Computer generated processes require unique address to send and receive information. Port numbers are used for that purpose.
Process socket is a combination of host IP and process port number. Easy example is the Telnet service that is using port 23 by default. Knowing host IP address (for example 12.34.45.56) the socket address can be created (12.34.45.56:23). Even though Telnet’s default ...
DNS is the hierarchical way of associating domain names with IP addresses. It includes the network of databases and computers, together with the Application layer service. DNS is relying on multiple databases spread out across the globe, instead of using single file.
DNS can be divided to the components for effectiveness:
Resolvers are the clients that require domain name information. HTTP is ...
