CSCE 463 Midterm 2 Exam Questions
and Answers Graded A+
What does CDN stand for: - Correct answer-Content Distribution Networks
CDNs are/do: - Correct answer-- Push replicated content (files, videos, images)
towards edges.
- Distributed system of application-layer servers
How do CDNs direct users to the closest replica/edge server? - Correct answer-
Akamai (a major CDN) relies on DNS to bounce the user to the best server. This is
based on the location of the local resolver to find the best server (e.g., using
distance, load, latency, and available bandwidth)
What are some downsides of CDNs? - Correct answer-- The distance from a user
to their local resolver is gernally unkown. This may lead to inaccuracies for large
ISPs.
- Another drawback is long resolution chains. 15 CNAMEs back-to-back is not just
huge latency, but also prone to incorrect configuration, dead-ends, loops.
What is IP spoofing? - Correct answer-Sending packets with fake source IP.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
and Answers Graded A+
What does CDN stand for: - Correct answer-Content Distribution Networks
CDNs are/do: - Correct answer-- Push replicated content (files, videos, images)
towards edges.
- Distributed system of application-layer servers
How do CDNs direct users to the closest replica/edge server? - Correct answer-
Akamai (a major CDN) relies on DNS to bounce the user to the best server. This is
based on the location of the local resolver to find the best server (e.g., using
distance, load, latency, and available bandwidth)
What are some downsides of CDNs? - Correct answer-- The distance from a user
to their local resolver is gernally unkown. This may lead to inaccuracies for large
ISPs.
- Another drawback is long resolution chains. 15 CNAMEs back-to-back is not just
huge latency, but also prone to incorrect configuration, dead-ends, loops.
What is IP spoofing? - Correct answer-Sending packets with fake source IP.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
