Discuss the difficulties of building connectionless service over a virtual circuit subnet, e.g., IP over ATM. 22. How would the time out value of an ARP cache affect its performance? An ARP request is...

Discuss the difficulties of building connectionless service over a virtual circuit subnet, e.g., IP over ATM. 22. How would the time out value of an ARP cache affect its performance?

An ARP request is broadcast in a subnet to obtain the MAC address of a host within the same subnet. Does it make sense to use an ARP request to obtain the MAC address of a remote host outside the subnet?