Day 3 drills

Written on paper first. Round trip = 250 ms unless the question says otherwise.

D1 (TLS 1.3, cold):

D2 (TLS 1.2 / HTTP/3):

D3 (a) no keep-alive: D3 (b) keep-alive: D3 (c) HTTP/2: D3 (d) HTTP/2 from a CDN:

D4 (IRCTC DNS move, and why AWS uses 60 s):

D5 (tatkal handshakes, cores):