PROTOCOL

Generally it gives the meainging of rules and regulaitons.

It is also a common languages.

Such rules and regulations which have to follow by all the computers of network to establish.

Communication among them.

Types:

1.      TCP/iP( Transmission control protocol or internet protocol)

2.      DLC( date link control)

3.      Apple talk

4.      Net BEUI ( net bios extended user interface)

5.      IPX/SPX ( internet work packet exchange or sequential packet exchange)

6.      POP (post office protocol)

7.      IMAP( internet message access protocol)

8.      SMTP( simple mail transfer protocol)

9.      HTTP ( hyper text transfer protocol)

10.  FTP( file transfer protocol)

1.      TCp/iP: Most common protocol (maximum used ) also called native protocol of internet.

Developed by ARPANET (advanced research project agency network)

It has two versions:

Version 4 (v4)

Versions 6 (v6)

a)      Versions 4 : It consists 4 parts and each parts are separated by the dot. Eg.  _    .   _      .          _      .         _

Each part used o to 256 only, but first and last part doesnot used o to 255.

Eg. 200. 16. 24. 96

Each part is of 8 bits, so a TCP/iP is of 8*4 = 32 bits.

Frachtons and negative number are not used.

Classess:

A-    1-126

B -128-191

C-192-223

D- 223-239

E – 240-255.

Notes: 127 is reserved for loopback address, so it can't used to assign.