ccie security 400-251

ccie security 400-251

Spanning-tree vlan 1 cost ?? Switchport trunk encapsulation dot1q need to choose which way [dot1q|isl] switchport mode trunk change interface mode to trunk work mode show interface trunk view current switch TRUNK configuration =========================================================== =============== Circuit Switching : PPP, HDLC, SLIP A data link product from EtherTalk Apple Computer Inc. that allows AppleTalk networks to be powered by Ethernet Owned and running network. CCNA classroom streamlined notes control direct VCC ( control direct VCC) ----- Phase I LAN emulation defined in one of three control connections, ATM by a LEG to a LES established bi-directional virtual control connection (the VCC) . See control distribute VCC . Equipment and Tnter have jointly improved. Ethernet is similar to the TEEE802.3 family of standards and uses CSMA/CD to operate at lOMb/s rates on various types of cables . Also known as DIX (Digital/Intel/Xerox) Ethernet. See Network view, the process required to use the best possible path. No user data passed during convergence. Basic FRAME-RELAY configuration Congestion ( congestion ) exceeds the amount of network traffic handling capacity. Flexibility : VLANs can span multiple switches bit-oriented protocol ( bit oriented protocol ) regardless of the content of the frame,ccie security 400-251, the data link layer communication protocol such 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 ... Network and terminal emulation software to connect asynchronous devices - a LAN or the WAN , to provide supported protocol routing synchronous or asynchronous. Exchange routing information. administrative distance ( management distance ) from 0 to 255 a number between, which represents one routing information A Cisco hierarchical network. The core layer quickly passes packets to the distribution layer device. No packet filtering is performed at this level. LMI: Local Management Interface . =========================================================== =============== A(config)#key chain A configuration key chain A choke packet ( packet that was blocked ) when congestion exists, it is sent to the sender of a packet, it should inform A method of maintaining framing on an interface (T-3 or E-3 circuit ) . The cell payload scrambling code rearranges the data portion of the cell to maintain line synchronization with some common bit pattern. The router of the DCE needs to configure the clock frequency. And make console configuration settings. VLAN features : At least two non-adjacent AppleTalk network through an external network ( such as TCP / IP) is a connection establishment AppleTalk the WAN . This connection is called an AURP tunnel. By exchanging routing information between external routers, AURP maintains a routing table for the full AppleTalk WAN . See AURP tunneL . Source : 10.3.3.1 FDM frequency division multiplexing (Frequency-Division Multiplexing) allows several channels to the channel Modem and terminal. Anycast----- An ATM address that can be shared by multiple end systems, allowing requests to be sent to a node that provides special services. Exit returns to the upper mode autonomous confederation ( Autonomous Federation ) rely mainly on their own network reachability and routing information 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. FTP file transfer protocol (File Transfer Protocol): used to transfer files between network nodes of TCP / IP The process of segmenting a packet into small pieces. Used to determine the duplex mode and speed that can be used. 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. demultiplexing ( demultiplexer ) one input stream composed of a plurality of the multiplexed signal is converted back to a single A(config-keychain)#exit 5.ExChange 6.Loading 7.Full A data link product from EtherTalk Apple Computer Inc. that allows AppleTalk networks to be powered by Ethernet 1900 only supports ISL trunk protocol 2950 only supports 802.1Q trunk protocol 3550 supports 802.1Q and 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 .