internet protocols and network hardware

internet protocols and network hardware

1. why do we need protocols

   • protocol in computer networks defines rules and conventions for communication between network devices. Protocols for computer networking all generally use Packet Switching techniques to send and receive messages in the form of packets.  Modern operating systems like Microsoft Windows contain built-in services or daemons that implement support for some network protocols.  Applications like Web browsers contain software libraries that support the high level protocols necessary for that application to function. For some lower level TCP/IP and routing protocols, support is implement-  ed in directly hardware (silicon chipsets) for imporved performance.

2. TCP/IP

   • IP
     • ensures data is delivered to correct address
   • TCP
     • ensures data is transmitted accurately
     • all eight packets have been delivered
     • ensures no duplication
   • every device has unique IP ADDRESS