COMMUNICATING ACROSS THE INTERNET

GCSE COMPUTING - IP ADDRESSING AND DNS SERVERS

What is the internet?

The majority of the internet is made up of fibre optic cables running deep underground. Also it's a perfect example of a wide area network (WAN), as it's got more than one geographical location.

What is the need for IP addressing and what is the role of the DNS servers in this?

Need for IP addressing

An Internet Protocol address (IP address) is a numerical label that is assigned to any device participating in a computer network that uses the Internet Protocol for communication between its nodes.


Role of the DNS servers

A DNS server provides name resolution for TCP/IP-based networks. That it makes possible for users of client computers to use names rather than numeric IP addresses to identify remote hosts. A client computer sends the name of a remote host to a DNS server, which responds with the corresponding IP address. The client computer can then send messages directly to the remote host's IP address.



Big image