Module 10 · Network models · Drill

Network models drill

Scenario prompts that check whether network models is usable under pressure. Answer out loud, then compare.

4 prompts20 minNew

0 of 4 graded

Prompt 1
Walk a single HTTPS GET request from a laptop on office Wi-Fi to a web server in a cloud region, layer by layer. At each layer say what is added, what addresses are used, and which device reads it on the way.
Say your answer out loud first. Thirty seconds is enough.
Prompt 2
Users report that after the company enabled a site-to-site VPN, small API responses work but large file downloads stall right after the connection opens. Diagnose using encapsulation and MTU, and give two fixes.
Say your answer out loud first. Thirty seconds is enough.
Prompt 3
A trading firm wants its New York and London systems to agree on every order with a synchronous commit, and asks whether upgrading the transatlantic link from 10 to 100 Gbit/s will cut commit latency from 70 ms to under 10 ms. Answer with numbers and offer designs that actually move the number.
Say your answer out loud first. Thirty seconds is enough.
Prompt 4
A primary and standby database share a virtual IP on the same subnet. During a failover test, the standby takes the IP within two seconds, but some application servers keep timing out for about four minutes. Explain at layer 2 what is happening and how to make failover take seconds for everyone.
Say your answer out loud first. Thirty seconds is enough.