1- The statement Time domain representation of a signal can be obtained if the frequency domain representation of the same signal is known. is

a) Always true b) Always false c) Sometimes true

2- What method is required to estimate the received signal strength at any given distance from a transmitter ______________________

3- The unique addressing identifier at layer 5 of TCP/IP protocol suite is

a) MAC address b) IP address c) Socket ID d) Port No e) NIC

4- Consider a file of size 10 MB needs to be sent over network with 10 Mbps bandwidth. The file is sent as a collection of individual fragments, each of size 1 KB. The distance between sender and receiver (end hosts) is 4*10^9 meters. There is one router between the sender and the receiver. The links that connect the end hosts to the router are identical in every aspect. Assume speed of propagation of the signals as 2*10^8 m/s. Ignore any queuing or processing delay at the router.

a.) Find the total delay required to complete the file transfer, if there are no extra wait times involved per packet due to the underlying protocol. [5 points].

b.) Find the total delay required to complete file transfer, if each packet must wait one RTT worth wait time before being transmitted at the sender as part of the ACKs used by the underlying protocol [5 points]