Network models practice assessment. Applied

This is a scored practice assessment. It is not timed. Use it to identify weak domains before a timed attempt.

12 questions

A DNS issue is most defensibly debugged by:

dns

Scenario: You must choose UDP over TCP. What trade-off are you accepting?

transport

NAT is operationally 'stateful' because:

nat

Scenario: TLS fails for one site but HTTP works elsewhere. What is the first evidence to check?

tls

Scenario: You can resolve DNS but cannot reach the IP. What layer is most implicated?

routing

Scenario: A TCP connection stalls under load. What is a defensible next check?

transport

Scenario: A change 'fixed' DNS for one person but not others. What is the most likely reason?

dns

Scenario: You can connect from inside the network but not from outside. What is a primary suspect?

firewalls

Scenario: DNS and TCP work, but the site returns 502. What does that suggest?

http

Scenario: TLS fails only for one hostname. What is the most likely cause?

tls

Scenario: Users complain of slowness but there are no errors. What is the most defensible first measurement?

latency

Scenario: Traffic works one way but not the return path. What is this often called?

routing

Add CPD reflection (optional)

One short paragraph makes your CPD evidence much stronger.

For one incorrect answer, write down the evidence you would collect (commands, logs, timings) and the single layer you would test first.

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