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Networking Foundations – Quick Fire
Networking Foundations – Quick Fire A fast revision of Part 1: private vs public IP, CIDR, well-known ports, the TCP 3-way handshake, OSI vs TCP/IP. Firewalls, IDS rules and logs all use these basics. You cannot read an alert without them. Practise explaining each in one or two plain sentences, as y
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What this card says
What it is
A fast revision of Part 1: private vs public IP, CIDR, well-known ports, the TCP 3-way handshake, OSI vs TCP/IP.
Why it matters for security
Firewalls, IDS rules and logs all use these basics.
You cannot read an alert without them.
Tip
Practise explaining each in one or two plain sentences, as you would in an interview.
| Exercise | Task |
|---|---|
| E1 | Is 10.0.5.20 public or private? Why does NAT matter for… |
| E2 | Port 22 vs 80 vs 443 vs 3306 – service + risk one-liner each |
| E3 | Explain SYN flood idea in two lines – defence angle only |
| E4 | Map "DNS" and "TLS" to OSI-ish layers students mix up |
| E5 | Sahyadri Traders Pune office: which ports must stay closed… |
Learn more in the lesson: 45.2 Networking Foundations – Quick Fire