COMMUNICATING ACROSS THE INTERNET
GCSE COMPUTING - IP ADDRESSING AND DNS SERVERS
What is the internet?
Fibre optic cables
This is an image of fibre optic cables that travel deep underground to connect people to the internet.
WIDE AREA NETWORK (WAN)
This image represents the way wide area network operates.
Fibre optic cables around the world
This is an image of fibre optic cable that connects people around the world to the internet.
What is the need for IP addressing and what is the role of the DNS servers in this?
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.