A. In a circuit switched network with 10 hosts, if each pair of hosts can establish at most one circuit between them, what is the maximum number of simultaneous circuits?

B. Suppose you have a packet switched network that has ten hosts. You want these switches to be able to deliver packets to all ten hosts no matter what (working) topology they are put in: trees, lines, etc. How many entries must each switch's forwarding table have for packets to be able to reach every end host?