Protocols
An instant messenger is a computer application which allows instant text communication between two or more people through a network such as the Internet.
Visualization of the various routes through a portion of the Internet
In the general sense, an internet (with a lowercase "i", a shortened form of the original inter-network) is a computer network that connects several networks. As a proper noun, the Internet is the publicly available internationally interconnected system of computers (plus the information and services they provide to their users) that uses the TCP/IP suite of packet switching communications protocols. Thus, the largest internet is called simply "the" Internet. The art of connecting networks in this way is called internetworking.
A computer network is a system for communication among two or more computers.
Computer networks may be categorized with respect to range:
personal area network (PAN)
wireless PAN
local area network (LAN)
wireless LAN
metropolitan area network (MAN)
wide area network (WAN)
(Tiny area network (TAN)
DomainKeys is an e-mail authentication system designed to verify the DNS domain of an E-mail sender and the message integrity. The DomainKeys specification has adopted aspects of Identified Internet Mail to create an enhanced protocol called DomainKeys Identified Mail (DKIM). This merged specification is the basis for an IETF Working Group which plans to guide the specification towards becoming an IETF standard.
A website (alternatively, Web site or web site) is a collection of Web pages, images, videos and other digital assets that is hosted on one or several Web server(s), usually accessible via the Internet, cell phone or a LAN.
A Web page is a document, typically written in HTML, that is almost always accessible via HTTP, a protocol that transfers information from the Web server to display in the user's Web browser.
All publicly accessible websites are seen collectively as constituting the "World Wide Web".
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