pdu ccna

CCNA Experiment 14 STP redundant backup link (EtherChannel)Environment: Windows XP , GNS3.0.7 , VPCS.exePurpose: Learn how to configure redundant backup links.Steps:1 , open GNS Create the following project:650) this.width=650; "src=" Http://hi.csdn.net/attachment/201011/21/0_1290326291ColF.gif "/>Description:(1) First to add switching modules for SW1 and SW2 two virtual devices(2) Note the console port number for both devices: sw1:2002, sw2:2003(3)

CCNA Experiment 16 fast Spanning Tree Protocol (RSTP)Environment: Windows XP, Packet Tracer5.3Purpose: To understand and configure RSTPDescription: RSTP: Fast Spanning Tree Protocol (Rapid spaning Trees Protocol): This kind of protocol can converge the network faster when the network structure is changed . There are only three port status forbidden ports in RSTP, blocking ports, and listening ports are much shorter than STP convergence time. Steps:

CCNA Experiment 19 static and default routesEnvironment: Windows XP , Packet Tracert 5.3Purpose: To understand the use of static routes and default routesDescriptionstatic routing refers to routing information that is manually configured by the network administrator. When the topology of the network or the state of the link changes, it is necessary to manually modify the relevant static routing information in the router. Static routing information is

Tags: cisco CCNA eigrpEIGRPin order to enhance the internal Gateway routing protocol, it can also be called the enhanced Internal Gateway routing protocol. EIGRPcombining the link state and the distance vector type routing protocolCiscoproprietary protocol using a dispersion correction algorithm (DUAL) for fast convergence, you can reduce the bandwidth footprint by not sending periodic routing update information, whileEIGRPThere are three tables: the

Tags: cisco CCNA VLANVLANthe Chinese name is"Virtual local Area network". is a set of logical devices and users, these devices and users are not subject to physical location constraints, can be based on functions, departments and applications and other factors to organize them, communication with each other as if they are in the same network segment, hence the name of the virtual local area network. VLANwork inOSIthe Reference Model2Layer and Section3

Tags: Cisco CCNA device Basic Configuration1. Define a host name for the routerrouter>enable \ \ Enter Privileged modeRouter#configure terminal \ \ Enter global configuration modeRouter (config) #hostname R1 \ \ Change the router nameR1 (config) #The default router name is "Router", which can be used to differentiate the device from the network for easy management.2. Turn off Domain name resolutionR1 (config) #no IP domain-lookupBy default, when an ad

Tags: cisco CCNA RIPRIP (Routing information Protocol) routing protocol is a kind of routing protocol which has been widely used in small and medium networks. RIP uses UDP packets to exchange routing information with a UDP port number of 520. Normally the RIPV1 message is broadcast, while the RIPV2 message is a group broadcast message, and the multicast address is 224.0.0.9. RIP sends an update message out every 30 seconds. If the device does not rece

CCNA Common commands Chinese comments Access-enable allows the router to create a temporary Access list entry Access-group in the dynamic Access list (ACL) access-list on the application interface defines a standard ip acl www.2cto.com Access-template. Manually replace the temporary Access list entry Appn on the connected router and send the command to the APPN subsystem. The ATM sig executes the ATM signaling command B. manual guide operating system

), and the transport layer related protocols are TCP, UDP and so on. We will often see these two protocol names appear in the "Netstat-ano" command of Windows CMD, under Linux you can enter "NETSTAT-NAUTP" in the terminal to view these ports.E. Session layerThe primary services provided by the session layer are session control, synchronization, retransmission, and so on.F. Presentation layers (Presentation layer)The main services provided by the presentation layer are encoding, compressing, encr

Cisco CCNA Chapter 3 answers Recently I have prepared cisco's semester exam and sorted out the exam answers. 1 2 What are the two forms of application layer software? (Select two items) Applications Dialog Request Service Syntax 3 The Network Administrator is designing a network for a new branch with 25 users. What are the advantages of

CCNA Study Notes 12-NATInside local-> inside group private IP address translation to public IP address, using the internet ◆ NAT term inside outside refers to the physical location (local PC Access to Baidu server, PC is inside Baidu server is outside) inside local: private IP address, cannot be directly used inside Internet inside group Global: Used to replace internal local IP address, on the Internet, it is a legal IP outside group external global:

CCNA Study Notes 13-WAN pppWAN is a type of data communication network over the LAN geographic range. Enterprises must purchase services from WAN service providers. However, a LAN is generally classified as a company goods organization that uses a LAN to connect devices across the WAN to a wider range of geographical areas than a LAN. When you select a cross-region wan network, we recommend that you select the same carrier in the two locations to ensu

CCNA Study Notes 3 --- back up and upgrade IOS1. Backup configuration to TFTP2, COPY from TFTP to run3, back up IOS4, and upgrade IOS5. If the upgrade fails, solution ◆ 1. Backup and Restore configuration 1, ensure that the network IP address of the router and computer (tftp Server) can be reached (direct connection, same network segment) 2. The computer runs tftp software 3, when hostname test1 is set on the vro for verification, we can see the diffe

CCNA Study Notes 6-routing principle, Static RoutingThe router works on the third layer. The device that provides the IP packet forwarding function generally refers to the routing information. The routing information is a piece of information to the destination, indicating the direction to the destination, A route can also represent a path. It refers to the process in which a router searches for its route information for forwarding after receiving an

BPDU guard and root guard functionality rapid-pvst+ (Rapid Per-vlan STP, fast one spanning tree protocol per VLAN)Criteria based on the fast spanning treeFaster than the 802.1D convergence rateSupports Backhomefast, Uplinkfast, and Portfast features IEEE Standards RSTP (Rapid STP, fast spanning Tree protocol)1982 was presented, faster than the 802.1D convergence rateImplementation of Cisco common private properties extensionIEEE RSTP synthesis into 802.1D, calle

255.255.255.255 12.1.1.1IP Route 3.1.1.1 255.255.255.255 23.1.1.3IP Route 4.1.1.1 255.255.255.255 24.1.1.4Configure default only 6R1 R3 R4 Write an IP route 0.0.0.0 0.0.0.0 point to R2R2 Write 3 to 1.1.1.1 3.1.1.1 4.1.1.1Floating static routesFloating static routes are not permanently saved in the routing table, and they load the backup route only if a preferred route match failsUse administrative distance to control ad smaller priority static route ad defaults to 1Load Balancing650) this.width

-configureConfigurationOne, not authentication both routers s port no shutEncapsulation PPP under interfaceSho int s1/0 view LCP on status, configure interface address, view IPCP on status.Two. CertificationFirst Step dialer initiates chap callPPP Authentication CHAPLCP negotiated CHAP authentication mode and MD5 algorithmThe second step sends the challenge message to the dialer1, set up Challenge packet: ID random number authentication name2, pass the ID random number authentication name corres

During the preparation of the CCNA, the route has been in a state of confusion. Therefore, keep a record of your daily study notes so that you can view them later.There are two configurations for static routes, one is a static route with the next-hop address, and the other is a static route with a send-out interface.For static routes, the usage is as follows:One, the network contains only a few routersSecond, the network only through a single ISP acce

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Today continue to share some commands for the router's basic configuration. First look at our future configuration routing, partition VLAN used topology diagram, in the future we will use this topology map to complete the later experimental 650) this.width=650; "title=" capture.jpg "src=" http://s3.51cto.com/ Wyfs02/m01/6c/7d/wkiom1vkidjg8lilaadnhwbhx8e751.jpg "alt=" Wkiom1vkidjg8lilaadnhwbhx8e751.jpg "/>The commands we want to share today are:Line console 0 enters the debug port,Logging SYN Clo