SOME IMPORTANT PROTOCOL AND THEIR WORK

      

•  ICMP (Internet Control message Protocol) - For connection      troubleshooting.

   

• ARP (Address Resolution Protocol) Used to resolve IP to MAC address.

   

• RARP( Reverse Address Resolution Protocol) Used to resolve MAC to IP.

   

• DHCP( Dynamic Host Configuration Protocol ) Used to provide automatic IP address

   

• HTTP (Hyper Text Transfer Protocol ) Used to access web pages from browsers.

   

• SMB ( Service Message Block ) Used to share resources for windows PCs.

   

• NFS ( Network File System ) Used to share resources between windows and Unix OS.

   

• IGMP (Internet Group Message Protocol ) Used to send messages to multiple hosts .

   

• SMTP ( Simple Mail Transfer Protocol ) Used to send email.

   

• POP ( Post Office Protocol ) Used to receive mail

   

• IMAP ( Internet Message Access Protocol ) Used to receive mail.

   

• NNTP ( Network News Transfer Protocol ) Used to send news to a group 

   

• NTP( Network Time Protocol ) Used to update time of all network devices.

   

• FTP ( File Transfer Protocol ) Used to download and upload files in intranet or internet.

   

• TFTP ( Trivial File Transfer Protocol ) Used to download and upload files but less secure than  FTP

   

• RDP ( Remote Desktop Protocol ) Used to access remote desktop

   

• TCP ( Transmission Control Protocol ) Used to deliver data from one device to another .

   

• UDP ( User Data gram protocol ) Used to deliver data but it is connection less

   

•  RIP ( Routing Information Protocol ) Used for Dynamic Routing.

   

• OSPF ( Open Shortest Path First ) Used for Dynamic Routing.

   

• BGP ( Border Gateway Protocol ) Used for Routing between two AS.

   

• IS-IS ( Intermediate System to Intermediate System) Use for routing.

   

• PPTP ( Point to Point Tunneling Protocol ) Used for tunneling in VPN.

   

• L2TP ( Layer 2 Tunneling Protocol ) Used for tunneling.

   

• SSTP ( Secure Socket Tunneling Protocol ) Used for tunneling

   

• CHAP ( Challenged Handshake Authentication Protocol ) Used for authentication.

   

• PPP ( Point to Point Protocol ) Used for frmaing.

   

• STP (Spanning Tree Protocol ) Used to prevent loop in switches.

   

• VTP (Virtual Trunking Protocol ) Used for trunking in switches.