Packets, routers and IP addresses

Definition of InternetThe Internet is a computer network around the whole world, that provides a variety of information and communication facilities.

What is the link between domain names and IP addresses?

The IP address and domain name are two different identities, but their roles are same to the world. They are connected and supporting each other, the IP address needs the domain name to function properly. So does to domain name, it cannot go online without connecting to IP address.

The difference is the fact that the domain name is an Internet service that translates domain names/hostnames to IP addresses (forward DN) and IP addresses to their associated domain names/hostnames (Reverse DN) with the help of a DN server.

 What is data packets?What is packet switching?

data packets A packet is a basic unit of

communication over a digital network. A packet is also called a datagram, a segment, a block, a cell or a frame, depending on the protocol. When data has to be transmitted, it is broken down into similar structures of data, which are reassembled to the original data chunk once they reach their destination.

packet switching

This is a method of breaking data files into small packets or chunks in order to send them across a network.

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The routers determine where to send information from one computer to another. Routers are specialized computers that send your messages and those of every other Internet user speeding to their destinations along thousands of pathways. A router has two separate, but related, jobs: It ensures that information

doesn't go where it's not needed. This is crucial for keeping large volumes of data from clogging the connections of "innocent bystanders."

It makes sure that information does make it to the intended destination.

The Function of Routers

Sources http://

computer.howstuffworks.com/internet/basics/internet-infrastructure3.htm

http://www.ntchosting.com/encyclopedia/dns/ip-address/

http://www.teach-ict.com/technology_explained/packet_switching/packet_switching.html