A dialup connection uses regular phone lines to connect one computer to another via modem. Generally, a domain corresponds to an IP address or an area on a host . This allows users to specify remote computers by host names rather than numerical IP addresses. The advantage of the DNS is that you don't have to remember numerical IP addresses for all the Internet sites you want to access. A method by which computer users can exchange messages with each other over a network.
Email is probably the most widely-used communications tool on the Internet .
One of Email's advantages is its ability to be forwarded and replied to easily. Your email address is made up of several parts. By convention, addresses use lowercase letters with no spaces. The first part of the address, the username, identifies a unique user on a server . Large servers, such as those used at universities or large companies sometimes contain multiple parts, called subdomains.