COMP247 Lecture Notes - Lecture 2: Network Layer, Bob Kahn, Vint Cerf

• School: Macquarie University
• Department: Computing
• Course: COMP247
• Professor: Damian Jurd

Document Summary

Frames can be sent by two computers on the same network at the same time. A single physical network segment in a lan forms a collision domain. A broadcast domain is a part of a network where all nodes can reach each other by broadcast at the data link layer (think of a broadcast domain like a closed lecture hall. Ever(cid:455)o(cid:374)e i(cid:374) there (cid:272)a(cid:374) hear the le(cid:272)turer, (cid:271)ut the le(cid:272)ture hall (cid:374)e(cid:454)t door (cid:272)a(cid:374) t hear them) Collision domains are generally smaller than and contained within broadcast domains. Fragment-free switching: reads the first 64-byte segment (containing the header), performs an error check before sending. Tcp/ip 5-layer network model: when a request is made, a http header is added to it on the application layer, tcp header is added on the transport layer.