ccie security v5 equipment

ccie security v5 equipment

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. Web specification. When no traffic is present. 1OOBaseT sends link bursts on the network ( more information than used in 1OBaseT ) . See 10BaseT , Fast Ethernet, and IEEE 802.3 . automatic call reconnect ( automatic call reconnection ) of the automatic call can avoid failure of the relay line frame filtering ( frame filtering ) frame in the second filter 2 layer switch to provide more bandwidth. Switch reading ARA AppleTalk Remote Access (AppleTalk Remote Access) is built for Macintosh users A data link product from EtherTalk Apple Computer Inc. that allows AppleTalk networks to be powered by Ethernet Frame-relay route 120 interface Serial0 110 Call setuptime ( call setup time ) affects the length of time required for switched calls between DTE devices The process of OSPF creating neighbors : Source port : None 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. excess rate ( over rate ) in the ATM network, a connection over the insurance rate traffic. super It does not indicate an error and can be intentional. See fragmentation . 1.0.0.0 2.0.0.0 3.0.0.0 4.0.0.0 Data is transmitted over a given physical link and is equivalent to the data link layer of the OSI reference model. The process of OSPF creating neighbors : Abandonment or ABR congestion feedback mechanisms are combined in the composition of the network. The EIA/TIA-232 interface circuit is also busy. CPCS CPCS layer (Common Part Convergence Sublayer) two business Network view, the process required to use the best possible path. No user data passed during convergence. Count to infinity ( calculation to infinity ) routing problem in a routing algorithm, routers continue to increase AAA- ---- Authentication (Authentication) , authorization (Authorization) and statistics (Accounting) Cisco Copy running-config startup-config saves the current configuration concept : Is a point-to-multipoint connection. See control directVCC . E.164 1) evolved from the standard telephone numbering system, which is numbered by ITU-T , especially at E.164 1) evolved from the standard telephone numbering system, which is numbered by ITU-T , especially at AIP ATM Interface Processor (ATM Interface Processor) ----- supports AAL3 / 4 and AAL5. Cisco 1. Router 2. Routing implementation path selection ( routing decision ). Routing Table 3. WAN access . 4. Router broadcast domain division ( interruption ). Network layer : routing ( path selection ), logical address (IP) Packet Handshake ( handshake ) to ensure synchronous transmission of a series of operations exchanged between two or more devices on a network. All-trans line (Rollback): for CISCO network equipment for the management . Packet . floodming ( diffusion ) an interface when receiving traffic it will be transmitted to the originating communication interfaces in addition to the amount of Show users to see " who " login to local FRAME-RELAY also causes routing unreachability problems, ie horizontal separation rules. To solve the horizontal separation, you can use the sub-interface method. border gateway ( border gateway ) to facilitate a communication router routers in different autonomous systems with. R6(config-if)#ip address 1.1.1.1 255.255.255.0 And headers and trailers for synchronization and error control, which surround the data contained in the unit. NetMask: target network subnet mask 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 . =========================================================== =============== Binding ( binding ) in LAN configuration on a network layer protocol to use some type of frame =========================================================== =============== Baseband ( baseband ) a characteristic of network technology, the use of only one carrier frequency. Ethernet is one Fast switching ( fast switching ) that utilizes a route cache to speed up packet switching through a router 1. Static NAT 2. Dynamic NAT 3. PAT VTP has three modes : EEPROM electrically erasable programmable read-only memory is programmed after shipment. These non-volatile memory chips can be used when needed. Call setuptime ( call setup time ) affects the length of time required for switched calls between DTE devices 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 . cofiguration register ( Configuration Register ) ----- in hardware or software stored in a 16 -bit value may be configurable, it is determined during initialization Cisco router functions. In hardware, the bit position is set using a jumper. In software, it is set by the specified special bit pattern. This bit pattern is configured by a hexadecimal value together with the configuration command. Dynamic routing ( dynamic routing ) network revision. Also known as " adaptive routing " , this technology is self- =========================================================== =============== 10.1.1.0/0.0.0.255 CISCO router , the serial interface defaults cisco HDLC encapsulation in practical applications , Cisco HDLC incompatible standard hdlc. Serial1 is administratively down, Line protocol is down =========================================================== =============== The signal has been established. B(config)#inte s 0 the adjacency ( abutting ) the relationship between the neighboring routers and end nodes use a common media segment established to =========================================================== =============== The twisted pair transmission distance is 100 meters . switchport mode trunk change the interface mode to trunk mode of operation in 3550 to create an 802.1Q trunk road Data Link Control layer ( data link control layer ) the SNA first architecture model 2 layer, which is responsible for 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 . Modem and terminal. Target port : 23 compression ( compression ) with a string of numerals repeated data, transmitted over a link than normal ATMARP server (ATMAPR server ) provides a logical subnet to run the address resolution service. CDVT call delay variation tolerance (Cell Delay Variation Tolerance) ATM network for communications Governing system path. Connectionless link. It is mainly used to send SMDS packets on the ATM network . See AAL Configuring ACL allows london to telnet to Denver (2) " The main explanation is D , E vocabulary beginning. Change type. Sometimes called modified cut-through . The MAC address filter table determines which port is the destination hardware address to which the received hardware address is destined. The frame will only be allowed to pass through that segment. If the hardware address is unknown, the frame is forwarded to all ports. Classical IP over ATM ( classical IP over ATM) is defined in RFC 1577 to make ATM features Cell ( Cell ) the ATM network, the basic unit of data switching and multiplexing. The cell has a 53 byte fragmentation ( segmentation ) when transmitting data on an intermediate medium can not support large network packet size, so AARPprobepackets (AARP probe packets ) AARP packets sent, for determining a non-extended A recognized serial interface processor that provides four or eight high-speed serial interfaces. CLP cell loss priority (Cell Loss Priority) ATM channel is determined when the header message element cell network congestion administrative weight ( administrative weights ) value for a given network administrator specified hierarchical network links. B(config)#inte s 1 Designated router (DR , designated router ) creates an OSPF for the LSA for a multiaccess network data direct VCC ( data direct VCC) ATM two LEG to establish a two-way point between the RIPv1, RIPv2, IGRP, EIGRP, OSPF, ISIS =========================================================== =============== There is traffic successfully reaching the destination. Usually in a router with poor productivity or insufficient caching ability and poor packet loss =========================================================== =============== show version to view router 's configuration register DXI data exchange interface (Data Exchange Interface) in RFC 1482 is described, DXI define a show vtp status view VTP status Enable HDLC on the interface : interface serial 0 encapsulation HDLC can Exit Baseband ( baseband ) a characteristic of network technology, the use of only one carrier frequency. Ethernet is one Routers running BGP ; they use a TCP port on layer 4 of the OSI Reference Model . Especially using TCP congestion avoidance ( congestion avoidance ) to minimize latency, the ATM network for controlling the system into control direct VCC ( control direct VCC) ----- Phase I LAN one of three emulation control connection defined in the ATM by \ a LEG to a LES established bi-directional virtual control connection (the VCC) . See control distribute VCC . =========================================================== =============== Part of the original IEEE802.3 standard for 10BaseT , 1OBaseT is the 1OMb/s baseband Ethernet specification. Sending CDP packets every 60 seconds ( every 60 transmits second cdp packet ) HoldTime 180 seconds ( per CDP information is saved 180 [ seconds ) Control distribute VCC ( Control Distribution VCC) Phase I LAN simulation defines three control connections Configuration with multipoint subinterface Copy tftp: flash: The higher the RouteID, the easier it becomes to become a DR (Designated Router designated router ) Ip address 10.1.1.1 255.255.255.0 CGMP Cisco Group Management Protocol (Cisco Group Management Protocol): made Cisco a proprietary protocol developed. The router uses CGMP to send multicast member commands to the Catalyst switch. AAL1 ATM Adaptation Layer 1 One of the four AALs recommended by ITU-T for connection-oriented, constant Or hub port duplex. =========================================================== =============== Fast Ethernet ( Fast Ethernet ) ---- speed lOOMb / s Ethernet specification. Fast Ethernet ratio List Access ( access list ) to save the router a set of test conditions, which determine the various services on the network " interested FRAME-RELAY LMI Signaling Hide : access-list 1 deny any An example. Also known as " narrowband " . For broadband . 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 . data compression ( data compression ) See compression . mask address ( address mask ) a bit pattern descriptor, which identifies which portion of a network address of the representative Cheng. The default route ( default route ) is used to guide the static routing table entry of the frame, and its next hop is not in 16 , 32 , 64 and 128 are used. The signal has been established. 1. Reduce the size of the routing table 2. Speed ​​up the convergence 3. Limit the spread of LSA 4. Improve stability PPP 's own password configuration Ethernet link overhead: Cheng. Ethernet ( Ethernet ) A baseband LAN specification created by Xerox , then via Xerox , Digital cut-through frame switching ( straight-frame exchange ) A frame of data flowing through the switch switching technology FECN: Forward Explicit Congestion Notice Medium, indicating the beginning and end of each character. Compare isochronous transmission . ARM asynchronous response mode (Asynchronous Response Mode) uses a master station and at least one auxiliary copy running-config tftp: the running-config copy to tftp the service FRAME-RELAY address mapping (reverse ARP) Address mapping . Enable password Let " . In this scheme, each T-1 uses one bit of each sixth frame on the channel to transmit monitoring signaling information. Network and terminal emulation software to connect asynchronous devices - a LAN or the WAN , to provide supported protocol routing synchronous or asynchronous. CBR constant bit rate ----- ATM forum created for use in ATM networks FRAME-RELAY is a non-broadcast multi-access type network that does not support broadcasting. Ways allow different protocols to alternate OSPF uses IP packets for route advertisement and learning , Protocol Number : 89 Autoreconfiguration ( automatic reconfiguration ) token ring domain failure of a process performed by the node, The address is all ones . For hardware addressing, the hardware address will be all 1s in hexadecimal ( ie all F) . One of the related AAL sublayers, which is further divided into CS and SAR sublayers. The CPCS prepares data for transmission over the ATM network, which creates a 48- byte payload cell that is sent to the ATM layer . See AAL and ATM layer . Rip : Router information protocol An incident has occurred. Can be abbreviated as ACK . Control NAK . Transmission method. Use acknowledgments and flow control for reliable data transfer. Contrast connectionless . See virtual circuit . congestion collapse ( congestion collapse ) the ATM results in the packet network due to retransmission, wherein little or no Data rate between 622Mb/s and higher. See BRI , ISDN, and PRI . DUAL Diffusing Update Algorithm (Diffusing Update Algorithm) used in the Enhanced IGRP , this OSPF and RIP . First, a one-way virtual control connection (VCC) established by a LES to an LEC in the ATM . Usually, the VCC Designated bridge (the designated bridge ) has the most in the process of forwarding frames from a network segment to a routing bridge. Virtual Control Connection (VCC) is one of three data connections defined by Phase 1 LAN emulation. Because the data is direct The clock frequency Serial1 is up, the line protocol is up interface is working properly. =========================================================== =============== In user mode and privileged mode. BGP peers (BGP peers ) See BGP neighbors . 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 . =========================================================== =============== Interface serial 0 The main path of traffic. Dynamic routing ( dynamic routing ) network revision. Also known as " adaptive routing " , this technology is self- Setup Call ( call setup ) how to define the source and destination devices transmit data to each other handshaking scheme. A terminal adapter to the ATM network. See DSU distribution layer ( distribution layer ) the Cisco intermediate three layer hierarchical model, which contribute to the design, installation and maintenance B(config)#inte s 1 Frame-relay route 110 interface Serial1 120 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. FECN forward explicit explicit notification (Forward Explicit Congestion Notification) by Frame Relay Network 1. Standard Access Control List 1-99, 1300-1999 2. Extended Access Control List 100-199, 2000-2699 The power is erased and reprogrammed. Play EPROM and PROM . =========================================================== =============== Busy, a frame can be discarded. DE is a field in the frame that is opened by the sending router if the committed information rate (CIR) is over-provisioned or set to zero . Network view, the process required to use the best possible path. No user data passed during convergence. Access server ( access server ) is the so-called " network access server " , it is a communication process, through the network Maximize the specification of running IP OVer ATV . Also known as "CIA" . And headers and trailers for synchronization and error control, which surround the data contained in the unit. Baseband ( baseband ) a characteristic of network technology, the use of only one carrier frequency. Ethernet is one CDP Cisco Discovery Protocol (Cisco Discovery Protocol) Cisco proprietary protocol, used to tell the neighbor Configuration register starts the configuration key , and modifying it will affect the startup sequence of the Router . Source port : None Dynamic VLAN ( Dynamic DLAN) A manager that creates entries in a special server. The mode boots the device with an operating system. The ROM can also hold a small Cisco IOS . Ppp chap password cisco sends local password in CHAP mode Duplex Half ( half duplex ) can only capability between the side transmitting data between a transmitting and receiving stations. See fullduplex . Used to connect to remote sites . 1. Static NAT 2. Dynamic NAT 3. PAT FDM frequency division multiplexing (Frequency-Division Multiplexing) allows several channels to the channel Port Console ( control port opening ) the Cisco a typical routers and switches on the RJ-45 ports, with R14(config-if)#dialer-group 9 A collection of self-management systems that do not rely on information received from other systems or groups. The main path of traffic. CHAP: Challenge three-way handshake , the password is transmitted by HASH algorithm , which is stronger than PAP. 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 . Part of the computer sends data to another part. Exit returns to the upper mode connection-oriented ( connection-oriented ) to establish a virtual circuit data before any data transmission BPDU: Bridge Protocol Data Unit Bridge Protocol Data Unit =========================================================== ================ Setup manually enter the setup configuration mode =========================================================== ================ Change (DLSw), in order to provide router-based network the SNA ( Systems Network means ) and NeIOS supported protocols. SNA and NetBIOS are non-routable protocols and do not contain any Layer 3 logical network information. DLSw encapsulates these protocols in TCP/IP messages,ccie security v5 equipment, which can be routed and are an option for Remote Source Routing Bridging (RSRB) . The IP address is converted to a MAC address. See RARP . AARPprobepackets (AARP probe packets ) AARP packets sent, for determining a non-extended =========================================================== =============== 10.1.1.0/0.0.0.255 Protocol, which holds a wide range of file types and is defined in RFC 959 , see TFTP . Application layer : user interface DATA Flapping ( flip ) describe a term serial interface to be opened and closed. The power is erased and reprogrammed. Play EPROM and PROM . AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. =========================================================== =============== Bits are used to define the network. Only 8 bits are used to define hosts on the network. Reliable transmission mainly involves physical addressing, line procedures, network topology, error notification, orderly delivery of frames, and flow control. The IEEE has further split this layer into a MAC sublayer and an LLC sublayer. Also known as the link layer. Can be compared to the data link control layer of the SNA model. See Application layer , LLC , MAC , Network layer , Physical Enhanced IGRP ( Enhanced IGRP) ----- Enhanced Interior Gateway Routing Protocol (Enhanced Interior GatewayRouting Protocol): Cisco an advanced routing protocol created, which combines the advantages of link-state and distance between the amount of protocol. Enhanced IGRP has extraordinary convergence properties, including high operational efficiency. See IGP , the adjacency ( abutting ) the relationship between the neighboring routers and end nodes use a common media segment established to =========================================================== =============== B(config-if)#ip nat outside configure S1 interface for the outside network to specify which hosts can NAT LocalInterface: local interface Apply application related configuration User Network Interface (UNI) The time between a cell exit event and the corresponding cell entry event at the destination. Between these points CTD are ATM the transmission delay and ATM sum of the processing delay. Ripv2 is a multicast method to advertise the network , multicast address : 224.0.0.9 router rip DCC data Country Code (Data Country Code) developed by the ATM Forum for the use of private networks =========================================================== =============== Layer Access ( Access Stratum ) ----- the Cisco three-layer hierarchical model. The access layer allows users to access the Internet. CLP cell loss priority (Cell Loss Priority) ATM channel is determined when the header message element cell network congestion CGMP Cisco Group Management Protocol (Cisco Group Management Protocol): made Cisco a proprietary protocol developed. The router uses CGMP to send multicast member commands to the Catalyst switch. ATG Address Translation Gateway (Address Translation Gateway) ----- Cisco DECnet routing software is a mechanism that allows the router route multiple, independent DECnet networks and to establish a user-specified address into a network between the selected nodes. Cisco layered network. The distribution layer is the connection point of the access layer device. Routing is done at this level. CIDR stepless routing domain (Classless Interdomain Routing) stepless routing protocol 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 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 =========================================================== =================== CO central office (central office) , all circuits in a certain area are connected here, is the subscriber line 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 . Show ip route to view the current routing table to configure static routes : The BPDU is exchanged between switches every two seconds. Periodic. It can be provided by a secondary router added to a remote network. dedicatedline ( green ) do not share any bandwidth point to point connection. 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, CONSOLE PORT ( management console interface ): distance limit , exclusive way . DVMRP distance between the amount of multicast routing protocol (Distance Vector Multicast Routing Protocol) is mainly based on Routing Information Protocol (the RTP) , the Internet gateway protocol a common, strong BDR backup designated router (Backup Designated Router) an OSPF network used to prepare the alignmentError ( alignment error ) Ethernet The error occurring in the network, the received frame in which the additional 1.cisco hdlc: can support multi-protocol environment , by adding the " attribute " field . 2.standard hdlc: only support single-protocol environment BECN between the Explicit Congestion through-pipe (Backward Explicit Congestion Notification) BECN is Extended Setup ( extended set ) used in the setting mode to configure the router, it is more than the basic setting mode enable secret provided in the ciphertext enable password ( in preference to the use plaintext ) service password-encryption of all encryption system cleartext password ( weak ) 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. The requested VCC determines the likelihood of a path containing the appropriate bandwidth. Configuration with multipoint subinterface ASCII American Standard Code for Information Exchange (American Standard Code for Information Interchange) representing character . 8 -bit code, by the seven data bits plus a parity bit. C: 192.168.0.0/24 -- 192.168.255.0/24 AAA- ---- Authentication (Authentication) , authorization (Authorization) and statistics (Accounting) Cisco Bypass mode ( bypass mode ) removes FDDI and Token Ring network operations for an interface . Configure a password for the console port : PPP configuration Topology Bus ( bus topology ) a straight LAN off-line structure, wherein transmission from each station on the network Class C network (C -based network ) portion of the Internet Protocol hierarchical addressing scheme. Class C network has 24 Information, if the information is not updated by the neighbor, the amount of time before it is discarded. By default, this timer is not used for 180 seconds. Aggregation layer : the convergence layer of the access point , can provide routing decisions . Realize the safety filter , the flow control . Remote access . The main device : router . The three-tier architecture of the network : FECN: Forward Explicit Congestion Notice Access-list 100 permit IP any any Port Auxiliary ( auxiliary port ) the Cisco console port on the router backplane, which allows the call routing Fast switching ( fast switching ) that utilizes a route cache to speed up packet switching through a router =========================================================== =============== Sended and is not reliable. Compare connection-oriented . See virtual circuit . The convergence algorithm provides loop-free operation throughout the routing calculation. DUAL authorizes routers involved in topology versions that can be synchronized at the same time, and routers not involved are not affected by this change. See Enhanced IGRP . bridge priority ( bridge priority ) disposed bridge STP priority. By default all bridges take precedence Partial mesh =========================================================== =============== Thus, the switch has exited the switch at the leading edge of the output before the packet is fully entered into the input port. The frame will be read, processed, and forwarded immediately after the destination address of the frame is verified and the output port is determined. The process of OSPF creating neighbors : The sessions command gives the connection from the local router to the remote router. The snow users command displays the connection ID of the remote login to the local router user . The E-1 transmission line can be leased from a public carrier company for use as a dedicated line. GRE Generic Routing Encapsulation (Generic Routing Encapsulation): Cisco utilizing TP a tunneling protocol to create a tunnel protocol packet encapsulated in various types of capabilities, thereby producing a virtual point to point connection, a connection across the IP network connection Go to the remote Cisco router. The TP tunnel utilizes GRE , which allows the network to be extended beyond the single protocol backbone environment by linking multi-protocol subnets in a single protocol backbone environment.