1. Connectionless and Connection-Oriented Protocols Jungwoo Ryoo, Ph.D., CISSP, CISA

2. Network Protocol Types So many protocols  To divide the huge amount of work associated with exchanging messages Classified based on their roles  Application layer  Transport layer  Network layer  Data link layer  Physical layer Dr. J

3. Roles Associated with Protocol Types Application  Generates data  Consumes data Network  Delivers packets from one network to the other Data link  Delivers packets within the same network Physical  Turns frames into electronic signals  Sends and receives the signals Dr. J

4. Transport Layer Error detection  Damaged packets  Missing packets  Out of order packets Error correction  Resending packets Dr. J

5. Transport Layer Protocols Types TCP  Transmission Control Protocol  Connection-oriented  Three-way hand shaking To keep track of errors UDP  User Datagram Protocol  Connectionless Dr. J

6. Examples TCP  E-mail  HTTP UDP  Time-sensitive applications such as VoIP Video streaming Dr. J