Consider the following two statements:

i. A hash function (these are often used for computing digital signatures) is an injective function.
ii. encryption technique such as DES performs a permutation on the elements of its input alphabet.

Which one of the following options is valid for the above two statements?

Match the following:

List - I

(P) SMTP
(Q) BGP
(R) TCP
(S) PPP

List - II

(1) Application layer
(2) Transport layer
(3) Data link layer
(4) Network layer
(5) Physical layer

Which one of the following uses UDP as the transport protocol?

The address of a class B host is to be split into subnets with a 6-bit subnet number. What is the maximum number of subnets and the maximum number of hosts in each subnet?