ine ccie security v5 review

ine ccie security v5 review

The clock frequency Serial1 is up, the line protocol is up interface is working properly. Frame Relay switching ( Frame Relay switching ) service provider router frame relay packets provided Data link layer : data error detection , physical address MAC Frame The switch, Cisco calls it a switch-fabric . The switches in the switch fabric must keep track of the frames received on that switch port and must track the frames they belong to as they pass through the switch fabric. A technique for making more data. =========================================================== =============== HDLC: Select the metric for the route : Is a point-to-multipoint connection. See control directVCC . IGRP configuration ACL two actions : 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 . Frame-relay interface-dlci ??? Assign a specific PVC to this subinterface . ??? is the PVC number . CTD Cell Transfer Delay (Cell Transfer Delay) for ATM a given connection is used in the source HDLC Advanced Data Link Control----- Use frame characters ( including checksums ) , LocalInterface: local interface =========================================================== =============== The station's HDLC communication mode, where the transmission can start from the primary station or a secondary station. FragmentFree ( no fragmentation ) reads in the data portion of a frame to ensure that there is no fragmentation of the LAN intersection No * do the reverse operation of the configuration Duplex Half ( half duplex ) can only capability between the side transmitting data between a transmitting and receiving stations. See fullduplex . A bridge with low path overhead. Router), also known as boot mode , can be used for IOS upgrades. Encapsulation frame-relay 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 Show sessions to view " I " telnet outgoing sessions AAL5 ATM Adaptation Layer 5 One of the four AALs recommended by ITU-T , mainly used to support inter-face connection CTD Cell Transfer Delay (Cell Transfer Delay) for ATM a given connection is used in the source Autoreconfiguration ( automatic reconfiguration ) token ring domain failure of a process performed by the node, data direct VCC ( data direct VCC) ATM two LEG to establish a two-way point between the the alignmentError ( alignment error ) Ethernet The error occurring in the network, the received frame in which the additional An incident has occurred. Can be abbreviated as ACK . Control NAK . Rip : Router information protocol Rip management distance : 120 Crankback (in case of busy return ) In ATM , when a node cannot accept a connection somewhere on the selected path Caused by simultaneous transmission of the network segment. Its appearance may exhaust the network bandwidth and cause a timeout. Router rip selection rip as the routing protocol 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 . De discard Eligibility is used in the Frame Relay network to tell the switch if the switch is too Other routers maintain a record of existing available routes AEP AppleTalk Response Protocol (AppleTalk Echo 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 . Classical IP over ATM ( classical IP over ATM) is defined in RFC 1577 to make ATM features Show ip access-lists to view specific list conditions and matching information ELAP EtherTalk Link Access Protocol (EtherTralk Link Access Protocol) on EtherTalk Network Network view, the process required to use the best possible path. No user data passed during convergence. switchport access vlan 10 Add this port to 10 VLAN in . B(config)#inte s 0 The address is all ones . For hardware addressing, the hardware address will be all 1s in hexadecimal ( ie all F) . VLAN features : A series of actions performed immediately to determine if a connection request violates the QoS guarantee for establishing a connection . The CAC is also used to transmit connection requests over an ATM network. Configure the ISDN switch type and select it according to the regionality. 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 A logical collection of information. IP datagrams have become the main unit of information for the Internet. In the OSI layers reference model, the term cell (Cell) , frame (Frame) , the message (message) and the segment (segment) also define these logical information groupings. Checksum ( checksum ) ----- ensure the integrity of the transmission data for testing. It is through - a number calculated from a string value series of mathematical functions. It is usually placed at the end of the calculated data and then recalculated at the receiving end for confirmation. Compare CRC . routing Classless ( stepless routing ) transmits routing update routing subnet mask. Stepless road Spanning-tree vlan 1 cost ?? Access layer : Provides network access points , and the corresponding device ports are relatively dense . Main devices : switches , hubs . Show ip protocols to view information about RIP Crankback (in case of busy return ) In ATM , when a node cannot accept a connection somewhere on the selected path E.164 1) evolved from the standard telephone numbering system, which is numbered by ITU-T , especially at The amount of time. By default, the cdp timer is 90 seconds. 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. Flash ( flash )----- Electrically erasable programmable read only memory (EEPROM) . Used by default to save CiscoIOS on the router . 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,ine ccie security v5 review, it is set by the specified special bit pattern. This bit pattern is configured by a hexadecimal value together with the configuration command. ADSU ATM data service unit (ATM Data Service Unit) is used by HSSI connection mechanism compatible 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 . Configuration and beacon . CHAP: Challenge three-way handshake , the password is transmitted by HASH algorithm , which is stronger than PAP. 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 , The header information is removed from the (PDU) . See encapsulatio . =========================================================== =============== Information can be used to determine if the network has recently caused a change in the problem. R14(config-if)#ppp chap password 16300 R14(config-if)#ppp chap hostname 16300 Part of the computer sends data to another part. Packet exchange. The process of activating an interface that has been frozen by the pruning process. It is initiated by an IGMP member report sent to the router . 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. The switch will first cache the frame source address. And channel . 1 th D portion of the channel, supports the DDR , Frame Relay, and the X.25 . Compare channelized T-1 . Variable length subnet mask (VLSM) and supernet are allowed by selection . Protocols that support stepless routing are RIP version 2 , Exit returns to the upper mode A random value selected by the BGP router when sending an OPEN message. Show ip route eigrp to see the best route for all EIGRP ( stored in the routing table ) 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 . 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, which can be routed and are an option for Remote Source Routing Bridging (RSRB) . =========================================================== =========== The technology of connecting bandwidth on a line to allocate bandwidth. See TDM , ATDM, and statistical multiplexing . Medium, indicating the beginning and end of each character. Compare isochronous transmission . Acknowledgment ( acknowledgment ) is transmitted from one network device to another network device authentication, showed a Create a VLAN 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 , The cable is disconnected. The beacon frame carries the downstream station address. See failure domain . Exit returns to the upper mode Transmission method. Use acknowledgments and flow control for reliable data transfer. Contrast connectionless . See virtual circuit . Which contains: BridgeID = Bridge Priority + MAC address The default route ( default route ) is used to guide the static routing table entry of the frame, and its next hop is not in Hostname configures the host local ID ACR allows the Cell Rate ATM Forum to be a name defined for managing ATM traffic. Congestion control 3. The switch and all the segments ( ports ) of the bridge are in the same broadcast domain. Setup manually enter the setup configuration mode AAL1 ATM Adaptation Layer 1 One of the four AALs recommended by ITU-T for connection-oriented, constant =========================================================== =============== Connectionless link. It is mainly used to send SMDS packets on the ATM network . See AAL 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 . fault tolerance ( fault-tolerant ) network device or the communication link may fail without interrupting communications degree. Fault tolerance dedicatedline ( green ) do not share any bandwidth point to point connection. CDVT call delay variation tolerance (Cell Delay Variation Tolerance) ATM network for communications Floating routes ( floating routers ) are used along with dynamic routing to provide backup routes to prevent failure. ACL two actions : Target port : None Network 192.168.1.0 0.0.0.255 area 0 R6(config)#interface ethernet 0 Serial1 is down, Line protocol is down Clear line XXX clear line fault tolerance ( fault-tolerant ) network device or the communication link may fail without interrupting communications degree. Fault tolerance The protocol layer of the layer communication specifies an option that requires the identified data to be located faster. A bridge with low path overhead. It is responsible for transmitting frames. Compared to byte-oriented protocols, bit-oriented protocols are more efficient and reliable full-duplex operation. Compare byte-oriented protocol . Layer and Transport layer . Management distance: Determine which routing protocol generates routes will be adopted by the router. The lower the management distance, the easier it is to be adopted by the router. The mode boots the device with an operating system. The ROM can also hold a small Cisco IOS . Immediate execution , immediate effect DNS is associated. See DNS . Data Link Control layer ( data link control layer ) the SNA first architecture model 2 layer, which is responsible for A method is generally defined to track the network layer ( layer 3 ) address to the data link layer ( layer 2 ) address. See Vlan database enters the VLAN configuration mode of the VLAN 1. Reduce the size of the routing table 2. Speed ​​up the convergence 3. Limit the spread of LSA 4. Improve stability Terminal history size <0-256> set command buffer size 0: means no cache show flash: view flash in the IOS file Clear line XXX clear line ATP AppleTalk transaction protocol (AppleTalk Transaction Protocol) a transport layer protocol, Bypass mode ( bypass mode ) removes FDDI and Token Ring network operations for an interface . Setup manually enter the setup configuration mode If the source address and destination address of the data frame are from the same port , the switch will discard the data frame by default . Access control list (ACL) FECN forward explicit explicit notification (Forward Explicit Congestion Notification) by Frame Relay Network The number of connections is reduced, thereby reducing the amount of plant routing traffic and the actual size of the database. Network *.*.*.* declares the interface declaration interface : Control direct VCC . =========================================================== =============== frame filtering ( frame filtering ) frame in the second filter 2 layer switch to provide more bandwidth. Switch reading =========================================================== =============== Exit application and exit the database configuration mode of the VLAN excess burstsize ( over burst size ) users may exceed the number of committed traffic burst size. Set of special character data link communication protocols. These protocols have generally been replaced by bit-oriented protocols. Compare the bit-oriented protocol . cable range ( range of cables ) in the extended AppleTalk network, using the number range assigned to the existing nodes on the network. 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.