Purchase the slides I used in my videos here:
https://www.jamesgan.net/igcsecs
0:00 Structure of a data packet and packet switching
9:25 Types and modes of data transmission
16:45 USB
19:25 Methods of error detection
21:12 Method 1: Parity Check
28:01 Method 2: Checksum
31:18 Method 3: Echo Check
33:13 Method 4: Automatic Repeat Request
35:20 Method 5: Check Digit
38:32 Symmetric and Asymmetric Encryption
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