Consider transmitting a packet from host A to host B via a router, as shown below:
Suppose that before sending the packet, all the ARP tables (in the two hosts and in the router) are empty. Let x denote the time to transmit a packet. Let y denote the delay from beginning the transmission of an ARP query until receiving and processing an ARP response. Ignore propagation delays. Assuming host A knows the IP address of host B, what is the total delay in moving the packet from Host A to Host B?