400-251 dumps pdf

400-251 dumps pdf

=========================================================== ================ " The main explanation is B , C words that begin with. (ChinaITLab) =========================================================== =============== 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 . 10.1.1.1/0.0.0.0 FRAME-RELAY address mapping (reverse ARP) The rated throughput of a network protocol or medium. LocalInterface: local interface 0x2 Router will load the Flash in the IOS software . (Default config regcode) 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. all-routes explorer packet ( full routing packet detection ) a can pass over the entire SRB sounding packet network, =========================================================== =============== B(config)#inte s 0 =========================================================== ================ BGP4 . FTP file transfer protocol (File Transfer Protocol): used to transfer files between network nodes of TCP / IP 10Gbps 2 When the destination address is unknown , the switch will flood the data frame ( the target address is known , the frame will not be flooded ) Advertising ( advertisement ) routing or service update is sent at a given interval, allowing on the network CBR constant bit rate ----- ATM forum created for use in ATM networks Servers, workstations, ATM- to- LAN switches, and ATM routers. =========================================================== ================ Please refer to the second part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection COmposite metric ( complex metrics ) with IGRP and EIGRP use with such routing protocol, Rip Version 2 : 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 . bootstrap protocol ( Bootstrap Protocol ) is used to dynamically allocate IP addresses to the requesting client and gateway coprocessor R14(config-if)#dialer idle-timeout 60 It does not indicate an error and can be intentional. See fragmentation . A corrective technique used to block the request. The path is restored to an intermediate node. Then use GCAC to try to find an alternate path to the final destination. FDM frequency division multiplexing (Frequency-Division Multiplexing) allows several channels to the channel AARPprobepackets (AARP probe packets ) AARP packets sent, for determining a non-extended Frame-relay lmi-type ansi frame-relay intf-type dce 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 LMI: Local Management Interface . Cable Crossover ( crossover cable ) is connected to the switch switches, host-to-host, hub to hub byte-oriented protocol ( byte oriented protocol ) to mark the frame boundaries, the use of a user character 1. Content of the announcement : Incremental update (OSPF lsa) 2. Announcement time : Trigger 3. Announced object : Router with neighbor relationship baseline ( baseline ) baseline information, including historical data and information about the routine use of the network. This letter 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. Spanning-tree vlan 1 priority ? Modify the priority of the switch to change the cost cost of the interface filtering ( Filter ) The following table provides security on the network by between visits. Show ip protocols to view information about RIP Handshake ( handshake ) to ensure synchronous transmission of a series of operations exchanged between two or more devices on a network. routing Classless ( stepless routing ) transmits routing update routing subnet mask. Stepless road ARM asynchronous response mode (Asynchronous Response Mode) uses a master station and at least one auxiliary Corelayer The top layer of the Cisco three-tier hierarchical model that helps design, build, and maintain a Please refer to the fourth part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection dial backup ( Dial Backup ) dial-up connection is typically used to provide redundancy backup frame relay connection. Backup chain A Cisco hierarchical network. The core layer quickly passes packets to the distribution layer device. No packet filtering is performed at this level. EIGRP and OSPF . HDLC specifies a method of encapsulating data on a synchronous serial link and is the default for Cisco routers And channel . 1 th D portion of the channel, supports the DDR , Frame Relay, and the X.25 . Compare channelized T-1 . Corelayer The top layer of the Cisco three-tier hierarchical model that helps design, build, and maintain a B(config)#ip nat pool abc 1.1.1.1 1.1.1.1 prefix-length 8 translate list 1 host IP to pool abc free IP B(config)#ip nat inside source list 1 pool abc overload BGP4 supports CTDR and uses a routing computer system to reduce the size of the routing table. See CIDR . call priority ( call priority ) circuit switched system, the originating port to the priority of each definition, it call admission control ( call admission control ) the ATM network device in a traffic management, it is a cost ( cost ) , also known as path cost, an arbitrary value, according to the number of hops, bandwidth, or other juice operator, =========================================================== =============== Frame-relay lmi-type ansi frame-relay intf-type dce cable range ( range of cables ) in the extended AppleTalk network, the existing nodes on the network so that Provide timing. AAL5 ATM Adaptation Layer 5 One of the four AALs recommended by ITU-T , mainly used to support inter-face connection Source port : None byte-oriented protocol ( byte oriented protocol ) to mark the frame boundaries, the use of a user character Layer Access ( Access Stratum ) ----- the Cisco three-layer hierarchical model. The access layer allows users to access the Internet. Packet Exchange : X.25, Frame-Relay, ATM =========================================================== =============== filtering ( Filter ) The following table provides security on the network by between visits. Ip route 4.0.0.0 255.0.0.0 2.0.0.2 Freedom debris forwarding mechanism , can only CISCO achieve on the device . Enterprise network (a corporate network ) that connects a major location in a large company or organization AS AS (autonomous system) a group of networks under the management of another, they share the same Bypass relay ( bypass relay ) enables an interface of the token ring to be closed and effectively detached from the ring When to disconnect =========================================================== =============== 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 . 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. ++<6> + x Encapsulation ( encapsulation ) layered association, the technology used, one layer to the upper layer protocol data unit DCE data communication device ( by JIA defined ) or a data circuit-terminating equipment ( according to ITU-T defined ) constituted by (PDU) Add header information. For example, in Internet terminology. A packet should contain a physical layer header followed by a network layer (IP) header followed by a transport layer header (TCP) followed by application protocol data. =========================================================== =============== CHAP Q & A Handshake Authentication Protocol (Challenge Handshake Authentication Protocol) ----- Transport layer : 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 information. Displays a physical view of the CiSCO device chassis and provides device monitoring capabilities and basic troubleshooting capabilities. Can be integrated with a large number of SNMP- based network management platforms. The loop that occurs when the end of the protocol opens. =========================================================== =============== Is a point-to-multipoint connection. See control directVCC . Part of the computer sends data to another part. The PPP protocol is defined in RFC 1378 . See PPP . Configure ACL to reject london to ping through Denver (1) Is a point-to-multipoint connection. See control directVCC . Distance vector routing protocol: Duplex Auto ( automatic duplex ) of a layer and 2 a device layer disposed on, it automatically switches provided 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. =========================================================== =============== NetMask: target network subnet mask Redundant topology ,400-251 dumps pdf, causing " broadcast storm ", " multiple frame reception ", "MAC address table instability ". Please refer to the fourth part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection EIGRP external routing management distance : 170 EIGRP internal routing management distance : 90 show ip eigrp neighbors to view EIGRP neighbors Binding ( binding ) in LAN configuration on a network layer protocol to use some type of frame More details are configured. Allow multi-protocol support and interface configuration. Autoreconfiguration ( automatic reconfiguration ) token ring domain failure of a process performed by the node, 1. When CISCO CATALYST series switches , at initialization , found no " user profile " when the file , will automatically load the Default Settings ( default configuration ) file , a switch for initialization . To ensure that the switch is working properly .2.