Protocols:
A protocol is a set of
rules and guidelines for communicating data. A protocol is a standard used to
define a method of exchanging data over a computer network such as local area
network, Internet, Intranet, etc. Each protocol has its own method of how data
is formatted when sent and what to do with it once received, how that data is
compressed or how to check for errors in data.
Network protocols serve
these basic functions:
- Address data to the correct recipient(s)
- Physically transmit data from source to destination, with security protection if needed
- Receive messages and send responses appropriately.
TCP/IP:
Short for Transmission
Control Protocol/Internet Protocol, TCP/IP is a set of rules (protocols)
governing communications among all computers on the Internet. More
specifically, TCP/IP dictates how information should be packaged (turned into
bundles of information called packets), sent, and received, as well as how to
get to its destination. TCP/IP was developed in 1978.
How does TCP/IP work?
As the name implies,
TCP/IP is a combination of two separate protocols: Transmission Control
Protocol (TCP) and Internet Protocol (IP). The Internet Protocol standard
dictates the logistics of packets sent out over networks; it tells packets
where to go and how to get there. IP has a method that lets any computer on the
Internet forward a packet to another computer that is one or more intervals
closer to the packet's recipient. You can think of it like workers in a line
passing boulders from a quarry to a mining cart. The Transmission Control
Protocol is responsible for ensuring the reliable transmission of data across
Internet-connected networks. TCP checks packets for errors and submits requests
for re-transmissions if any are found.
(FTP)File Transfer
Protocol:
File Transfer Protocol
(FTP) is a client/server protocol used for transferring files to or exchanging
files with a host computer. It may be authenticated with user names and
passwords. Anonymous FTP allows users to access files, programs and other data
from the Internet without the need for a user ID or password. Web sites are
sometimes designed to allow users to use 'anonymous' or 'guest' as a user ID
and an email address for a password. What File Transfer Protocol can do:
- Transfer files between computers.
- Remove directories.
- List files.
Telnet :
Telnet (short for TErminal NETwork) is a network protocol used to provide a command line interface for communicating with a device.
Telnet is used most often for remote management but also
sometimes for the initial setup for some devices, especially network hardware
like switches, access points, etc. Managing files on a website is also
something Telnet is sometimes used for. Telnet is sometimes written in
uppercase as TELNET and may also be misspelled as Telenet.
The Telnet Protocol:
The Telnet protocol is designed to provide a
bi-directional, eight-bit byte oriented communications facility to allow for aa
standard method of interfacing terminal devices and processes.
- Telnet is not the same thing as other TCP/IP protocols like HTTP, which just let you transfer files to and from a server. Instead, the Telnet protocol has you log on to a server as if you were an actual user, granting you direct control and all the same rights to files and applications as the user that you're logged in as.
