(a) Explain briefly the FOUR(4) components of a router. (b) Describe and differentiate the TWO(2) functions of a router, namely routing and forwarding? (c) At the output port of a router, congestion may occur. Explain the situations when this will be the case. (d) An IP datagram of size 10,000 bytes arrives at a router. The router has to forward this packet on a link whose MTU (maximum transmission unit) is 1,000 bytes. Assume that the size of the IP header is 200 bytes. Calculate the number of fragments that the IP datagram will be divided into for transmission. *

15 points