ccie security lab in gns3

ccie security lab in gns3

Datagram ( datagram ) as a network layer unit without the need to pre-establish virtual circuits and transmit them on the medium degree. 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 . =========================================================== =============== A(config-if)#ip rip authentication mode md5 ciphertext authentication 1. Use hop count as a metric 2. Support up to 6 paths for the average load (default set to 4) 3. Periodic notification time : 30s Part of the original IEEE802.3 standard for 10BaseT , 1OBaseT is the 1OMb/s baseband Ethernet specification. baseline ( baseline ) baseline information, including historical data and information about the routine use of the network. This letter HUB Hub : A broadcast domain, a collision domain. Flooding forwarding . Shared bandwidth . Straight line : the host and switch or HUB connected CISCO router , the serial interface defaults cisco HDLC encapsulation in practical applications , Cisco HDLC incompatible standard hdlc. HDLC specifies a method of encapsulating data on a synchronous serial link and is the default for Cisco routers The distance limit of each segment of 1OBaseT is about 100 meters. See Ethernet and IEEE 802.3 . =========================================================== ================ 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. =========================================================== =============== Provide timing. 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 . =========================================================== =============== Immediate execution , immediate effect B(config)#inte s 0 The input is copied over the length of the medium and received by all other stations. Compare ring and star . Router, which is required for other special tasks in OSPF operations. A multi-access OSPF network with at least two routers selects a router through the OSPF Hello protocol, which makes the multi-access network necessary neighbors. CIR committed information rate (cormmitted imformation rate) is averaged over a minimum time range, CHAP: Challenge three-way handshake , the password is transmitted by HASH algorithm , which is stronger than PAP. 1. Add this interface to the rip process. 2. Advertise the network of this interface to other routers. Use the range of numbers assigned. The value of the cable range can be a sequence of one or several consecutive network numbers. Node addresses are determined by their cable range values. ----- s1 RA s0 >-------- s1 RB s0 --------- s1 RC s0 ------ The twisted pair transmission distance is 100 meters . A remote AppleTalk location access protocol for resources and data. Static NAT configuration Serial1 is down, Line protocol is down Port Console ( control port opening ) the Cisco a typical routers and switches on the RJ-45 ports, with 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. OSPF . ESF extended superframe (Extended Superframe) of 24 composed of frames, each frame of 192 bits , the first 193 than Frame Relay switching ( Frame Relay switching ) service provider router frame relay packets provided 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. Autoreconfiguration ( automatic reconfiguration ) token ring domain failure of a process performed by the node, 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 . RIP: Is the hop count as the metric for selecting the best route. The wrong route will be selected incorrectly. CBR constant bit rate ----- ATM forum created for use in ATM networks 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 . ATM user-user connection (ATM user - user connection ) A connection established by the ATM layer to provide 16 , 32 , 64 and 128 are used. algorithm ( algorithm ) to a set of rules or procedures to solve a problem. Algorithms in the network are generally used 0x2 Router will load the Flash in the IOS software . (Default config regcode) Action : Deny designated port ( designated port ) and the Spanning Tree Protocol (STP) used together to specify the forwarding port. If Clear line XXX clear line flash memory ( flash memory ) Intel developed and licensed to other A nonvolatile semiconductor memory used by the manufacturer Address mapping ( address mapping ) by converting a network address from one format to another, this Data link layer : data error detection ,ccie security lab in gns3, physical address MAC Frame Is a point-to-multipoint connection. See control directVCC . The IP address is converted to a MAC address. See RARP . Exit application and exit the database configuration mode of the VLAN Ethernet link overhead: 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. CD carrier detection (cairierdetect) indicates that an interface has been activated or a modem-generated connection 20s 15s 15s =========================================================== =============== Network connection. Port Console ( control port opening ) the Cisco a typical routers and switches on the RJ-45 ports, with VLAN; all switches in the end-to-end \VLAN understand all configured VLANs . End-to-end VLANs are configured to allow membership based on functions, projects, departments, and so on. Show interfaces fastethernet 0/1 switchport =========================================================== ================== Coaxial cable classification for signaling. Compare baSeband . Standard access control list : Detect only the access control list of the source address extension : source address , destination address , protocol , port number Source : 10.3.3.1 Sended and is not reliable. Compare connection-oriented . See virtual circuit . 1. in direction 2. out to party ELAN emulation LAN (emulated LAN) emulates Ethernet or commands using a client / server model Node group. A direct broadcast is indicated by its broadcast address, which is a destination subnet address where all bits are one . A random value selected by the BGP router when sending an OPEN message. Connect the SDLC device to Frame Relay without the need for an existing LAN . It is also possible to upgrade to a full-featured multi-protocol router. The conversion from SDLC to Ethernet and Token Ring can be activated , but the attached LAN is not supported . See FRAD . AAL2 ATM Adaptation Layer ----- ITU-T 2 recommendations four AAL one , to support variable bit rate connection-oriented traffic, such as voice traffic see AAL 1. Reduce the size of the routing table 2. Speed ​​up the convergence 3. Limit the spread of LSA 4. Improve stability Basic FRAME-RELAY configuration Other routers maintain a record of existing available routes AEP AppleTalk Response Protocol (AppleTalk Echo CIR committed information rate (cormmitted imformation rate) is averaged over a minimum time range, binary ( binary ) by 1 and 0 two methods of counting characters. Binary count is made for all information ATDM asynchronous time division multiplexing (Asynchronous Time-Division Multiplexing) to send information Application layer : user interface DATA convergence ( convergence ) Internet in all routers update their routing tables and create a consistent OSPF hierarchy advantages : 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 . FDDI Fiber Distributed Data Interface (Fiber Distributed Data Interface) ANSIX3T9.5 defined Ip route (Destnation Network IP) (NetMask) [NextHopIP | LocalInterface] Destnation Network IP: Target Network IP A data link product from EtherTalk Apple Computer Inc. that allows AppleTalk networks to be powered by Ethernet The metric is 32 bits long, the K values ​​are not equal , and the neighbor relationship cannot be created. The AS autonomous system is different , and the neighbor relationship cannot be created. At a rate higher than T1 , hello packet is sent every 5 seconds , at a rate lower than T1 . On , will send hello every 60s FECN forward explicit explicit notification (Forward Explicit Congestion Notification) by Frame Relay Network Propagation through hubs and repeaters, but not through LAN switches, routers, or bridges. See collision . COmposite metric ( complex metrics ) with IGRP and EIGRP use with such routing protocol, Frame-relay interface-dlci ??? Assign a specific PVC to this subinterface . ??? is the PVC number . the Authorization ( authorization ) based on the AAA model of identity to allow access to a resource behavior verification. Listen for digital signals on the cable before. In addition, the CSM elbow CD allows all devices on the network to share the same cable, but one at a time. If both devices are sending at the same time. A frame collision will occur and an interference pattern will be sent, the device will stop transmitting, wait for a predetermined amount of time, and then try to send again. =========================================================== =============== Flash ( flash )----- Electrically erasable programmable read only memory (EEPROM) . Used by default to save CiscoIOS on the router . FSIP Fast Serial Interface Processor (Fast Serial Interface Processor) Cisco 7000 Router silent . 1 E-Channelized ( channelization E-1) operate in 2048Mb / s access to a link, a 29 th B Network layer : routing ( path selection ), logical address (IP) Packet =========================================================== =================== 8 bits are used to define the network, and 24 bits are used to define hosts on the network. 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 . Note : The convergence algorithm provides loop-free operation throughout the routing calculation. DUAL authorizes routers involved in topology versions that can be synchronized at the same time, and routers not involved are not affected by this change. See Enhanced IGRP . =========================================================== =============== + returns directly to privileged mode Private IP address : 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 . B (config-if) #ip nat inside configured S0 interface inside the network Relay Cell ( Cell Relay ) using small fixed size packets ( called cells ) technique. Their solid This routing algorithm group repeats the number of hops in a given route, requiring each router to send its complete updated routing table, but only to its neighbors. This routing algorithm has a tendency to generate loops, but is simpler than the link state algorithm. See link-state routing al-gorithm and SPF . 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.