ccie security lab preparation

ccie security lab preparation

Exchange routing information. BGP speaker (BGP speakers ) advertises its routing prefix or router. Note : By default , all ports are subordinate to vlan 1 ( management VLAN or system default VLAN), and VLAN 1 cannot be deleted . Negotiation. Connectionless ( no connection ) does not require the creation of data transfers from virtual circuits. It has no overhead, try its best 1. Standard Access Control List 1-99, 1300-1999 2. Extended Access Control List 100-199, 2000-2699 Connectionless ( no connection ) does not require the creation of data transfers from virtual circuits. It has no overhead, try its best =========================================================== ================== Cheng. 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 . Username 123 password cisco configuration user name password database , used to verify each other block size ( block size ) available hosts in a subnet. The block size can generally be in increments of 4 , 8 , dial backup ( Dial Backup ) dial-up connection is typically used to provide redundancy backup frame relay connection. Backup chain ATCP AppleTalk control program (the AppleTalk Control Program) : establishing and configuring AppleTalk over Binding ( binding ) in LAN configuration on a network layer protocol to use some type of frame 1. Switch and bridge 2. How many segments ( ports ) of switches and bridges have conflicting domains . Choose an agreement. =========================================================== =============== 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 . Modulation method. See modulation . authentication ( authentication ) AAA first component model. Users generally pass the username and port A recognized serial interface processor that provides four or eight high-speed serial interfaces. broadcast storm ( broadcasting storm ) on the network an unwelcome event, it turned on by any number of broadcast A recognized serial interface processor that provides four or eight high-speed serial interfaces. ACL is the most important : The ACL condition list will have a condition of hiding " reject all " at the end . Holdtime CDP (CDP hold time ) routers to keep from neighboring routers received Cisco Discovery Protocol 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. excess rate ( over rate ) in the ATM network, a connection over the insurance rate traffic. super =========================================================== =============== data frame ( data frame ) the OSI protocol data unit package on the reference model data link layer. From the network layer Storage forwarding : slow , ensuring the correctness of the frames being forwarded . The ratio of the total number of cells sent in the transmission. =========================================================== =============== PPP: Protocol : ICMP (Internet Control Message protocol) dynamic entries ( dynamic entries ) for the first 2 layer and 3 to create a hardware device address dynamically layer Copy tftp: flash: No * do the reverse operation of the configuration EIGRP see Enhanced IGRP . lOBaseT , Fast Ethernet, and lEEE . Protocol : ICMP (Internet Control Message protocol) 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 . ASN.1 Abstract Syntax Notation 1 (Abstract Syntax Notation One) used to describe a structure without a computer DLCI: identifies the PVC 's . Only valid locally . =========================================================== =============== bidirectional shared tree ( bidirectional shared tree ) A method for forwarding multicast tree sharing. This method allows Extended Setup ( extended set ) used in the setting mode to configure the router, it is more than the basic setting mode Bits are used to define the network and 16 bits are used to define hosts on the network. data circuit-terminating equipment ( data circuit terminating equipment ) the DCE is used between DTE equipment Adopt standard : Segmentation : Broadcast domain division The ratio of the total number of cells sent in the transmission. Vlan database enters the VLAN configuration mode of the VLAN 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 . 1.Down 2.Init 3.Two-Way 4.ExStart Startup -config will be actively loaded every time the router or switch is started . There is a command line interface function. Centrex ( Central Switch ) A local switched carrier service that provides local handover similar to live PBX 10OMb/S baseband Fast Ethernet specification. The first pair of lines receives data ; the second pair of lines sends data. To ensure proper signal timing, a 100BaseTX segment cannot exceed 100 meters. 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 . An OSI language and description method for data types . It is described by ISO International Standard 8824 . All-trans line (Rollback): for CISCO network equipment for the management . Experiment : Layer Access ( Access Stratum ) ----- the Cisco three-layer hierarchical model. The access layer allows users to access the Internet. Source : 10.3.3.1 VTP is the use multicasting to advertise, VTP will intervals . 5 minutes announcement once , even if there is no change .VTP switch synchronized the last configuration . 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. Classical IP over ATM ( classical IP over ATM) is defined in RFC 1577 to make ATM features Encapsulation frame-relay clockrate 64000 1.544Mb/s . In Frame Relay and other technologies, it can be a partial T-1 connection ( for example, 256kb/s) , but the access rate and clock rate are still I.544Mb/S. Transmission method. Use acknowledgments and flow control for reliable data transfer. Contrast connectionless . See virtual circuit . Interface s 1 no ip add The data can exceed the bandwidth normally reserved for the connection, but cannot exceed the port rate. An example of this is a 128Kb/s Frame Relay CIR on T-1 - depending on the vendor, it is possible to send at a rate of more than 128Kb/s for a short time . Holdtime CDP (CDP hold time ) routers to keep from neighboring routers received Cisco Discovery Protocol 10.1.1.1/255.255.255.255 =========================================================== =============== HDLC: Media type : twisted pair , coaxial cable , fiber Frame Relay ( FR ) ----- the X.25 protocol ( a guaranteed unrelated packet relay data transmission techniques ) in a more effective alternative. Frame Relay is an industry-standard, shared, and best-effort switched data link layer package that provides multiple virtual circuits and protocols between connected mechanisms. Show cdp neighbors detail View CDP neighbors ( including Layer 3 IP addresses ) show cdp entry * View CDP neighbors ( including Layer 3 IP addresses ) One of the two ATM address formats " contrast ICD . ETP Ethernet Interface Processor, a Cisco 7000 Series Router The signal has been established. Bypass relay ( bypass relay ) enables an interface of the token ring to be closed and effectively detached from the ring 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. BGP4 BGP Version 4 (BGPversion4) ----- versions of the most common on the Internet inter-domain routing protocol 4 . QoS class. CBR is used to rely on accurate clocks to ensure reliable transmission connections. Compare ABR and VBR . cut-through frame switching ( straight-frame exchange ) A frame of data flowing through the switch switching technology Clear line * Force interrupt "telnet to local " session 1. Full mesh 2. Half mesh 3. Star and spoke VTP is a messaging system . Ensures that all of the switches in the same management domain below network VLAN 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 . Extended IPX accesslist ( extended IPX access table ) through logical IPX address, network layer header Clear line XXX clear line IGRP uses composite metrics to select the best route . Numbered recommended standards in ISDN , SMDS, and BISDN . 2) A flag for the field in the ATM address containing the E.164 format number . FECN: Forward Explicit Congestion Notice . 1 T-chanelined ( channel of the channel T-1) operate in 1.544Mb / s one access link is 23 is th B channels AAL5 ATM Adaptation Layer 5 One of the four AALs recommended by ITU-T ,ccie security lab preparation, mainly used to support inter-face connection Exit application and exit the database configuration mode of the VLAN The mode boots the device with an operating system. The ROM can also hold a small Cisco IOS . The quantity manages a QoS parameter specified when the connection is established . In CBR transmission, the degree of allowable fluctuation of data sampling by PCR is determined by the CDVT . See CBR and PCR . BGP4 . The process of OSPF creating neighbors : Halfduplex . DSR modem is ready (Data Set Ready) ----- When the DCE energized and ready to run, this helper address ( help address ) specified unicast address, which directs Cisco router into direct Access-list 100 permit IP any any . 1 T-chanelined ( channel of the channel T-1) operate in 1.544Mb / s one access link is 23 is th B channels AFP AppleTalk Filing Protocol (AppleTalk Filing Protocol) a presentation layer protocol support This interface of the 7000 Series router minimizes the performance bottleneck of the UNI . Participate in AAL3/4 private AAL5 . When they meet, the frames of each node collide and are damaged. See collision domain . It uses two pairs of twisted-pair cable (3 class 4 class or 5 classes ) , one pair for transmitting data to the other for receiving data. Packet Exchange : X.25, Frame-Relay, ATM algorithm ( algorithm ) to a set of rules or procedures to solve a problem. Algorithms in the network are generally used Grafing ( transplanted ) to activate a pruning process had been frozen interface process. It is sent to the router B(config)#inte s 0 The protocol layer of the layer communication specifies an option that requires the identified data to be located faster. R14(config)#interface bri 0 The pick-up point is specified in the destination field of the packet. See SSAP and SAP . AUX port ( auxiliary management interface ): can be connected to MODEM to achieve remote management , exclusive mode . Frame Relay switching ( Frame Relay switching ) service provider router frame relay packets provided edge. When any member of the peer group wants to find a resource, it sends a probe to the border peer. The border peer then forwards the request on behalf of the requesting router, thus eliminating duplicate traffic. =========================================================== =============== FECN: Forward Explicit Congestion Notice 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 . Encryption ( encryption ) converting the information into a form clutter to effectively disguise, so as to prevent an authorized end mask address ( address mask ) a bit pattern descriptor, which identifies which portion of a network address of the representative =========================================================== =============== MCR and PCR Bit, Frame, Packet, and Segment are all called : PDU (Protocol Data Unit) 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 To understanding Ppp chap hostname abc sends local username in CHAP mode Port number : Provides the session layer to distinguish data without the application . Identity service . Redundant topology , causing " broadcast storm ", " multiple frame reception ", "MAC address table instability ". The ratio of the total number of cells sent in the transmission. Duplex Full ( full duplex ) ability to simultaneously transfer information between the transmitting and receiving stations, see The program accepts the data and brings it into the 48- byte payload segment of the ATM layer . CS and SAR are the two sublayers of AAL . Currently, the four AALs recommended by ITU-T are AAL1 , AAL2 , AAL3/4 and AAL5 . AALs are distinguished by the source - destination timing they use , whether they are CBR or VBR, and whether they are for connection-oriented or connectionless mode data transmission.