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Protocols
A set of rules and conventions for sending information over a network. These rules govern the content, format, timing, sequencing,
and error control of data exchanged among network devices.
The protocols relevant to networks, internet, and e-mail are;
- TCP / IP
- IPX/SPX
- FTP
- X.25
- POP3
The most well known of all protocols is Transmission Control Protocol / Internet Protocol, or TCP/IP for short.
This is in fact a family of protocols and is used to provide low level functions required by many applications as
well as specific tasks, e.g. transferring files, sending mail, or finding out who is 'logged on' within a network. The
protocol basically defines how computers communicate, and the conventions for connecting networks and routing the traffic.
TCP
A connection-based Internet protocol responsible for breaking
data into packets, which the IP protocol sends over the network. This protocol provides a reliable sequenced communication stream.
IP
The messenger protocol of TCP/IP, responsible for addressing and sending
TCP packets over the network. IP provides a best-effort, connectionless delivery system that does not guarantee that packets arrive at their
destination, or that they are received in the sequence in which they were sent.
IPX/SPX
The transport protocols used in Novell NetWare networks.
FTP
File Transfer Protocol supports several commands that allow
bi-directional transfer of binary and ASCII files between systems, the FTP client is installed with the TCP/IP utilities and is supported by
most web browsers.
X.25
A recommendation published by the CCITT international
communications standards organisation that defines the connection between a terminal and a packet switching network.
An X.25 network is a type of packet switching network that routes units of information (packets) as specified by the protocol, and is
most often found in public data communications networks.
POP3
Post Office Protocol (Version 3) is intended to permit a
workstation to dynamically access a maildrop on a server host. Usually this means that this protocol is used to allow
computer to retrieve mail that a server is holding for it.
Initially the server host starts the POP3 service by listening on TCP port, when a client wishes to make use of the service
it establishes a TCP connection with the server host and the POP3 server will send a greeting. The client and POP3 server
then exchange commands and responses until the connection is closed or aborted.
For any further information please feel free to contact us.
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