KNOW OUR PORT ON COMPUTER PART III

Maybe we are familiar with the term port number, but for the
not know the port is a hole that allows a (data)
to enter it. Computers can be said to have 2 types of ports,
the physical ports and port software. Physical port is a slot wrote
There on the back of the CPU, while the port is the port software
used by the software when making a connection with another computer.
which is directly related to our activities as playing with
Internet is
port software. Port of this software we can distinguish
into 3, namely:

a) The well known ports
port of this type have a range of 0-1023, originally only had
range from 0-255 but by the IANA (Internet Assigned Number Authority)
range was extended into early mentioned. In most
port system in this range can only be used by root, or by
program run by the user. Because of his range from 0-1023 then
port2 known as ftp (21), ssh (22), telnet (23), http (80) including
in this species.

b) Registered Ports
have a range of 1024-49151, port type is not intended to
certain service from a server. So what's the point?? hehehe....,
port in this range typically used by such utlites Networking
Browser, Email Client, FTP software to communicate with a remote
server. Usually Networking utlites will open random ports on
this range to connect to remote servers. Port number on the range
this is what makes us able to do discovery on the Internet, do
checking e-mail, and others. So useful is it? hehehe ..... This port will
opened while when we are running an application
so if we close the application then automatically
This port would be closed by itself (remember Networking utlites
open it at random)

c) The Dynamic / Private Ports
have a range of 49152-65535, usually used by some
large trojan (waaaaaaaa..), but there are also programs that memkai port
This particular range of programs that require large port number,
like the Sun RPC is running on port 32,768.



I hope this can add to our knowledge about the world of computers

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