Pre Security module 5, OSI Model — the seven layers and what each does, addresses and devices per layer, TCP vs UDP, and encapsulation.
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#udp
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Pre Security module 5, Packets & Frames — packet vs frame, IP and TCP headers, the three-way handshake and close, UDP, and port numbers and ranges.
Resource Cheatsheet
Full class notes for TryHackMe Pre Security (2026 path) module 5, OSI Model: the seven layers, what each one does, TCP versus UDP, and encapsulation.
Lesson Note
Full class notes for TryHackMe Pre Security (2026 path) module 5, Packets & Frames: packets vs frames, the TCP/IP model, TCP headers and the three-way handshake, UDP and ports.
Lesson Note
Professor Messer A+ 220-1201 networking primer — encapsulation, TCP vs UDP, multiplexing, IP addresses, well-known vs ephemeral ports, reading a protocol decode.
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