ccna textbook

1, backup configuration to TFTP2, from TFTP COPY to run3. Back up iOS4. Upgrade iOS5, if the upgrade fails the workaroundOne, backup restore configuration1, to ensure that the router and computer (TFTP server) network IP (direct connection, same

First, the function1.MAC Address Learning2. Confirm the forwarding and filtering of frames3. Prevent loopsSecond, the way of frame exchange1. Passthrough forwarding: The switch detects the destination address immediately after forwardingFast forward

In a strange environment, if you want to reach a certain location, there are three methods: the first method is to ask a wizard, as long as you want to clearly describe the destination, you don't have to worry about it along the way. The Wizard will

Above we have realized that RIP (routing Information Protocol) &EIGRP (Enhanced Gateway Routing protocol), we come to know the following routing protocol OSPF (Open Shortest Path precedence protocol) also called it as an interface-sensitive routing

Which layer in the OSI Reference Model was responsible for determining the availability of the receiving program and Checki Ng to see if enough resources exist for that communication?A. TransportB. NetworkC. PresentationD. SessionE. ApplicationTest

of the Switch MAC Address learning Situation:1. Receive the data frame from an interface, look up the MAC Address table of the switch according to the original MAC address of the data frame, if not found, will add the original MAC address of the

1. RIP (Route Information protocol) routing Information selection protocol RIP is a distance vector routing protocol, which has two versions: V1 and V2. It belongs to the characteristics of RIP1. use the number of hops as the metric value. The

(I) install gns3If the installation process prompts that winpacp has been installed, select "cancel" (Ii) Configure basic gns3 Parameters Select Step 1 General:Configure two locations① Path for storing the Topology② Store temporary

Configuration file BackupMake the changed configuration a new startup configurationCopy running-config Startup-config Save the configuration to the startup profile and change it immediately.Restore the device to its original configurationIn

· Dynamic Routing : a route that can be self-adjusted based on network structure or traffic changes· category :1. Distance vector Routing Protocol (DV): RIP, IGRP Send routing entry via routing protocol2, Link State routing Protocol (LS): OSPF,

Auto is passive, desireable is activeAcive is active, passive is passive, different manufacturers recommend configuring onSW1 (config) #int range f0/1-2SW1 (config-if-range) #channel-group? Channel Group numberSW1 (Config-if-range) #channel-group 1%

First, the OSPF characteristics: 1.IETF Standard: Open room agreement, supported by different manufacturer's equipment 2. No loop by protocol: the implementation of SPF algorithm, will not produce loops 3. No class routing protocol: Support for

(1) interconnection between the VLAN: single-arm routing (2) Each PC can automatically obtain IP address: DHCP (3) Two switches require VLAN2 to go above, VLAN3 go below: STP load Balancing (4) SW2 can learn from SW1 VLAN related information:

[Lab environment] Cisco Packet Tracer 5.3.2 [PURPOSE] Simulate IOS damage on a Cisco device and practice how to fix IOS in ROM Monitor mode [Experiment topology] Lab procedure] 1. Connect the device according to the topology: Cisco devices do not

1. Functions of the data link layer Implements data error-free transmission. It receives raw data from the physical layer to form frames and bit groups) and transmits data between network devices. The frames contain the physical addresses of the

CDPCommand Show cdp neighbors displays connected network devices Show cdp display CDP Global Information Show cdp entry * displays all information about all adjacent routers. Show cdp entry WORD (vro name) displays all information about the vro. Un

This article lists the basic configurations and common configuration commands of Cisco routers in detail for actual operation problems. I believe this article will help you. Start the interface and assign an IP Address:Router>Router> enableRouter

Access Control List (ACL) is a List of router interface commands used to Control inbound and outbound data packets. ACL applies to all routing protocols, such as IP, IPX, and AppleTalk. The ACL is also defined based on each protocol. If the router

IP subnetting and variable length subnet masks (vlsm) Subnetting Basics Advantages of subnetting: 1. reduce network traffic 2. Improve Network Performance 3. simplified management 4. Easy to expand geographic scope How to creat subnets How do I

Refer to the exhibit, Host A pings interface s0/0 on Router 3, what's the TTL value for that ping?650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M01/8B/80/wKioL1hP7uixEixbAAH9oTpw4uM620.png "title=" QQ picture 20161213205137.png "alt=" Wkiol1