CE-5 | August 2015
1. (a) False.
(b) True.
(c) False. Switch does not change MAC address.
(d) False.
(e) True.
2. (a) B1,B2,B3
(b) X,S,Z,W
(c) B2
(d) -
(e) B1, B2
(f) S
(g) B1,B2,B3
(h) W
3. (a) 16KB
(b) (i) 1KB (ii) 64KB
(c) (i) 64KB (ii) 68KB
4. (Part A) a.root-servers.net -> H.COM-SERVERS.NET -> a.ns.facebook.com (Part B) (1) a.root-servers.net (2) H.COM-SERVERS.NET (3) A.GTLD-SEVERS.NET (4) ns.berkeley.edu (5) Nothing
(c) (1,2) T and (1,3) T and (2,3) T
5. (a) (i) E(M, Jill-Pub) (ii) Yes, E(M, Jill-Pub) is the best Jack can do without exposing M.
(b) M || E(H(M), Jack-Private)
(c) No, not a strong hash function.
