opbang

 Profile Answers by opbang 

• Sep 25th, 2006

 

ports are like different gates of the building. Each gate is having its own function.

HTTP Port ....  it will allow only HTTP people... It communicates in HTTP protocol.. any request with http://  ....    HTTP.. is Hyper Text Transfer Protocol

FTP Port : File Transfer Protocol....  used to upload and download files..... used to update websites from the local machine... it requires FTP host name, username and password..    and on the host machine FTP services should be enabled.

Telnet port:  telenetting with other computer in hybrid environment...  from thin client to server..

 

 

 

Sudhir

• Oct 21st, 2007

 

Definition:-

1) On computer and telecommunication devices, a port is generally a specific place for being physically connected to some other device, usually with a socket and plug of some kind. Typically, a personal computer is provided with one or more serial ports and usually one parallel port. The serial port supports sequential, one bit-at-a-time transmission to peripheral devices such as scanners and the parallel port supports multiple-bit-at-a-time transmission to devices such as printers.

2) In programming, a port is a "logical connection place" and specifically, using the Internet's protocol, TCP/IP, the way a client program specifies a particular server program on a computer in a network. Higher-level applications that use TCP/IP such as the Web protocol, Hypertext Transfer Protocol, have ports with preassigned numbers. These are known as "well-known ports" that have been assigned by the Internet Assigned Numbers Authority (IANA). Other application processes are given port numbers dynamically for each connection. When a service (Server program) initially is started, it is said to bind to its designated port number. As any client  program wants to use that server, it also must request to bind to the designated port number.

Port numbers are from 0 to 65536. Ports 0 to 1024 are reserved for use by certain privileged services. For the HTTP service, port 80 is defined as a default and it does not have to be specified in the Uniform Resource Locator (URL).

HTTP PORT NO.    - 80

FTP PORT NO.       - 21

TELNET PORT NO. - 23



Answered By:- Er. Sudhir Meena