Almost all communications, such as browsing websites, sending and receiving e-mails, and using social networking messaging applications, are based on TCP/IP, which is, so to speak, the common language of networking. Therefore, understanding how TCP/IP works is very important for learning network technology.

The following articles will explain how the various protocols of TCP/IP work.

nslookup command : Verifying DNS name resolution

The nslookup command is used to manually verify DNS name resolution.
This section explains how to use the nslookup command and provides examples of command execution.

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DHCP : Automatically Assign IP Address

DHCP is the protocol used to automatically distribute IP addresses and other TCP/IP configurations.
DHCP is a very commonly used protocol. It is important to understand how it works.

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Cisco IOS DHCP Server Configuration and Verification Commands

You can use a Cisco router as a DHCP server to distribute IP addresses to DHCP clients.This section describes the configuration and verification commands to make a Cisco router (Cisco IOS) act as a DHCP server.

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Cisco Router DHCP Server Configuration Example

Configure the Cisco router as a DHCP server; configure a DHCP relay agent and manual binding to assign a specific IP address.

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TCP/IP Configuration Summary

In order to communicate using TCP/IP, it is a prerequisite that TCP/IP is properly configured.
This section explains the meaning of IP address/subnet mask, default gateway, and DNS server configurations.

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ipconfig command : To verify TCP/IP configurations on Windows OS

The ipconfig command is used to verify TCP/IP configuration on Windows operating systems.
This section describes the format of the ipconfig command and frequently used options.

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Commands to Verify TCP/IP Configuration On Linux (Ubuntu)

This section describes commands to verify IP address/subnet mask, default gateway, and DNS server IP addresses on Linux(Ubuntu).

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