Networking.

Network protocols, DNS, and transport. Covers 8 sub-skills.

• Networking · 1 of 3

  TCP/UDP & Transport Layer

  What is the size of a UDP header?

  A4 bytesB8 bytesC20 bytesD16 bytes

• Networking · 2 of 3

  HTTP/1.1, HTTP/2, HTTP/3

  What compression does HTTP/2 use for headers?

  AQPACKBHPACKCBrotliDgzip

• Networking · 3 of 3

  CDN & Edge Networking

  What is the largest risk of an overly broad CDN cache key for authenticated pages?

  ALarger surrogate-key tag tables in the CDN's purge indexBIncreased p99 latency from extra edge revalidation round tripsCHigher origin egress from coalesced cache fills at the shieldDCross-user data leakage from improperly reused cache