Network security
⏱ ~3-min readAceMark Guide
What this topic is really about
MAC flooding fills the switch CAM table so the switch begins flooding frames out all ports, letting an attacker capture traffic. ARP poisoning corrupts ARP caches, DNS spoofing returns false records, and VLAN hopping crosses VLAN boundaries via tagging tricks.
Least privilege grants users the minimum access required, limiting damage from compromised accounts. Defense in depth uses layered controls, zero trust verifies every request, and implicit deny blocks anything not explicitly allowed.
See the mechanism
HTTPS uses TCP port 443 for TLS-protected HTTP. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.
An exam-style question, fully explained
Which logical port is used by HTTPS by default?
- Identify what the question tests: Which logical port is used by HTTPS by default.
- HTTPS uses TCP port 443 for TLS-protected HTTP.
- Port 80 is plain HTTP, 8080 is a common alternate HTTP port, and 22 is SSH.
Traps the examiner sets
- Port 80 is plain HTTP, 8080 is a common alternate HTTP port, and 22 is SSH.
Test your recall
Answer each from memory — you'll see instantly whether you're right and why.
Run a focused 10-question mini-mock on Network security and see it stick.
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