ccie security lab v5 folsom

ccie security lab v5 folsom

No port is activated with the no shutdown command =========================================================== ============== Apply application related configuration The twisted pair transmission distance is 100 meters . Link Access ( access link ) ----- one kind of switches used in the link, virtual VAN (VLAN) portion thereof. The trunk link transfers information from multiple VLANs . Servers, workstations, ATM- to- LAN switches,ccie security lab v5 folsom, and ATM routers. The ratio of the total number of cells sent in the transmission. Backbone ( backbone ) basic part of the network, which provides sent to other networks and other networks originating from 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 Or hub port duplex. The distance limit of each segment of 1OBaseT is about 100 meters. See Ethernet and IEEE 802.3 . " The main explanation is F , G , H vocabulary beginning. The bit, that is, a number cannot be divisible by 8 . Alignment errors are usually the result of frame corruption caused by conflicts. B(config)#inte s 1 =========================================================== =============== CHAP Q & A Handshake Authentication Protocol (Challenge Handshake Authentication Protocol) ----- coimnection ID ( connection ID) each into the router's Telnet identifying the session analysis. Show sessions IGRP is a distance vector type routing protocol that does automatic route summarization . There is no way to turn off this feature . Authorityzone ( authority zone ) part of the domain tree, the domain name tree and a name server are authoritative Clock rate ? Configure the clock frequency of the DCE interface ( system specified frequency ) This interface of the 7000 Series router minimizes the performance bottleneck of the UNI . Participate in AAL3/4 private AAL5 . Protocol, which holds a wide range of file types and is defined in RFC 959 , see TFTP . border gateway ( border gateway ) to facilitate a communication router routers in different autonomous systems with. Shot as a network address Protocol, which holds a wide range of file types and is defined in RFC 959 , see TFTP . It can be provided by a secondary router added to a remote network. Link State Routing Protocols DTE Data Terminal Equipment (data terminal equipment) positioned in any user - Network Interface and 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 . RIP supplement : Spanning-tree vlan 1 priority ? Modify the priority of the switch to change the cost cost of the interface The traffic " rounds and goes to the router. The over rate is the maximum rate minus the insurance rate. Depending on the availability of network resources, excess traffic can be dropped during congestion. Contrast maximumraten Debug ip eigrp neighbor debug neighbor creation process Experiment : PPP authentication method : Caused by simultaneous transmission of the network segment. Its appearance may exhaust the network bandwidth and cause a timeout. Media type : twisted pair , coaxial cable , fiber Part of the computer sends data to another part. administrative distance ( management distance ) from 0 to 255 a number between, which represents one routing information address resolution ( ARP ) to resolve the differences between computer addressing scheme of the process. Address resolution R14(config-if)#dialer string 016300 The node automatically performs the diagnosis and attempts to reconfigure the network by bypassing the failed area. FTP file transfer protocol (File Transfer Protocol): used to transfer files between network nodes of TCP / IP =========================================================== =============== Crankback (in case of busy return ) In ATM , when a node cannot accept a connection somewhere on the selected path B: 172.16.0.0/16 -- 172.31.0.0/16 Clear line XXX clear line =========================================================== =========== And the protocol to close the session and the sequential request. See ATP . Network or subnet, which part represents the host. Sometimes referred to as a mask. Playing subnet mask Ppp authentication CHAP chooses to use CHAP for authentication [chap | pap] debug ppp authentication to debug PPP authentication . switchport mode trunk change the interface mode to trunk mode of operation in 3550 to create an 802.1Q trunk road It enables two socket (Socket) can be reliably performed between transactions, wherein a request for another execution of a given task and to report the results. ATP grabs both the request and the response, ensuring that the request - response is exchanged without loss. In attenuation ( attenuation ) communication, the weakening or loss of signal energy, usually caused by distance. Broadcast ( Broadcast ) ----- a data frame or packet is transmitted to the local network segment ( defined by the broadcast domain ) for each node on. Broadcast broadcast address indicated by its destination network and host address bits are all 1 . Also known as " local broadcast " . Compare directedbroadcast . Static NAT configuration The station's HDLC communication mode, where the transmission can start from the primary station or a secondary station. 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. Halfduplex . Spanning tree port Spanning tree port NET / ADAPTIVE company in I991 co-founded the international organization, the organization for the development and promotion of the ATM standards-based technology implementation of the agreement. The ATM Forum relaxed the official standards developed by ANSI and ITU.T and created implementation agreements before the official standards were released. A digital device of the loop. Often referred to as a CSU/DSU along with a data service unit . See DSU . ------------------------------------------------- Action : Deny BIP bit interleaved parity (Bit Interleaved Parity) ATM are used to monitor the link on the error bridge. The bridge ID is a combination of bridge priority and base MAC address. Frame-relay switching Show spanning-tree brief to view the spanning tree status (3500xl) (2950/3550 : show spanning-tree) The route to the network. Encapsulation frame-relay clockrate 64000 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. 1.0.0.0 2.0.0.0 3.0.0.0 4.0.0.0 Ciscoa.njut.edu.cn =========================================================== =============== 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 . Enhanced IGRP ( Enhanced IGRP) ----- Enhanced Interior Gateway Routing Protocol (Enhanced Interior GatewayRouting Protocol): Cisco an advanced routing protocol created, which combines the advantages of link-state and distance between the amount of protocol. Enhanced IGRP has extraordinary convergence properties, including high operational efficiency. See IGP , PPP 's own password configuration frame types ( frame type ) the LAN in a frame is used to determine how to put on the local network. Ethernet DTE Data Terminal Equipment (data terminal equipment) positioned in any user - Network Interface and 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. =========================================================== ===================== 1.0.0.0 2.0.0.0 3.0.0.0 4.0.0.0 A: 10.0.0.0/8 E-1---- A wide-area digital transmission scheme commonly used in Europe to transmit data at a rate of 2.048 Mb/s . =========================================================== ================ address resolution ( ARP ) to resolve the differences between computer addressing scheme of the process. Address resolution Node group. A direct broadcast is indicated by its broadcast address, which is a destination subnet address where all bits are one . ------------------------------------------------- It can be provided by a secondary router added to a remote network. A feature that changes routing. =========================================================== =============== EIGRP uses a wildcard mask configuration example : Ip address 10.1.1.1 255.255.255.0 Encapsulation frame-relay no shut It consists of a router or access server or several routers or access servers, using inter-access tables and other methods to ensure the security of the private network. dixed configuration router ( fixed router ) can not be used to upgrade any new interfaces of the router. Ppp authentication CHAP chooses to use CHAP for authentication [chap | pap] debug ppp authentication to debug PPP authentication . The higher the RouteID, the easier it becomes to become a DR (Designated Router designated router ) Node group. A direct broadcast is indicated by its broadcast address, which is a destination subnet address where all bits are one . =========================================================== =============== 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 . The method of traffic. Low priority traffic is discarded at the edge of the network when the indicator indicates that it cannot be transmitted to use resources efficiently. Static NAT configuration Ethernet ( Ethernet ) A baseband LAN specification created by Xerox , then via Xerox , Digital Packaging method. HDLC is a bit-oriented synchronous data link layer protocol created by ISO , which originated from SDLC . However, most HDLC vendor implementations ( including Cisco 's ) is patented. See SDLC . block size ( block size ) available hosts in a subnet. The block size can generally be in increments of 4 , 8 , 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 . =========================================================== =============== 0x2 Router will load the Flash in the IOS software . (Default config regcode) The fixed length enables cells to be processed and exchanged in hardware at high rates, making this technology the basis for ATM and other high-speed network protocols. See cell . A (config) #inte s 1 enters s 1 interface IGRP configuration Vlan database enters vlan configuration mode vtp domain configures VTP domain name vtp password configures VTP password TCP ( Transmission Control Protocol ), connection-oriented , with retransmission mechanism , reliable transmission NextHopIP: Next hop IP Cisco layered network. The distribution layer is the connection point of the access layer device. Routing is done at this level. Class B network (B -based network ) portion of the Internet Protocol hierarchical addressing scheme. Class B network has 16 1. Content of the announcement : Incremental update (OSPF lsa) 2. Announcement time : Trigger 3. Announced object : Router with neighbor relationship Sended and is not reliable. Compare connection-oriented . See virtual circuit . Serial1 is down, Line protocol is down CPE customer premises equipment is installed at the user's location and connected to the telephone company's network equipment, such as telephones, Port Console ( control port opening ) the Cisco a typical routers and switches on the RJ-45 ports, with Information can be used to determine if the network has recently caused a change in the problem. 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. Programmable after shipment, these non-volatile memory chips can be wiped off and reprogrammed with high power light when needed. See EEPROM and PROM . Router eigrp 100 CPCS CPCS layer (Common Part Convergence Sublayer) two business Segment, even the port field in the transport layer header filters the IP address table of the network Broadcast ( Broadcast ) ----- a data frame or packet is transmitted to the local network segment ( defined by the broadcast domain ) for each node on. Broadcast broadcast address indicated by its destination network and host address bits are all 1 . Also known as " local broadcast " . Compare directedbroadcast . AAL5 ATM Adaptation Layer 5 One of the four AALs recommended by ITU-T , mainly used to support inter-face connection Rate enhancement and VCT conversion. See ATM . Direct forwarding : fast , but can not ensure the correctness of the forwarded frame . Routing methods. The autonomous system is subdivided by region and must be assigned a separate 16 -digit number by TANA . See area . Ethernet ( Ethernet ) A baseband LAN specification created by Xerox , then via Xerox , Digital . 1 T-chanelined ( channel of the channel T-1) operate in 1.544Mb / s one access link is 23 is th B channels Network 192.168.1.0 0.0.0.3 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. 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. 1900 only supports ISL trunk protocol 2950 only supports 802.1Q trunk protocol 3550 supports 802.1Q and Dynamic VLAN ( Dynamic DLAN) A manager that creates entries in a special server. 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 Classical IP over ATM ( classical IP over ATM) is defined in RFC 1577 to make ATM features The IP address is converted to a MAC address. See RARP . Show ip protocols to view information about RIP can Corelayer The top layer of the Cisco three-tier hierarchical model that helps design, build, and maintain a The credibility value of the source. The smaller the value, the higher the level of constitutionality A feature that changes routing. 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 . Interface Serial1.1 multipoint 1. Neighbor table => all neighbors R6(config)#interface ethernet 0 CO central office (central office) , all circuits in a certain area are connected here, is the subscriber line A technique that allows for more data. =========================================================== =============== The demodulator demodulates the analog signal into the original digital form ( in turn, modulates the digital data it transmits into an analog signal ) . See modulation . auto-detectmechanism ( automatic detection mechanism ) for use in Ethernet switches, hubs, and the interface card, Layer and Transport layer . IGRP configuration change. The central switch does not have on-site switching capabilities. Therefore, all customer connections are returned to the CO . See CO . Configure terminal enters global configuration mode =========================================================== =============== all-routes explorer packet ( full routing packet detection ) a can pass over the entire SRB sounding packet network, Rip : Router information protocol helper address ( help address ) specified unicast address, which directs Cisco router into direct BGP speaker (BGP speakers ) advertises its routing prefix or router. Ip route 4.0.0.0 255.0.0.0 2.0.0.2 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 . Hostname ABC configuration local username Designated bridge (the designated bridge ) has the most in the process of forwarding frames from a network segment to a routing bridge. 1. Add this interface to the rip process. 2. Advertise the network of this interface to other routers. It consists of a router or access server or several routers or access servers, using inter-access tables and other methods to ensure the security of the private network. dixed configuration router ( fixed router ) can not be used to upgrade any new interfaces of the router. Show ip ospf interface serial 1 View the process ID of RouterID and OSPF and the associated network type . show ip protocols =========================================================== =============== Register cofiguration ( 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, which is configured with a hexadecimal value along with the configuration command to set the boot options.