I. HTTP :
Hypertext
Transfer Protocol
It
is an application protocol for distributed, collaborative, hypermedia
information systems. HTTP is the foundation of data communication for the World
Wide Web. Hypertext
is a multi-linear set of objects, building a network by using logical links between
the nodes. HTTP is the protocol to exchange or transfer hypertext.
II. FTP : File
Transfer Protocol
It
is a standard network protocol used to transfer files from one host to another
host over a TCP-based network, such as the Internet. FTP is built on a
client-server architecture and uses separate control and data connections
between the client and the server. FTP users may authenticate themselves using
a clear-text sign-in protocol, normally in the form of a username and password,
but can connect anonymously if the server is configured to allow it. For secure
transmission that hides (encrypts) the username and password, and encrypts the
content,
III. IP : Internet
Protocol
It
is the principal communications protocol used for relaying datagrams across an
internet work using the Internet Protocol Suite. Responsible for routing
packets across network boundaries and has the task of delivering datagrams from
the source host to the destination host solely based on the addresses. It is
the primary protocol that establishes the Internet.
IV. TCP : Transmission
Control Protocol
It is one of the core
protocols of the Internet Protocol Suite. Complementing the Internet Protocol
(IP), and therefore the entire suite is commonly referred to as TCP/IP.
TCP provides reliable, ordered delivery of a stream of octets from a program on
one computer to another program on another computer. TCP is the protocol used
by major Internet applications such as the World Wide Web, email, remote
administration and file transfer.
V. POP3 : Post Office
Protocol (version 3)
It
is an application-layer Internet standard protocol used by local e-mail clients
to retrieve e-mail from a remote server over a TCP/IP connection. POP
and IMAP (Internet Message Access Protocol) are the two most prevalent Internet
standard protocols for e-mail retrieval. Most webmail service providers such as
Hotmail, Gmail and Yahoo! Mail also provide IMAP and POP3 service.
VI. SMTP : Simple Mail
Transfer Protocol
It
is an Internet standard for e-mail transmission across IP networks. While
electronic mail servers and other mail transfer agents use SMTP to send and
receive mail messages, user-level client mail applications typically only use
SMTP for sending messages to a mail server for relaying.
VII. DNS : Domain Name
System
It
is a hierarchical distributed naming system for computers, services, or any
resource connected to the Internet or a private network. A DNS resolves queries
for these names into IP addresses for the purpose of locating computer services
and devices worldwide. By providing a worldwide, distributed keyword-based
redirection service, the Domain Name System is an essential component of the
functionality of the Internet.
VIII. Telnet :
It
is a network protocol used on the Internet or local area networks to provide a
bidirectional interactive text-oriented communications facility using a virtual
terminal connection. User data is interspersed in-band with Telnet control
information in an 8-bit byte oriented data connection over the TCP.
