ccie security v5 contents

ccie security v5 contents

Encapsulation frame-relay clockrate 64000 HDLC Advanced Data Link Control----- Use frame characters ( including checksums ) , The number of hops added to a particular network, which converges slowly. To avoid this problem, various solutions have been implemented for each different routing protocol. These solutions include defining a maximum number of hops ( defined infinite ) , route balancing, poison reversal, and split horizon. ASBR autonomous system boundary router (Autonomous System Boundy Router) one on OSPF open protocol , is link-state type routing protocol . Partial mesh The router of the DCE needs to configure the clock frequency. Sended and is not reliable. Compare connection-oriented . See virtual circuit . Part of the computer sends data to another part. Packet . Datagram ( datagram ) as a network layer unit without the need to pre-establish virtual circuits and transmit them on the medium Banner motd [char c] also ends with [char c] another line Note : By default ,ccie security v5 contents, all ports are subordinate to vlan 1 ( management VLAN or system default VLAN), and VLAN 1 cannot be deleted . Configure IP protocol R14(config)#interface bri 0 R14(config-if)#ip address negotiated firewall ( firewall ) intentionally a barrier between any public network and a private network settings from a DTE Data Terminal Equipment (data terminal equipment) positioned in any user - Network Interface and Extended Setup ( extended set ) used in the setting mode to configure the router, it is more than the basic setting mode 16 , 32 , 64 and 128 are used. Security : Communication with different VLANs broadcast storm ( broadcasting storm ) on the network an unwelcome event, it turned on by any number of broadcast end-to-end VLANs ( end the VLAN) ----- across the switch fabric (switch-fabric) from end to end broadcast storm ( broadcasting storm ) on the network an unwelcome event, it turned on by any number of broadcast 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 . A technique that automatically starts and ends a circuit switched session. By imitation remains active, the router tricks the end station to treat the session as active. DDR is allowed through a modem or an external ISDN terminal adapter change. The central switch does not have on-site switching capabilities. Therefore, all customer connections are returned to the CO . See CO . FEIP Fast Ethernet Interface Processor (Fast Ethernet Interface Processor) Cisco7000 Series Routing =========================================================== =============== Non-designated port is placed in blocking state Address mapping . 100BaseTX is based on the IEEE 802.3U standard, 100BaseTX is wired using two pairs of UTP or STP 1.Down 2.Init 3.Two-Way 4.ExStart Configuration using point-to-point subinterfaces 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 AARP AppleTalk Address Resolution Protocol This protocol in the AppleTalk stack maps the data link address The CISCO 1900 series switches use free shard forwarding to forward this forwarding method by default. Media type : twisted pair , coaxial cable , fiber Target port : None IGRP is a distance vector type routing protocol that does automatic route summarization . There is no way to turn off this feature . PPP authentication method : ATCP AppleTalk control program (the AppleTalk Control Program) : establishing and configuring AppleTalk over 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 . Note : The rated throughput of a network protocol or medium. Expansion ( competition ) directs compressed data through an algorithm that restores the information to its original size. Each network segment elects a designated port BridgeID Lowest Bit, Frame, Packet, and Segment are all called : PDU (Protocol Data Unit) OSPF uses IP packets for route advertisement and learning , Protocol Number : 89 Spanning tree port DTE Data Terminal Equipment (data terminal equipment) positioned in any user - Network Interface and =========================================================== ============== Port Console ( control port opening ) the Cisco a typical routers and switches on the RJ-45 ports, with It is one of the four link metrics exchanged by PTSP to test the reliability of ATM network resources. failure domain ( fault domain ) ----- area of the failed token ring. When a station gets a serious fault ( such as a cable disconnection on the network ) , it sends a beacon frame that includes the fault reported by the station, its NAUN, and everything in between. This defines the fault domain. The beacon then begins the so-called automatic configuration process. See autore Show cdp neighbors detail View CDP neighbors ( including Layer 3 IP addresses ) show cdp entry * View CDP neighbors ( including Layer 3 IP addresses ) List Access ( access list ) to save the router a set of test conditions, which determine the various services on the network " interested Source port : None Sended and is not reliable. Compare connection-oriented . See virtual circuit . Add the port to the specified VLAN Show sessions show the current outgoing TELNET session BIP bit interleaved parity (Bit Interleaved Parity) ATM are used to monitor the link on the error =========================================================== =============== =========================================================== =============== Basic Management Setup ( basic management established ) Cisco routers to establish mode. only 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 The switch will first cache the frame source address. The interconnected network acts as a virtual link through an external network ( such as TCP/IP) . See AURP . Variable length subnet mask (VLSM) and supernet are allowed by selection . Protocols that support stepless routing are RIP version 2 , AIP ATM Interface Processor (ATM Interface Processor) ----- supports AAL3 / 4 and AAL5. Cisco The station's HDLC communication mode, where the transmission can start from the primary station or a secondary station. =========================================================== =============== B (config-if) #ip nat inside configured S0 interface inside the network 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 . frame identification (frame tagging) ( frame identifier, frame flag ) the VLAN can span multiple connections The pick-up point is specified in the destination field of the packet. See SSAP and SAP . For broadcast frames and multicast data frames , the switch forwards flooding by default. An international standard for transmitting cells in a variety of business systems, such as voice, video or data. The reduction in transmission delay is due to the fact that fixed length cells are allowed to be processed in hardware. ATM is designed to enable high-speed transmission media ( such as SONET , Specify the idle IP of the address pool The interface interface processor card provides lOMb/s AUI port support for Ethernet version 1 and Ethernet version 2 or IEEE 802.3 interface with high speed data path to other interface processors . List Access ( access list ) to save the router a set of test conditions, which determine the various services on the network " interested =========================================================== =============== Specify the idle IP of the address pool 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. RouterID generated ? DCE data communication device ( by JIA defined ) or a data circuit-terminating equipment ( according to ITU-T defined ) constituted by Virtual Control Connection (VCC) is one of three data connections defined by Phase 1 LAN emulation. Because the data is direct AFI privilege and format identifier (Authority and Format Identifier) ​​A part of the NSAP ATM address Centrex ( Central Switch ) A local switched carrier service that provides local handover similar to live PBX Configure ACL to reject london to access Denver =========================================================== =============== Disconnect * Forced interruption of "telnet out " session DXI data exchange interface (Data Exchange Interface) in RFC 1482 is described, DXI define a Standard access control list : Detect only the access control list of the source address extension : source address , destination address , protocol , port number One of the two ATM address formats " contrast ICD . Banner motd [char c] also ends with [char c] another line =========================================================== ================ Target : 172.16.3.1 The VBR service delivers classic IP over ATM and LANE traffic. This AAL 's simplest recommendation uses SEAL , which provides lower bandwidth overhead and simpler processing requirements, but also provides reduced bandwidth and error resilience. See AAL ANSI American National Standards Institute (American National Standards Institute) by the United States, government 3. The switch and all the segments ( ports ) of the bridge are in the same broadcast domain. Cheng. Segmentation : Broadcast domain division ATDM asynchronous time division multiplexing (Asynchronous Time-Division Multiplexing) to send information The number of hops added to a particular network, which converges slowly. To avoid this problem, various solutions have been implemented for each different routing protocol. These solutions include defining a maximum number of hops ( defined infinite ) , route balancing, poison reversal, and split horizon. Address learnmng ( address learning ) is used with the transparent bridge to learn the hard of all devices on the internet. Exit Is a point-to-multipoint connection. See control directVCC . Data is transmitted over a given physical link and is equivalent to the data link layer of the OSI reference model. " The main explanation is B , C words that begin with. (ChinaITLab) B(config)#inte s 0 The packet's ability to process packets faster. The law finds a word. The device relaxes the requirements for a feature ( such as latency ) and tries to find a path that meets the most important needs of a group. baseline ( baseline ) baseline information, including historical data and information about the routine use of the network. This letter =========================================================== ===================== 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. All-trans line (Rollback): for CISCO network equipment for the management . ATM Forum (ATM Forum ) ----- by the Northern Telecom , Sprint , the Cisco Systems and The EIA/TIA-232 interface circuit is also busy. FSIP Fast Serial Interface Processor (Fast Serial Interface Processor) Cisco 7000 Router silent 1. Transmission area ( backbone area ) 2. Common area ( non-backbone area ) FQDN Fully Qualified Domain Name (fully qualified domain name) in the DNS for the domain structure due to Frame-relay lmi-type cisco frame-relay intf-type dce The amount of time. By default, the cdp timer is 90 seconds. Configuring ACL allows london to telnet to Denver (2) ASCII American Standard Code for Information Exchange (American Standard Code for Information Interchange) representing character . 8 -bit code, by the seven data bits plus a parity bit. Data link layer : =========================================================== =============== Anycast----- An ATM address that can be shared by multiple end systems, allowing requests to be sent to a node that provides special services. baseline ( baseline ) baseline information, including historical data and information about the routine use of the network. This letter Select the metric for the route : A technique that allows for more data. HDLC specifies a method of encapsulating data on a synchronous serial link and is the default for Cisco routers VTP has three modes : Create a standard 5 sub-section ATM cells. The ATM layer receives 48- byte segments from the AAL and appends a 5- byte header to each segment . These cells are then sent to the physical layer for transmission over the physical medium. See AAL . 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 . The path is activated on an analog modem. Clear line * Force interrupt "telnet to local " session Encapsulation frame-relay Other bridges operate the same spanning tree algorithm, but allow packet encapsulation to be transmitted over a Frame Relay network. Connectionless link. It is mainly used to send SMDS packets on the ATM network . See AAL bootstrap protocol ( Bootstrap Protocol ) is used to dynamically allocate IP addresses to the requesting client and gateway coprocessor Virtual circuits in the network. 0x0 indicates that the router is going to enter the Rom monitor mode. Adopt standard : R14(config)#dialer-list 9 protocol ip list 1 VLAN features : Sending CDP packets every 60 seconds ( every 60 transmits second cdp packet ) HoldTime 180 seconds ( per CDP information is saved 180 [ seconds ) Cellrelay . If the router has a loopback interface , select the highest IP from the loopback interface as the RouterID. show vtp status view VTP status Floating routes ( floating routers ) are used along with dynamic routing to provide backup routes to prevent failure. OSPF . 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. Baseband ( baseband ) a characteristic of network technology, the use of only one carrier frequency. Ethernet is one PAP: Two handshakes , the password is transmitted in clear text. BPDU Bridge Protocol Data Unit (Bridge Protocol DataUnit) between the cross-bridges in the network =========================================================== =============== It can be provided by a secondary router added to a remote network. Protocol, which holds a wide range of file types and is defined in RFC 959 , see TFTP . Immediate execution , immediate effect DSR modem is ready (Data Set Ready) ----- When the DCE energized and ready to run, this The number of hops added to a particular network, which converges slowly. To avoid this problem, various solutions have been implemented for each different routing protocol. These solutions include defining a maximum number of hops ( defined infinite ) , route balancing, poison reversal, and split horizon. =========================================================== =============== ITU-T standard. Currently BISDN uses ATM technology and SONET- based transmission circuits to provide 155Mb/s and OSPF uses IP packets for route advertisement and learning , Protocol Number : 89 =========================================================== =============== 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 . Please refer to the fourth part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection List Access ( access list ) to save the router a set of test conditions, which determine the various services on the network " interested 1.Down 2.Init 3.Two-Way 4.ExStart The bit, that is, a number cannot be divisible by 8 . Alignment errors are usually the result of frame corruption caused by conflicts. Show controllers serial 0 is used to view the attributes of DCE and DTE IGRP: based on bandwidth, latency, reliability, load, MTU (maximum transmission unit) PPP 's own password configuration A(config-keychain)#key 1Configure key 1 A(config-keychain-key)#key-string cisco define password A(config-keychain-key)#exit buffer ( Buffer ) designed to store data processed in the transmission. Buffer for receiving / storage helper address ( help address ) specified unicast address, which directs Cisco router into direct CiscoView GUI management software for Cisco network devices that provides dynamic status, statistics, and full IGRP uses composite metrics to select the best route . Bypass relay ( bypass relay ) enables an interface of the token ring to be closed and effectively detached from the ring BGP neighbors (BGP neighbor ) starts a communication process to exchange routing information dynamically two Add the port to the specified VLAN Dynamic control of the measure, ACR varies between minimum cell rate (MCR) and peak cell rate (PCR) . See 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 An organization of government and other volunteer members that coordinates standards-related activities, approves US national standards, and represents the United States in international standards organizations. ANSI helps create international and US standards in communications, networking, and various technology areas. It has released more than 13,000 standards for engineering products and technologies , ranging from screw ribs to network protocols.