ITM 301 Lecture Notes - Lecture 4: User Datagram Protocol, Link Layer, Transmission Control Protocol

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 301
• Professor: Farid Shirazi

Document Summary

The noise caused by heavy motors (vacuum) could corrupt data. Twisted pair cable: cross talk ->data signal from cable may leak it to other cable. Fiber optic: attenuation -> laser signal loses its strength at the end of cable: tcp/ip model. The network interface layer of tcp/ip is capable of what osi layer: tcp: transmission control protocol. Is a connection oriented protocol -> one-to-one connectivity. Transfer data (segment) from one location to the other: udp (user datagram protocol) Is a connection less oriented protocol -> is a broadcast protocol. By default tcp & udp one labeled as part of the os. A firewall is designed to close unwanted parts: a socket is defined as ip + port, important ports: 22 ssh secure shell (secure modem access) 443 https = http + ssl (secure socket layer) or http + tls (transport layer socket)