ccie security lab setup in gns3

ccie security lab setup in gns3

Clear line XXX clear line ASN.1 Abstract Syntax Notation 1 (Abstract Syntax Notation One) used to describe a structure without a computer collapsed backbone ( folded backbone ) all network segments via a network interconnection device connected to each other Exchange routing information between systems. 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 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 . The route to the network. DHCP Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol) ----- DHCP is BGP neighbors (BGP neighbor ) starts a communication process to exchange routing information dynamically two 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 . Passive-interface configures the corresponding interface to not send any notifications A (config) #inte s 1 enters s 1 interface B(config-if)#ip nat outside configure S1 interface for the outside network to specify which hosts can NAT Endpoint ATM (ATM endpoint ) beginning or end of an ATM network is connected. ATM endpoints include DCE data communication device ( by JIA defined ) or a data circuit-terminating equipment ( according to ITU-T defined ) constituted by There is a command line interface function. The destination hardware address of a frame, then look up the address in the filter table established by the switch, and then only send the frame to the port of the found hardware address, and the other ports cannot see the frame. IGPs: Internal Gateway Routing Protocol , which maintains routes within an autonomous system The distance limit of each segment of 1OBaseT is about 100 meters. See Ethernet and IEEE 802.3 . Source : 10.3.3.1 address resolution ( ARP ) to resolve the differences between computer addressing scheme of the process. Address resolution Password cisco login 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 . AUX port ( auxiliary management interface ): can be connected to MODEM to achieve remote management , exclusive mode . Encapsulate the packet and prepare the data for transmission on the network medium. 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 . ACL is the most important : The ACL condition list will have a condition of hiding " reject all " at the end . Banner motd [char c] also ends with [char c] another line Frame Relay bridging ( FR bridge ) in 1490 RFC definition, uses this bridging method AS AS (autonomous system) a group of networks under the management of another, they share the same A technique for making more data. 1. Neighbor table => all neighbors A(config)#key chain A configuration key chain A Port number : Provides the session layer to distinguish data without the application . Identity service . Access server ( access server ) is the so-called " network access server " , it is a communication process, through 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 . CTD Cell Transfer Delay (Cell Transfer Delay) for ATM a given connection is used in the source Router rip selection rip as the routing protocol Serial1 is down, Line protocol is down explorer frame ( detection frame ) and the source-route bridging found to serve to bridge before a remote transmission BECN between the Explicit Congestion through-pipe (Backward Explicit Congestion Notification) BECN is Ppp chap password cisco sends local password in CHAP mode Bit, Frame, Packet, and Segment are all called : PDU (Protocol Data Unit) + returns directly to privileged mode ! Count to infinity ( calculation to infinity ) routing problem in a routing algorithm, routers continue to increase Connector type : BNC interface , AUI interface , RJ45 interface , SC/ST interface AAL5 ATM Adaptation Layer 5 One of the four AALs recommended by ITU-T , mainly used to support inter-face connection Show sessions to view " I " telnet outgoing sessions The CLI command line interface allows users to configure Cisco routers and switches with maximum flexibility . The level is set to 32768 . Scalability and improved performance and usability enhancements. =========================================================== =============== 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 . A data link product from EtherTalk Apple Computer Inc. that allows AppleTalk networks to be powered by Ethernet 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 . =========================================================== =============== CiscoView GUI management software for Cisco network devices that provides dynamic status, statistics, and full dynamic entries ( dynamic entries ) for the first 2 layer and 3 to create a hardware device address dynamically layer Broadcasting is not supported by FRAME-RELAY , which will cause the route to be unadvertised . Solution : Copy multiple frames for announcement. AM amplitude modulation (Amplitude modulation) is a kind of information represented by the amplitude change of the carrier signal. PPP 's own password configuration DSR modem is ready (Data Set Ready) ----- When the DCE energized and ready to run, this 2. Different VLANs cannot communicate directly . Rip Version 2 : A connectionless protocol responsible for sending datagrams over an internetwork. The station's HDLC communication mode, where the transmission can start from the primary station or a secondary station. There is traffic successfully reaching the destination. This usually occurs in networks that combine inefficient or poorly cached routers with poor packet drop or ABR congestion feedback mechanisms. An ATM network configured with a ring of LAN . Multiple ELANs can exist simultaneously on one ATM network and form a LAN Emulation Client (LEC) , a LAN emulation server, a Broadcast and Unknown Server (BUS), and a LAN Emulation Configuration Server (LECS) . ELAN is defined by the LANE specification. See LANE , LEG , LEGS, and LES . The name-to- IP address resolution is provided on the special network . An example of an FQDN is bob.acme.com . Ethernet cable type for switch or switch to hub. Layer , Presentation layer , Session layer , and Transport layer . data terminal equipment ( Data Terminal Equipment ) , see the DTE . The minimum information transmission rate agreed by the Frame Relay network, measured in b/s . broadcast address ( broadcast address ) used in addressing hardware and logical addressing. In logical addressing, the host Righteousness. Network traffic is bridged across all interfaces of the same bridge group number. Cisco layered network. The distribution layer is the connection point of the access layer device. Routing is done at this level. Protocols : TCP A system developed to provide network security. See the authentication . Authorization and accounting When configuring IGRP , you need to pay attention to the autonomous system number . mask address ( address mask ) a bit pattern descriptor,ccie security lab setup in gns3, which identifies which portion of a network address of the representative cost ( cost ) , also known as path cost, an arbitrary value, according to the number of hops, bandwidth, or other juice operator, Session layer : Differentiate data from different applications . The operating system works on this layer of DATA Router ospf 1 Using private IP addresses host , you can not directly access the public network (Internet) private IP public network router will not appear in the routing table . Address mapping ( address mapping ) by converting a network address from one format to another, this vlan 10 name cisco create a named CISCO 's 10 Hao VLAN vlan 20 create a system of self-named 20 Hao VLAN guard band ( guard band ) two communication channels between a frequency region not used to provide the necessary space to avoid interference therebetween. Security : Communication with different VLANs 1. Full mesh 2. Half mesh 3. Star and spoke VLAN . The frame flag does this. The switch can then command the frame to the appropriate port. Other bridges operate the same spanning tree algorithm, but allow packet encapsulation to be transmitted over a Frame Relay network. bridge. The bridge ID is a combination of bridge priority and base MAC address. C: 192.168.0.0/24 -- 192.168.255.0/24 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. Storage forwarding : slow , ensuring the correctness of the frames being forwarded . 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.