1. (i) [3] Write the three basic elements of a Computer Network. (ii) (2] Write any two protocols which are used in internet. (iii) [2] What is an access network? (iv) [3] Give a name of access technology used for each of the following: home, enterprise and mobile communication. (v) [2] Why is DSL asymmetric access? (vi) [3] Give any three communication links which are mostly used. 2. Assume that a network uses the packet switching technique to send its packets. The transmission rate for each communication link is R bps. The length of each packet is L bits. (i) [2] If there is a single communication link between the sending host A and the receiving host B, what is the transmit time for a packet from A to B? (ii) [2] If there are 2 communication links between A and B, what is the transmit time for a packet from A to B? (iii) (3) If there are N communication links between A and B, what is the transmit time for a packet from A to B? (iv) (5) If there are N communication links between A and B, what is the transmit time for P packets from A to B