ITM 301 Chapter Notes - Chapter 3: User Datagram Protocol, Transmission Control Protocol, Address Resolution Protocol

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 301
• Professor: Franklyn Prescod

Document Summary

Chapter 3 how data is transported over networks. Tcp/ip - a suite of protocols including: tcp, ip, udp, arp, and many others. Tcp/ip is open and routable: protocols add a header to data inherited from the layer above it. Layers 7, 6, and 5 - data and instructions, known as payload, are generated by applications running on source host. Layer 4 - usually tcp or udp adds a header to the payload. Includes a port number to identify the receiving app. Layer 3 - network layer adds it own header and becomes a packet. Layer 2 - packet is passed to data link layer on nic, which encapsulates data with its own header and trailer, creating a frame. Layer 1 - physical layer on the nic receives the frame and places the transmission on the network. Receiving host de-encapsulates the message at each layer in reverse order and presents payload to the receiving applications.