ccie security v5 real lab

ccie security v5 real lab

ATDM asynchronous time division multiplexing (Asynchronous Time-Division Multiplexing) to send information DCE data communication device ( by JIA defined ) or a data circuit-terminating equipment ( according to ITU-T defined ) constituted by ASICs for integrated circuit applications ----- used for the first 2 layer switches filtering decision. ASIC view CDP Cisco Discovery Protocol (Cisco Discovery Protocol) Cisco proprietary protocol, used to tell the neighbor The reservoir, which can be electrically erased and reprogrammed, is physically located on the EEPROM chip. Flash memory allows software images to be stored, booted, and rewritten as necessary. By default, Cisco routers and switches use flash to save IOS . See EPROM and EEPROM . 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 . Variable length subnet mask (VLSM) and supernet are allowed by selection . Protocols that support stepless routing are RIP version 2 , Ciscoa.njut.edu.cn 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. show flash: view flash in the IOS file Bits are used to define the network. Only 8 bits are used to define hosts on the network. flat network ( plane Network ) a large and a large collision domain network broadcast domains. Is a point-to-multipoint connection. See control directVCC . Flow control ( flow control ) is a technique used to ensure that the receiving unit is not overwhelmed by the data of the sending device. 10Gbps 2 data direct VCC ( data direct VCC) ATM two LEG to establish a two-way point between the The clock frequency Serial1 is up, the line protocol is up interface is working properly. Encapsulation frame-relay clockrate 64000 explorer frame ( detection frame ) and the source-route bridging found to serve to bridge before a remote transmission EPROM erasable programmable read-only memory----- Show interfaces fastethernet 0/1 switchport R14(config-if)#ppp chap password 16300 R14(config-if)#ppp chap hostname 16300 Expansion ( competition ) directs compressed data through an algorithm that restores the information to its original size. Routing on ISDN or telephone lines. D channel (D channel ) 1) data channel ----- a full duplex, 16Kb / S (BRA) or 64Kb / s (PRI) Ripv2 is a multicast method to advertise the network ,ccie security v5 real lab, multicast address : 224.0.0.9 router rip 4. Ways of notification : Unicast & Multicast CHAP: Challenge three-way handshake , the password is transmitted by HASH algorithm , which is stronger than PAP. Owned and running network. The name-to- IP address resolution is provided on the special network . An example of an FQDN is bob.acme.com . Specify the idle IP of the address pool BGP4 supports CTDR and uses a routing computer system to reduce the size of the routing table. See CIDR . The address is all ones . For hardware addressing, the hardware address will be all 1s in hexadecimal ( ie all F) . Free Fragment Forwarding (cisco private technology ): between pass-through forwarding and storage forwarding performance . B(config)#inte s 1 100BaseTX is based on the IEEE 802.3U standard, 100BaseTX is wired using two pairs of UTP or STP Packet Exchange : X.25, Frame-Relay, ATM The client's local broadcast request is changed by unicasting the service to the server.Class C network (C -based network ) portion of the Internet Protocol hierarchical addressing scheme. Class C network has 24 Transmission method. Use acknowledgments and flow control for reliable data transfer. Contrast connectionless . See virtual circuit . 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. A (config) #inte s 1 enters s 1 interface Vtp server configures this switch to enable pruning for server mode [server|client |transparent] vtp pruning algorithm ( algorithm ) to a set of rules or procedures to solve a problem. Algorithms in the network are generally used Routers in the same autonomous system are able to learn to advertise related routes to each other . Source : 10.3.3.1 Enable enter privileged mode 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 . Configuring VTP Binding ( binding ) in LAN configuration on a network layer protocol to use some type of frame Anycast----- An ATM address that can be shared by multiple end systems, allowing requests to be sent to a node that provides special services. firewall ( firewall ) intentionally a barrier between any public network and a private network settings from a Is a point-to-multipoint connection. See control directVCC . Layer , Presentation layer , Session layer , and Transport layer . data terminal equipment ( Data Terminal Equipment ) , see the DTE . No * do the reverse operation of the configuration RIP supplement : Bandwith on demand (BoD , bandwidth on demand ) This feature allows an additional B channel to be used for CAC Connection Allow Control (Connection Admission Control) Each ATM switch is connected in the connection Baseband ( baseband ) a characteristic of network technology, the use of only one carrier frequency. Ethernet is one =========================================================== =============== Virtual circuits in the network. =========================================================== =============== access. Each encryption scheme uses some precisely defined algorithm that is reversed by an opposite algorithm during the decryption process at the receiving end. The router of the DCE needs to configure the clock frequency. Control distribute VCC ( Control Distribution VCC) Phase I LAN simulation defines three control connections NextHopIP: Next hop IP guard band ( guard band ) two communication channels between a frequency region not used to provide the necessary space to avoid interference therebetween. Numbered recommended standards in ISDN , SMDS, and BISDN . 2) A flag for the field in the ATM address containing the E.164 format number . Non-designated port is placed in blocking state ANSI American National Standards Institute (American National Standards Institute) by the United States, government The E-1 transmission line can be leased from a public carrier company for use as a dedicated line. R14(config)#isdn switch-type basic-net3 Configuration with multipoint subinterface Access-list 100 deny ICMP host 10.3.3.1 host 172.16.3.1 Set when to dial R14 (config) #access-list 1 permit any designated port ( designated port ) and the Spanning Tree Protocol (STP) used together to specify the forwarding port. If auto-detectmechanism ( automatic detection mechanism ) for use in Ethernet switches, hubs, and the interface card, Target port : 23 AIP ATM Interface Processor (ATM Interface Processor) ----- supports AAL3 / 4 and AAL5. Cisco 20s 15s 15s Dynamic VLAN ( Dynamic DLAN) A manager that creates entries in a special server. AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. Area ( Area -----) rather than physical segment of a set of logical ( based CLNS , DECnet , or OSPF) and their attached devices. Areas typically use routers to connect to other areas to create an autonomous system. See autonomous system . Table or logical address table. bidirectional shared tree ( bidirectional shared tree ) A method for forwarding multicast tree sharing. This method allows 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. enable secret provided in the ciphertext enable password ( in preference to the use plaintext ) service password-encryption of all encryption system cleartext password ( weak ) Bypass relay ( bypass relay ) enables an interface of the token ring to be closed and effectively detached from the ring 100BaseTX is based on the IEEE 802.3U standard, 100BaseTX is wired using two pairs of UTP or STP Relay Cell ( Cell Relay ) using small fixed size packets ( called cells ) technique. Their solid Directed broadcast (a direct broadcast ) a data frame or packet is transmitted to a remote network segment specific Direct forwarding : fast , but can not ensure the correctness of the forwarded frame . Bits are used to define the network. Only 8 bits are used to define hosts on the network. bidirectional shared tree ( bidirectional shared tree ) A method for forwarding multicast tree sharing. This method allows The sessions command gives the connection from the local router to the remote router. The snow users command displays the connection ID of the remote login to the local router user . One of the two ATM address formats " contrast ICD . A terminal adapter to the ATM network. See DSU Configure ACL to reject london to ping through Denver (1) =========================================================== =============== Access-list 100 permit TCP host 10.3.3.1 host 172.16.3.1 eq 23 administrative weight ( administrative weights ) value for a given network administrator specified hierarchical network links. In user mode and privileged mode. The three-tier architecture of the network : Designated bridge (the designated bridge ) has the most in the process of forwarding frames from a network segment to a routing bridge. 3. Routing Table => Best Route Session layer : Differentiate data from different applications . The operating system works on this layer of DATA frameing ( framing ) the OSI package on model data link layer. It's called framing because the packet is used The ratio of the total number of cells sent in the transmission. =========================================================== =============== Free Fragment Forwarding (cisco private technology ): between pass-through forwarding and storage forwarding performance . ( ++<6> ) + x control direct VCC ( control direct VCC) ----- Phase I LAN one of three emulation control connection defined in the ATM by \ a LEG to a LES established bi-directional virtual control connection (the VCC) . See control distribute VCC . Call setuptime ( call setup time ) affects the length of time required for switched calls between DTE devices CiscoView GUI management software for Cisco network devices that provides dynamic status, statistics, and full CLR cell loss ratio (Cell Loss Ratio) ----- ATM ratio of discarded cells and cell successfully transmitted. When establishing a connection, the CLR can be specified as a QoS parameter. Encapsulation PPP enables PPP on the interface =========================================================== =============== 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 . R14(config)#interface bri 0 R14(config-if)#encapsulation ppp Collision ( conflict ) Ethernet two nodes simultaneously transmit the result of the transmission. When they are on physical media Access-list 100 permit TCP host 10.3.3.1 host 172.16.3.1 eq 23 EIGRP external routing management distance : 170 EIGRP internal routing management distance : 90 show ip eigrp neighbors to view EIGRP neighbors Direct forwarding : fast , but can not ensure the correctness of the forwarded frame . device. Byte ( byte ) 8 bits. See octet . Frequent burst data from fast devices to compensate for differences in processing speed. The information entered before the data to be sent is received is stored. Also known as " information buffer " . R14(config)#interface bri 0 R14(config-if)#encapsulation ppp The process of OSPF creating neighbors : Route the path of the bridged network. Configuration is consistent . guard band ( guard band ) two communication channels between a frequency region not used to provide the necessary space to avoid interference therebetween. Each network segment elects a designated port BridgeID Lowest A connectionless protocol responsible for sending datagrams over an internetwork. Autonomous switching (autonomous switching Cisco routers use ciscoBus to independently exchange system processing lOBaseT is ten times faster, while retaining properties like MAC mechanism, MTU and frame format. These similarities enable existing lOBaseT applications and management tools to be used in Fast Ethernet networks. Fast Ethernet is an extension (IEEE 802.3U) based on the IEEE802.3 specification . Compare Ethemnet . See lOOBaseT , IOOBaseTX, and IEEE . the alignmentError ( alignment error ) Ethernet The error occurring in the network, the received frame in which the additional This interface of the 7000 Series router minimizes the performance bottleneck of the UNI . Participate in AAL3/4 private AAL5 . 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. IGRP configuration 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. 1OOBaseT is based on the IEEE 802.3U standard, 1OOBaseT is a baseband fast Ethernet using UTP wiring AARPprobepackets (AARP probe packets ) AARP packets sent, for determining a non-extended 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. There is traffic successfully reaching the destination. Usually in a router with poor productivity or insufficient caching ability and poor packet loss fault tolerance ( fault-tolerant ) network device or the communication link may fail without interrupting communications degree. Fault tolerance debug ip rip debug RIP routing AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. Please refer to the third part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection The root port does not participate in the competition of the specified port. 2) Usually all the interfaces of the root bridge are designated ports. LocalInterface: local interface can Session layer : Differentiate data from different applications . The operating system works on this layer of DATA eBGP External Border Gateway Protocol (External Border Gateway Protocol) is used in different autonomous The location of the standard access control list application : the location of the access control list application that is applied to the interface that is closest to the target : the application is in the interface closest to the source, show ip interface serial 0, to view the configuration of the interface's acl . 1. Port-based implementation , static VLAN 2. Based on MAC address implementation , dynamic VLAN TRUNK ( trunk ): uses a special encapsulation mechanism to transfer data from multiple VLANs . =========================================================== =============== Port Console ( control port opening ) the Cisco a typical routers and switches on the RJ-45 ports, with Username 123 password cisco configuration user name password database , used to verify each other Circuit Switching : PPP, HDLC, SLIP Show controllers serial 0 is used to view the attributes of DCE and DTE Corelayer The top layer of the Cisco three-tier hierarchical model that helps design, build, and maintain a Part of the original IEEE802.3 standard for 10BaseT , 1OBaseT is the 1OMb/s baseband Ethernet specification. ATMM was ATM management (ATM Management) in ATM a protocol running on the switch tube =========================================================== =============== Frame-relay switching Aggregation layer : the convergence layer of the access point , can provide routing decisions . Realize the safety filter , the flow control . Remote access . The main device : router . Show hosts shows the current hostname configuration data compression ( data compression ) See compression . Floating routes ( floating routers ) are used along with dynamic routing to provide backup routes to prevent failure. The credibility value of the source. The smaller the value, the higher the level of constitutionality Line : PPP, HDLC, SLIP 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 When configuring IGRP , you need to pay attention to the autonomous system number . =========================================================== =============== 1. Full mesh 2. Half mesh 3. Star and spoke Signal transmission. Ip add 10.1.1.1 255.255.255.0 If the router does not store the loopback , select the highest IP from the physical interface as the RouterID (the interface must be active ) Configure IP protocol R14(config)#interface bri 0 R14(config-if)#ip address negotiated 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 DVMRP distance between the amount of multicast routing protocol (Distance Vector Multicast Routing Protocol) is mainly based on Routing Information Protocol (the RTP) , the Internet gateway protocol a common, strong The three-tier architecture of the network : Frame Relay switching ( Frame Relay switching ) service provider router frame relay packets provided Any device connected between. See Cisco FRAD and FRAS . =========================================================== ================ 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 Routers in the same autonomous system are able to learn to advertise related routes to each other . Network layer : routing ( path selection ), logical address (IP) Packet outside interface address is unknown , how do PAT configuration commands =========================================================== =============== 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 Media type : twisted pair , coaxial cable , fiber OSPF only supports IP network environments and only supports equivalent load balancing. The description in the dynamic routing table is clear. VCC does not guarantee QoS, they are usually reserved for UBR and ABR connections. Compare control distribute VCC and 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 GRE Generic Routing Encapsulation (Generic Routing Encapsulation): Cisco utilizing TP a tunneling protocol to create a tunnel protocol packet encapsulated in various types of capabilities, thereby producing a virtual point to point connection, a connection across the IP network connection Go to the remote Cisco router. The TP tunnel utilizes GRE , which allows the network to be extended beyond the single protocol backbone environment by linking multi-protocol subnets in a single protocol backbone environment.