计网实验TCPIPConfiguration

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Test 1. TCP/IP Configuration

1. Click Start and then click Run. Type the command or cmd and then press Enter.

2. At the DOS prompt, type NET HELP and press Enter. You should see something like the screen below:

The command you are interested in is the View command. To obtain information about it, type NET HELP VIEW, and press Enter.

3. What is the purpose of NET VIEW:

The NET VIEW command shows the names of the machines present on your network. Notice that it lists the names of machines on the left, in column labelled “Server name” and another column labelled “Remark”

4. List the machines after you have typed NET VIEW from the command prompt

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Close the DOS window by typing EXIT on the command line and then press Enter, or by clicking the Close button in the upper right corner of the window.

Obtain the TCP/IP Configuration Information Use the Start menu to open the Command Prompt, an MS-DOS-like window. Press Start > Programs > Accessories > Command Prompt or Start > Programs > Command Prompt.

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The following figure shows the Command screen. Type ipconfig and press the Enter key. The spelling of ipconfig is critical while case is not. It is short for IP Configuration.

This first screen shows the IP address, subnet mask, and default gateway. The IP address and the default gateway should be in the same network or subnet, otherwise this host would not be able to communicate outside the network. In the figure the subnet mask tells us that the first three octets must be the same to be in the same network.

Note: If this computer is on a LAN, the default gateway might not be seen if it is running behind a Proxy Server. Record the following information for this computer.

Record the following TCP/IP information for this computer 6.

Compare the TCP/IP configuration of this computer to others on the LAN 7.If this computer is on a LAN, compare the information of several machines.

Record a couple of the IP Addresses:

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1) IP sddresses 1: 192.168.156.57

2) IP addresses 2: 192.168.156.66 Are there any similarities? 前三个字段相同，

What is similar about the IP addresses? 最后字段存在差异

What is similar about the default gateways? 完全相同

The IP addresses should share the same network portion. All machines in the LAN should share the same default gateway.

Check additional TCP/IP configuration information

To see detailed information, type ipconfig /all and press Enter. The figure shows the detailed IP configuration screen.

The host name, including the computer name and NetBIOS name should be displayed. Also, the DHCP server address, if used, and the date the IP lease starts and ends should be displayed. Look over the information. Entries for the DNS, used in name resolution servers, may also be present.

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