Chapter 3 : Internet Services.

EMAIL is the transmission of messages and files via a computer network.

CHAT is a real-time typed conversation that take place on a computeror mobile device with many other unknown online users.

INSTANT MESSAGING or INTERNET MESSAGING SERVICES often occur in real-time. It is a communication services that notify you when one or more of your established contact are online and then allow you to exchange message or file or join private chat room with them.

MESSAGEBOARD is also can be called as 'online discussion' or discussion forum. it is an online are in which users have written discussions about a particular subject.

A discussion forum is hierarchical or tree-like in structure. A forum can contain a number of subforums, each of which may have several topics. Within a forum's topic, each new discussion started is called a thread, and can be replied to by as many people as so wish.

A MEDIA ACCESS CONTROL ADDRESS (MAC ADDRESS) , also called physical address, is a unique identifier assigned to network interface for communications on the physical network segment.

Internet Protocol version 4 (IPv4) is the fourth version of the internet protocol (IP). It is one of the core protocols of standards-based internetworking methodsin the internet, and was the first version deployed

Internet Protocol version 6 (IPV6) is the most recent version of the Internet Protocol (ip), the communications protocol that provides an identification and location system for computers on networks and routes traffic across the Internet.

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