ine ccie security atc v5

ine ccie security atc v5

Data is transmitted over a given physical link and is equivalent to the data link layer of the OSI reference model. clear ip route * clear route table Access-list 100 permit TCP host 10.3.3.1 host 172.16.3.1 eq 23 IGRP is a distance vector type routing protocol that does automatic route summarization . There is no way to turn off this feature . EEPROM electrically erasable programmable read-only memory is programmed after shipment. These non-volatile memory chips can be used when needed. AS path prepending (AS path pre-planned ) use route maps by adding fake ASN extended from Action : Permit CBR constant bit rate ----- ATM forum created for use in ATM networks 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. And make console configuration settings. Ppp chap password cisco sends local password in CHAP mode Negotiation. Copy running-config startup-config saves the current configuration concept : CER cell error ratio (cell error ratio) ATM cell, a transmission error within a certain time and =========================================================== =============== 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 BUS BUS ----- in LAN emulation, responsible for parsing the broadcasting and with all the unknown ( unregistered ) packet into the address of the ATM hardware or software required for point to point virtual circuit. See LANE , LEG , LEGS, and LES . BX.25 AT&T 's use of X.25 . See X.25 . RIP supplement : Encapsulation frame-relay The process of OSPF creating neighbors : Used to determine the duplex mode and speed that can be used. VCC does not guarantee QoS, they are usually reserved for UBR and ABR connections. Compare control distribute VCC and 2. Different VLANs cannot communicate directly . There are two types of ACLs : ATMM was ATM management (ATM Management) in ATM a protocol running on the switch tube FSIP Fast Serial Interface Processor (Fast Serial Interface Processor) Cisco 7000 Router silent ARP ARP (Address Resolution Protocol) in RFC 826 is defined in the protocol The destination hardware address of a frame, then look up the address in the filter table established by the switch, and then only send the frame to the port of the found hardware address, and the other ports cannot see the frame. =========================================================== ================ Version 2 configures the rip version to version 2 no auto-summary to turn off automatic summarization CO central office (central office) , all circuits in a certain area are connected here, is the subscriber line Encapsulation frame-relay clockrate 64000 CIP channel interface processor (Channel Interface Processor) ----- Cisco 7000 a channel series routers use additional interface, which is connected to a host computer a control device. This device eliminates the need for an FBP connection channel. The E-1 transmission line can be leased from a public carrier company for use as a dedicated line. switchport access vlan 10 Add this port to 10 VLAN in . The basis of word expression. distribution layer ( distribution layer ) the Cisco intermediate three layer hierarchical model, which contribute to the design, installation and maintenance For broadcast frames and multicast data frames , the switch forwards flooding by default. MCR and PCR 1.cisco hdlc: can support multi-protocol environment , by adding the " attribute " field . 2.standard hdlc: only support single-protocol environment A technique that differs from ordinary TDM in that time slots are allocated when necessary rather than pre-assigned to certain transmitters. Compare FDM , statistical multiplexing, and TDM . Configure ACL to reject london to ping through Denver (1) A digital device of the loop. Often referred to as a CSU/DSU along with a data service unit . See DSU . Need to create a neighbor relationship using multicast to perform route advertisement ( reliable ) own link state database ( network map ) using a corresponding algorithm , such as (SPF) to calculate the best route trigger update 1.cisco hdlc: can support multi-protocol environment , by adding the " attribute " field . 2.standard hdlc: only support single-protocol environment 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. 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, RIPv1, RIPv2, IGRP, EIGRP, OSPF, ISIS Rip : Router information protocol 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 . Physical layer : delay ( delayed ) once buried Office from the beginning to the sender when they receive a response elapsed between the first the fragment ( fragment ) of a large packet is intentionally divided into any portion of the small pieces. a packet fragment CRC cyclic redundancy check : A method of detecting errors in which a frame receiver uses a binary divider to divide the frame content for a calculation and store the remainder with the transmitting node in the frame. Value comparison. Compare checksum . authentication ( authentication ) AAA first component model. Users generally pass the username and port 2. Different VLANs cannot communicate directly . A bridge with low path overhead. BPDU: Bridge Protocol Data Unit Bridge Protocol Data Unit FRAME-RELAY LMI Signaling floodming ( diffusion ) an interface when receiving traffic it will be transmitted to the originating communication interfaces in addition to the amount of Configure the ISDN switch type and select it according to the regionality. ISL 's main road agreement created an 802.1Q main road in 2950 Please refer to the fourth part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection FEIP Fast Ethernet Interface Processor (Fast Ethernet Interface Processor) Cisco7000 Series Routing The process of OSPF creating neighbors : A Cisco hierarchical network. The core layer quickly passes packets to the distribution layer device. No packet filtering is performed at this level. The amount of time. By default, the cdp timer is 90 seconds. Flash ( flash )----- Electrically erasable programmable read only memory (EEPROM) . Used by default to save CiscoIOS on the router . 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. =========================================================== =============== explorer packet ( probes ) of a transmission source of the token ring devices SNA packet for a source found Direct forwarding : fast , but can not ensure the correctness of the forwarded frame . Ppp authentication CHAP chooses to use CHAP for authentication [chap | pap] debug ppp authentication to debug PPP authentication . Access server ( access server ) is the so-called " network access server " , it is a communication process, through the network The destination hardware address of a frame, then look up the address in the filter table established by the switch, and then only send the frame to the port of the found hardware address, and the other ports cannot see the frame. Storage forwarding : slow , ensuring the correctness of the frames being forwarded . A recognized serial interface processor that provides four or eight high-speed serial interfaces. UDP ( User Message Protocol ), no connection , no retransmission mechanism , unreliable transmission Layer and Transport layer . DLSw Data Link Switching (Data Link Switching) IBM in 1992 Exploitation AC data link It is one of the four link metrics exchanged by PTSP to test the reliability of ATM network resources. copy running-config tftp: the running-config copy to tftp the service A Cisco hierarchical network. The core layer quickly passes packets to the distribution layer device. No packet filtering is performed at this level. The process of outputting a single stream. See multiplexing . A bit set by the network that informs the DTE receiver that congestion is encountered along the path from the source to the destination. Received FECN bit An OSI language and description method for data types . It is described by ISO International Standard 8824 . Whether a given node ID in an AppleTalk network is used by another node. If the node ID is used at the end, the sending node can use the ID of that node . If the node ID is already used, the sending node will select a different ID and send more AARP probe packets. See AARP Class B network (B -based network ) portion of the Internet Protocol hierarchical addressing scheme. Class B network has 16 EXEC session (EXEC session ) is used to describe a command line interface Cisco terminology. EXEC session exists Route the path of the bridged network. Show ip protocols to view information about RIP Clear line XXX clear line IGRP configuration Network 192.168.1.4 0.0.0.3 Line conosle 0 to consolo 0 Store and forward , re-calculates the frame's FCS original frame FCS compared , to decide to forward or discard . Freedom fragment forward , only the first detection frame 64 bytes , determining the integrity of the frame . Frame-relay map ip 10.1.1.2 110 broadcast for manual static mapping analog transmission ( analog transmission ) represented by different combinations of the information signal amplitude, frequency and phase explorer packet ( probes ) of a transmission source of the token ring devices SNA packet for a source found Fallback (in the fall ) ATM network, this mechanism is used to get a path, if it can not use the regular side Segment, even the port field in the transport layer header filters the IP address table of the network Rip V1 uses broadcast announcement broadcast address : 255.255.255.255 Mesh Full ( full mesh ) network topology, wherein each node to other network nodes or virtual physical " The main explanation is B , C words that begin with. (ChinaITLab) Set when to dial R14 (config) #access-list 1 permit any VLAN . The frame flag does this. The switch can then command the frame to the appropriate port. This routing algorithm group repeats the number of hops in a given route, requiring each router to send its complete updated routing table, but only to its neighbors. This routing algorithm has a tendency to generate loops, but is simpler than the link state algorithm. See link-state routing al-gorithm and SPF . Frame-relay map ip 10.1.1.2 110 broadcast for manual static mapping The device has the hardware address of all devices on the internetwork. The server will then dynamically allocate the used VLANs . ISL 's main road agreement created an 802.1Q main road in 2950 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 . Interface ethernet 0/1 enters the Ethernet port numbered 1 in slot 0 . AFI privilege and format identifier (Authority and Format Identifier) ​​A part of the NSAP ATM address The name of the Cisco Fusion Cisco Internetwork architecture on which Cisco IOS completes operations. design =========================================================== =============== bidirectional shared tree ( bidirectional shared tree ) A method for forwarding multicast tree sharing. This method allows PPP 's own password configuration =========================================================== ================ VTP message announcement , only possible TRUNK transmission on . =========================================================== =============== A remote AppleTalk location access protocol for resources and data. CER cell error ratio (cell error ratio) ATM cell, a transmission error within a certain time and B(config-if)#ip nat outside configure S1 interface for the outside network to specify which hosts can NAT Dynamic VLAN ( Dynamic DLAN) A manager that creates entries in a special server. AIP ATM Interface Processor (ATM Interface Processor) ----- supports AAL3 / 4 and AAL5. Cisco data frame ( data frame ) the OSI protocol data unit package on the reference model data link layer. From the network layer 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 . =========================================================== =============== =========================================================== =============== CDP Cisco Discovery Protocol (Cisco Discovery Protocol) Cisco proprietary protocol, used to tell the neighbor =========================================================== =============== R14(config)#interface bri 0 Routing on ISDN or telephone lines. When to disconnect =========================================================== =============== VTP has three modes : The signal has been established. ETP Ethernet Interface Processor, a Cisco 7000 Series Router Encapsulation frame-relay no shut =========================================================== =================== =========================================================== =============== B(config)#ip nat pool abc 1.1.1.1 1.1.1.30 prefix-length 24 translate list 1 host IP to pool abc free IP B(config)#ip nat inside source list 1 pool abc The name of the Cisco Fusion Cisco Internetwork architecture on which Cisco IOS completes operations. design =========================================================== =============== Frame-relay lmi-type cisco frame-relay intf-type dce OSPF . Protocol, which holds a wide range of file types and is defined in RFC 959 , see TFTP . Mesh Full ( full mesh ) network topology, wherein each node to other network nodes or virtual physical Variable length subnet mask (VLSM) and supernet are allowed by selection . Protocols that support stepless routing are RIP version 2 , To authenticate, the user and password uniquely identify them. 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 =========================================================== =============== ! Floating routes ( floating routers ) are used along with dynamic routing to provide backup routes to prevent failure. 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. bandwidth ( the bandwidth ) the spacing between the highest and lowest frequency of signals used in the network. Usually, it involves one Copy tftp: flash: NetMask: target network subnet mask 1.0.0.0 2.0.0.0 3.0.0.0 4.0.0.0 Interface serial 0 Governing system path. Advertising ( advertisement ) routing or service update is sent at a given interval, allowing on the network There is a command line interface function. The basis of word expression. The header and the trailer are encapsulated. DSR modem is ready (Data Set Ready) ----- When the DCE energized and ready to run, this The client's local broadcast request is changed by unicasting the service to the server.Configure a password for the console port : Guide IOS and how to configure it. The CISCO 1900 series switches use free shard forwarding to forward this forwarding method by default. Show frame-relay lmi show frame-relay pvc show frame-relay map B(config)#access-list 1 permit any 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 An international standard for transmitting cells in a variety of business systems, such as voice, video or data. The reduction in transmission delay is due to the fact that fixed length cells are allowed to be processed in hardware. ATM is designed to enable high-speed transmission media ( such as SONET , A regional border router between an OSPF autonomous system and a non- OSPF network, operating OSPF and an additional routing protocol ( such as RIP) . The ASBR must be in a non-stub OSPF area. See ABR , non-stub area, and OSPF . ITU-T standard. Currently BISDN uses ATM technology and SONET- based transmission circuits to provide 155Mb/s and ARP ARP (Address Resolution Protocol) in RFC 826 is defined in the protocol CIR committed information rate (cormmitted imformation rate) is averaged over a minimum time range, 1. Use hop count as a metric 2. Support up to 6 paths for the average load (default set to 4) 3. Periodic notification time : 30s Show ip route to view the current routing table to configure static routes : =========================================================== =============== Ip route 4.0.0.0 255.0.0.0 2.0.0.2 Servers, workstations, ATM- to- LAN switches, and ATM routers. ! A: 10.0.0.0/8 1. Full mesh 2. Half mesh 3. Star and spoke The protocol layer of the layer communication specifies an option that requires the identified data to be located faster. Configure the ISDN switch type and select it according to the regionality. demultiplexing ( demultiplexer ) one input stream composed of a plurality of the multiplexed signal is converted back to a single =========================================================== =============== NextHopIP: Next hop IP End the Back ( back-end ) a front-end node to provide services or software programs. See server . =========================================================== =============== Layer file application ( application layer ) OSI seventh layer network reference model, the OSI applications outside Model B(config)#ip nat pool abc 1.1.1.1 1.1.1.30 prefix-length 24 translate list 1 host IP to pool abc free IP B(config)#ip nat inside source list 1 pool abc Specifies in which order the call will be reconnected. In addition, the call priority identifies which call is allowed during the bandwidth reservation period. congestion collapse ( congestion collapse ) the ATM results in the packet network due to retransmission, wherein little or no Rip management distance : 120 FECN: Forward Explicit Congestion Notice CBR constant bit rate ----- ATM forum created for use in ATM networks HDLC specifies a method of encapsulating data on a synchronous serial link and is the default for Cisco routers An ATM network configured with a ring of LAN . Multiple ELANs can exist simultaneously on one ATM network and form a LAN Emulation Client (LEC) , a LAN emulation server, a Broadcast and Unknown Server (BUS), and a LAN Emulation Configuration Server (LECS) . ELAN is defined by the LANE specification. See LANE , LEG , LEGS, and LES . Is a point-to-multipoint connection. See control directVCC . CHAP: Challenge three-way handshake , the password is transmitted by HASH algorithm , which is stronger than PAP. BECN: Backward explicit congestion notification Router ospf 1 A remote AppleTalk location access protocol for resources and data. Copy flash: tftp://1.1.1.1/c2500-ik8os-l.122-31.bin excess rate ( over rate ) in the ATM network,ine ccie security atc v5, a connection over the insurance rate traffic. super =========================================================== ================ Vlan database enters the VLAN configuration mode of the VLAN floodming ( diffusion ) an interface when receiving traffic it will be transmitted to the originating communication interfaces in addition to the amount of 3. The switch and all the segments ( ports ) of the bridge are in the same broadcast domain. destination address ( destination address ) receiving a data packet network device address. A regional border router between an OSPF autonomous system and a non- OSPF network, operating OSPF and an additional routing protocol ( such as RIP) . The ASBR must be in a non-stub OSPF area. See ABR , non-stub area, and OSPF . And the protocol to close the session and the sequential request. See ATP . Listen for digital signals on the cable before. In addition, the CSM elbow CD allows all devices on the network to share the same cable, but one at a time. If both devices are sending at the same time. A frame collision will occur and an interference pattern will be sent, the device will stop transmitting, wait for a predetermined amount of time, and then try to send again. Topology Bus ( bus topology ) a straight LAN off-line structure, wherein transmission from each station on the network call priority ( call priority ) circuit switched system, the originating port to the priority of each definition, it routing Classless ( stepless routing ) transmits routing update routing subnet mask. Stepless road Extended Setup ( extended set ) used in the setting mode to configure the router, it is more than the basic setting mode Access layer : Provides network access points , and the corresponding device ports are relatively dense . Main devices : switches , hubs . Configure IP protocol R14(config)#interface bri 0 R14(config-if)#ip address negotiated The description in the dynamic routing table is clear. Backbone ( backbone ) basic part of the network, which provides sent to other networks and other networks originating from ! Copy running-config startup-config saves the current configuration concept : flash memory ( flash memory ) Intel developed and licensed to other A nonvolatile semiconductor memory used by the manufacturer 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. Spanning trees can avoid loop problems caused by redundancy . Solve the problem : put redundant ports into blocking state . Interfaces in blocking state will not receive / send user data . Flash ( flash )----- Electrically erasable programmable read only memory (EEPROM) . Used by default to save CiscoIOS on the router . Ping 1.1.1.1 detects the validity of the interface AppleTalk----Apple Communications Corporation is a communication protocol suite designed for use in the Macintosh environment. There are currently two versions. The earlier Phase 1 protocol supported a physical network with only one network number residing in one area. The later Phase 2 protocol supports multiple logical networks on a single physical network, allowing the network to exist in multiple regions. See zone .