Please answer the following question

Suppose a router has 6 input and 6 output ports each with identical line speeds. Further suppose that the switching fabric speed is at least 6 times as fast as an input line speed. Then (A) there is no queuing delay in the router (BD queuing can occur in an output port (C) queuing can occur in an input port (D) queuing can occur in the switching fabric (2) Which of the following statements are true for the network layer: (A) RIP uses Link State Algorithm villh fB) OSPF uses Distance Vector Algorithm sfakc ICMP is an inter-AS routing protocol (D) None of the above (3) As part of hierarchical routing, hot-potato routing does the following: -(A) Labels suspicious packets as "hot". Chooses the gateway that has the smallest cost. (D) Provides information to a router about the existence of external networks. (4) In pure ALOHA with 6 active nodes with retransmission probability p, the probability that a given node has a successful transmission for a frame time is (A) (1 -p) TCI-P) (B) (1 -p' (C) (D) p(1 -p