2 Provide short answers (8 points) 1. Why do routers have buffers? (2 points) 2. The computational difficulty of which problem does the secrecy of RSA – and moch of the secure communication over today’s Internet-rely on? (2 points) 3. In CSMA/CA, unlike CSMA/CD, why is there a need for inter -frame spacing (IFS)? Purther, the parameters for inter-frame spacing. SIFS and DIFS, are such that SIFSDIFS. Why? (1+1-2 points) What security properties does a digital signature
OR
OR