Networking Lecture 13 - Medium Access Control

Outline:
0:05 Recap
2:22 Each layer solves a particular set of problems
3:26 Who implements each layer?
5:16 Terminology
7:21 Why does a router have multiple IP addresses?
7:59 Medium Access Control (MAC)
11:05 Multiple Access Protocols
12:52 Multiple Access Protocol Goals
14:18 Channel Partitioning Protocols
17:25 US radio spectrum (use of frequencies bands) & FCC
18:35 Zoomed-in view
22:25 Channel Partitioning Protocols
26:11 Wifi uses FDM to isolate different base stations
28:56 5Ghz WiFi adds another 9 to 25 channels
30:22 Wi-Fi Scanner Tool Demo
32:33 Random Access Protocols
35:07 ALOHA: an early random access protocol
38:03 ALOHA: expected throughput
40:36 CSMA/CD
43:17 Collisions are unavoidable
46:41 Collision Detection
49:29 CSMA/CD steps
49:34 Collision Detection
52:26 Taking-Turns Protocols
57:26 Token-passing protocols
59:28 Multiple access protocol summary
1:00:49 Recap
These lectures were delivered by Professor Steve Tarzia in Fall 2020 for the CS-340 Introduction to Computer Networking course at Northwestern University. Course materials and slides can be downloaded from stevetarzia.co...