Quiz — Protocols
Quiz on DNS, HTTP/S, and common application protocols
Module 3 Knowledge Check — apply the protocols
You traced recursive vs authoritative DNS, treated HTTPS as channel encryption (not a honesty badge), contrasted FTP with SSH, and captured only your own packets. Ten APPLY scenarios. Scope is still your machine, example.com, or infrastructure you are authorized to touch. Next: TCP vs UDP Explained.
APPLY: getent hosts example.com returns an IPv4. Your stub talked to 1.1.1.1, which asked the example.com NS hosts. Which sentence is accurate?
APPLY: A user typed pay.example.com (correct) but DHCP handed the laptop a rogue DNS server that returns an attacker A record. What is the first failure?
APPLY: curl -I http://example.com shows 301 and Location: https://example.com/. curl -I https://example.com/ shows 200 and Strict-Transport-Security. What should you tell a teammate?
APPLY: A phishing page at https://secure-login-example.com has a valid padlock. The real bank is https://bank.example. Best conclusion?
APPLY: Why refuse production file transfer over classic FTP/21 in favor of SFTP on SSH/22?
APPLY: Which pair matches the jobs: (A) inject/relay a message to another domain (B) sync a mailbox on a phone?
APPLY: True or False: Pasting ~/.ssh/id_ed25519 into a ticket is acceptable if the mail server uses IMAPS 993, because TLS covers all secrets.
APPLY: Which two actions stay inside this module's ethical lab? (Select 2)
APPLY: ss -tuln on your laptop shows 0.0.0.0:21 and 127.0.0.1:22. You are about to join public Wi-Fi. Which bind is the bigger LAN exposure?
APPLY: True or False: After Protocols, the next lesson is TCP vs UDP Explained — multiplexing with ports, the three-way handshake as a concept, and when firewalls treat TCP and UDP differently.