TCP/IP

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.

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.

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.

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.

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.

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.

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).