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With the popularization of Switch Applications, VLAN technology is also widely used. As we all know, VLAN technology is mainly used to combine computers distributed in different geographic locations into a logical network as needed, while VLAN

Since the computers in the two data centers have been interconnected through the HUB, and the connection between the two data centers is only required to Ping each other and access each other through "Network neighbors", there is no need for routing.

I. Overview of rip selection protocols1.1. rip (routing infomation protocol) is a typical distance vector routing protocol.1.2. How rip works: RIP defines two types of message request message and Response Message. The request message type is used to

The router is easy to use, but the wireless network configuration on the computer is hard to understand. Many people like this, including my computer master. In fact, the configuration method on the computer is very good, but sometimes when you

Tool used in the experiment: Xiao fan SimulatorSubnet 1. Change the device name and activate the portSW1Router>Router> enableRouter # config terminalRouter (config) # hostname 2L-sw1-jin2L-sw1-jin (config) # interface range f0/0, f0/152L-sw1-jin

A parent-child multi-domain environment, and China belongs to the asia subdomain. There is a file server in China and the NTFS permission needs to be set. What are the differences between different security groups when permissions are set? For

  In an OSPF network, Region 0 is the backbone area, and other non-backbone areas must be directly connected to the backbone area. According to the topology, we can see that area 1 is directly connected to backbone area 0, while area 2 is not

  In the subnetwork division of an AD site, what is the basis for determining which site the PC belongs? IP address or specified DNS? Can you describe how domain user login works with the site subnet? Including the DNS server specified by the client

Today, I saw Zheng sir's multicast Lecture 2. I added my notes and learned it myself. Old rules are not reprinted. The first is not enough, and the second is to respect my work.1. Send register-stop when no members of the rp group are found.2.

  Packet Capture is often required during network testing. Of course, many testing tools are available, such as sniffer and ethreal. however, TCPDump is the most convenient and simple method. this tool is basically included in Linux releases.

  After a busy afternoon, I finally found the root cause. As long as a laptop can find your wireless signal and access the Internet, it means that the wireless router is good and the settings are basically correct, the root cause of the failure to

    Localhost 127.0.0.1 Local IP Address Network Not connected to www.2cto.com Not connected Networking Transmission No Nic, no firewall or Nic restrictions Nic transmission,

  1. Complete data packet format Ethernet header | ip header | tcp (udp) header | Application Data | Ethernet tail | \/ Appl header | user data     2. Link Layer format   Destination Address | source address | length | dsap | ssap | cntl | org code |

It seems that different types of writing are not the same. Even the is vague. Because the port priority is not mentioned, it is estimated that it is merged to the port ID. In the : 1. The lowest root bridge ID 2. The lowest path overhead to reach

This time, the "protocol" field in the ip header will be used separately. As shown in the preceding figure, all TCP, UDP, ICMP, and IGMP data are transmitted in ip datagram format. TCP and UDP data packets are delivered to the upper layer, that is,

Required DevicesThe following are the required devices for this lab:1) A Cisco router has an Ethernet port and two serial ports;2) A Cisco router with an Ethernet port and a serial port;3) a router with a serial port;4) Cisco IOS 10.0 or later;5) a

VroSh access-listSh enviSh harShow processes cpuShow versionShow processes memoryShow ip interface briefShow interface descShow diagShow cdp neighborsShow cdp neighbors detailShow arpShow ip protocolsShow ip ospfShow ip ospf interfaceShow ip ospf

1. static IP routing 1. 1. A simple route table Routing is one of the most important functions of the IP layer. The previous section briefly describes the rules used by the router to select a route based on the IP address of the IP packet. We will

Currently, many TCP-based network protocols are available, including telnet, ssh, ftp, and http. These protocols can be roughly divided into two categories based on data throughput: (1) interactive data types, such as telnet and ssh. In most cases,

Symptoms: The HP laptop is connected to the wireless network and the network address is being obtained.Solution: 1. Go to the BIOS to view the wireless Nic settings and enable the settings;2. Go to the system and check whether the wireless switch is