevent failure. NextHopIP: Next hop IP Interface serial 0 The clock frequency Serial1 is up, the line protocol is up interface is working properly. Target port : None Use more than one metric to find the best path to a remote network. By default, both IGRP and EIGRP use the bandwidth and latency of the line. However , the reliability of the Maximum Transmission Unit (MTU) , load, and link can also be used . The header and the trailer are encapsulated. The amount of time. By default, the cdp timer is 90 seconds. Piece address. The switch then filters the network with a known hardware address (MAC) =========================================================== =============== show vtp status view VTP status =========================================================== =============== =========================================================== =============== =========================================================== ================ Telnet *.*.*.* is a telnet device . You need to set the password for line vty . If you need to enter privileged mode, you need to configure it. VTP is the use multicasting to advertise, VTP will intervals . 5 minutes announcement once , even if there is no change .VTP switch synchronized the last configuration . all-routes explorer packet ( full routing packet detection ) a can pass over the entire SRB sounding packet network, Control distribute VCC ( Control Distribution VCC) Phase I LAN simulation defines three control connections 1. Control network traffic 2. Implement packet filtering =========================================================== =============== DSR modem is ready (Data Set Ready) ----- When the DCE energized and ready to run, this 1. refuse 2. allowed =========================================================== =============== Use the range of numbers assigned. The value of the cable range can be a sequence of one or several consecutive network numbers. Node addresses are determined by their cable range values. B(config-if)#ip nat outside configure S1 interface for the outside network to specify which hosts can NAT Broadcasting is not supported by FRAME-RELAY , which will cause the route to be unadvertised . Solution : Copy multiple frames for announcement. Classical IP over ATM ( classical IP over ATM) is defined in RFC 1577 to make ATM features RIP: Is the hop count as the metric for selecting the best route. The wrong route will be selected incorrectly. AMI Alternate Mark Inversion (Alternate Mark Inversion) T-1 and E-1 A circuit on a circuit compiled Terminal history size <0-256> set command buffer size 0: means no cache Access control list (ACL) Data Link layer ( data link layer ) the OSI of the reference model 2 layer which ensures that data across the physical link VCC does not guarantee QoS, they are usually reserved for UBR and ABR connections. Compare control distribute VCC and NET / ADAPTIVE company in I991 co-founded the international organization, the organization for the development and promotion of the ATM standards-based technology implementation of the agreement. The ATM Forum relaxed the official standards developed by ANSI and ITU.T and created implementation agreements before the official standards were released. ARA AppleTalk Remote Access (AppleTalk Remote Access) is built for Macintosh users Basic Management Setup ( basic management established ) Cisco routers to establish mode. only Exit Broadcast ( Broadcast ) ----- a data frame or packet is transmitted to the local network segment ( defined by the broadcast domain ) for each node on. Broadcast broadcast address indicated by its destination network and host address bits are all 1 . Also known as " local broadcast " . Compare directedbroadcast . Boot ROM ( Boot ROM) for the router in order to release the boot mode router. Then guide connection-oriented ( connection-oriented ) to establish a virtual circuit data before any data transmission RIP: Is the hop count as the metric for selecting the best route. The wrong route will be selected incorrectly. ! =========================================================== =============== Centrex ( Central Switch ) A local switched carrier service that provides local handover similar to live PBX Connect the SDLC device to Frame Relay without the need for an existing LAN . It is also possible to upgrade to a full-featured multi-protocol router. The conversion from SDLC to Ethernet and Token Ring can be activated , but the attached LAN is not supported . See FRAD . The pick-up point is specified in the destination field of the packet. See SSAP and SAP . Layer Access ( Access Stratum ) ----- the Cisco three-layer hierarchical model. The access layer allows users to access the Internet. expedited delivery ( accelerated delivery ) may be the same or other layers of protocol of a different network device in B(config)#inte s 1 Cable Crossover ( crossover cable ) is connected to the switch switches, host-to-host, hub to hub BPDU: Bridge Protocol Data Unit Bridge Protocol Data Unit Config-register 0x2142 modify the startup configuration key Copy tftp: startup-config copy flash: tftp: 1. Bandwidth 2. Delay 3. Reliability 4. Load 5. MTU ASP AppleTalk Session Protocol (APC) is established and maintained using ATP . =========================================================== =============== NextHopIP: Next hop IP Surgery. The IBM network is called pacing, meaning that when the receive buffer is full, a message is transmitted to the sending unit to suspend transmission until all data in the receive buffer is processed and the buffer is ready to receive again. circuit switching ( circuit switched ) ----- dial-up networking ( such as PPP and ISDN) used together. Passing the data but needing to establish a connection first—just like making a phone call. Cisco FRAD Cisco Frame Relay access devices (Cisco Frame Relay Access Device) support for Cisco IPS Frame Relay SNA traffic a Cisco product, Bus ( bus ) through a physical path ( usually wire or copper wire ) a digital signal can be used to calculate =========================================================== =============== AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. IOS Cisco Cisco Internetwork Operating System Software (Cisco Internetwork Operating System software) ----- as CiscoFusion provide the functionality shared by all products in the off-line configuration, scalability and security of Cisco core routers and switches series. See CiscoFusion . An octet divided into four points, followed by a forward slash and the number of the masked bit ( abbreviation of the subnet symbol ) . See Exit Bit rate time sensitive services such as simultaneous traffic and uncompressed video. Playing AAL Show frame-relay lmi show frame-relay pvc show frame-relay map Flapping ( flip ) describe a term serial interface to be opened and closed. =========================================================== =================== Topology Bus ( bus topology ) a straight LAN off-line structure, wherein transmission from each station on the network ITU-T standard. Currently BISDN uses ATM technology and SONET- based transmission circuits to provide 155Mb/s and ATMARP server (ATMAPR server ) provides a logical subnet to run the address resolution service. AMI Alternate Mark Inversion (Alternate Mark Inversion) T-1 and E-1 A circuit on a circuit compiled Class A network (A Class network ) portion of the Internet Protocol hierarchical addressing scheme. Class A network only The name of the Cisco Fusion Cisco Internetwork architecture on which Cisco IOS completes operations. design =========================================================== =============== An example. Also known as " narrowband " . For broadband . R14(config-if)#dialer-group 9 A service-related sublayer of the AAL ATM adaptation layer data link layer, data link layer from other applications RA: outside interface address is unknown , how do PAT configuration commands The distance limit of each segment of 1OBaseT is about 100 meters. See Ethernet and IEEE 802.3 . Layer , Presentation layer , Session layer , and Transport layer . data terminal equipment ( Data Terminal Equipment ) , see the DTE . Frame-relay map ip 10.1.1.2 110 broadcast for manual static mapping Choose an agreement. between. It is also the time it takes for a packet to travel from its source through a path to its destination. See latency . Demarc ( demarcation ) The demarcation point between the Customer Premises Equipment (CPE) and the telephone company carrier equipment. convergence ( convergence ) Internet in all routers update their routing tables and create a consistent PPP 's own password configuration dial backup ( Dial Backup ) dial-up connection is typically used to provide redundancy backup frame relay connection. Backup chain R14(config-if)#dialer idle-timeout 60 =========================================================== =============== AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. . 1 E-Channelized ( channelization E-1) operate in 2048Mb / s access to a link, a 29 th B A technique that allows for more data. Typically specified by the network administrator and used by routing protocols to compare different routes through an internetwork. The routing protocol uses the cost value to select the best path to a destination : the lowest cost identification best path. See routing metnC . AAA- ---- Authentication (Authentication) , authorization (Authorization) and statistics (Accounting) Cisco =========================================================== =============== De-encapsulation ( disassembly ) layered protocol technology, in which a layer of slave layer protocol data unit baseline ( baseline ) baseline information, including historical data and information about the routine use of the network. This letter Code, during each bit cell 0 with "01" indicates, an alternating Points "11" or "00" . FIG. The sending device must maintain a density of 1 in the AMI but is not independent of the data stream. Also called the alternating mark reverse of the binary code. Control B8ZS . See ones density . Datagram ( datagram ) as a network layer unit without the need to pre-establish virtual circuits and transmit them on the medium In ABR service allows a congestion feedback mode. EFCI can be set by any network element in immediate or some kind of congestion state. The destination end system can perform a protocol that adjusts and lowers the cell rate of the connection based on the EFCI value. See ABBR . CD carrier detection (cairierdetect) indicates that an interface has been activated or a modem-generated connection OSPF uses IP packets for route advertisement and learning , Protocol Number : 89 lOBaseT is ten times faster, while retaining properties like MAC mechanism, MTU and frame format. These similarities enable existing lOBaseT applications and management tools to be used in Fast Ethernet networks. Fast Ethernet is an extension (IEEE 802.3U) based on the IEEE802.3 specification . Compare Ethemnet . See lOOBaseT , IOOBaseTX, and IEEE . Piece address. The switch then filters the network with a known hardware address (MAC) Externally connected to each interface of the device. This technology can be used by bridges and switches to transmit traffic over the network. distribution layer ( distribution layer ) the Cisco intermediate three layer hierarchical model, which contribute to the design, installation and maintenance 1. Full mesh 2. Half mesh 3. Star and spoke The law finds a word. The device relaxes the requirements for a feature ( such as latency ) and tries to find a path that meets the most important needs of a group. =========================================================== =============== Other features are available, including timing. This is an extended version of SF . See SF . Advertising ( advertisement ) routing or service update is sent at a given interval, allowing on the network Network 192.168.1.0 0.0.0.3 Network 192.168.1.0 0.0.0.255 area 0 =========================================================== =============== NetMask: target network subnet mask BGP4 BGP Version 4 (BGPversion4) ----- versions of the most common on the Internet inter-domain routing protocol 4 . ATM Forum (ATM Forum ) ----- by the Northern Telecom , Sprint , the Cisco Systems and Route the path of the bridged network. routing Classless ( stepless routing ) transmits routing update routing subnet mask. Stepless road Line : PPP, HDLC, SLIP AMI Alternate Mark Inversion (Alternate Mark Inversion) T-1 and E-1 A circuit on a circuit compiled Control distribute VCC ( Control Distribution VCC) Phase I LAN simulation defines three control connections Use the range of numbers assigned. The value of the cable range can be a sequence of one or several consecutive network numbers. Node addresses are determined by their cable range values. CCNA classroom streamlined notes RouterID generated ? Part of the original IEEE802.3 standard for 10BaseT , 1OBaseT is the 1OMb/s baseband Ethernet specification. =========================================================== =============== UTR Data Terminal Ready (Data Terminal Ready) ----- an activated with DCE communication A Cisco hierarchical network. The core layer quickly passes packets to the distribution layer device. No packet filtering is performed at this level. =========================================================== ===================== A(config-keychain)#exit VLAN characteristics =========================================================== =============== =========================================================== =============== AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. change. The central switch does not have on-site switching capabilities. Therefore, all customer connections are returned to the CO . See CO . show flash: view flash in the IOS file =========================================================== =============== delay ( delayed ) once buried Office from the beginning to the sender when they receive a response elapsed between the first Data link layer : data error detection , physical address MAC Frame Programs ( such as email or file transfers ) to provide services. This layer selects and determines the validity of the communication object and the resources needed to establish the connection, coordinates the cooperating application, and forms a consistent process in controlling data integrity and error recovery.