(a) (b) (a) (b) (c) (a) (b) (c) (a) (b) (c) Calculate the total time required to transfer a 2000 KB (Kilo Bytes) file in the following cases. Assume that Round Trip Time (RTT) is 200 milli seconds, packet size is 2 KB (Kilo Bytes), and an initial handshake time of 2 x RTT before data is sent. The data rate of the link is 2 Mbps (Megabits per second) and data packets can be sent continuously (one after another). The data rate of the link is 2 Mbps (Megabits per second) and after each data packet, we must wait for RTT before sending the next packet. Suppose that we want to set up a point-to-point communication link between earth and another planet. The data rate of the Imk is 200 Mbps (Megabits per second). The distance between earth and the planet is 600,000 Kilo meters. The data propagates (travels) over the link at the speed of light 3 x 10 meters per second. Calculate the minimum RTT for the link. Using the value of RTT, calculate the delay x data rate product for the link. A camera on the distant planet takes a picture and its size is 50 Mega Bytes). How long will it take to transfer this file from the distant planet to earth? For the following scenarios, calculate the latency (delay) from the first bit of data sent by the sender to the last bit of data received by the destination. Each link has a data rate of 20 Mbps (Megabits per second). The packet size is 5000 bits. Assume that each link introduces a propagation delay of 20 Microseconds. Also assume that a node can begin transmitting data on the outgoing link as soon as it has received the complete packet from the incoming link. A network of two links with a single store-and-forward switch (node) in the path. Same as (a) but in a network of four links connected by three switches (nodes). Same as (a) but assume that the switch (node) can begin transmitting data on the outgoing link after the first 400 bits of the packet have been received. Calculate the delay x data rate product for the following links. Use only one-way measured the first bit sent by the send to the first bit received by the destination. A link with a data rate of 100 Mbps (Megabits per second) with a one-way delay of 10 microseconds. A link with a data rate of 1.5 Mbps (Megabits per second) and one-way delay of 50 microseconds. A satellite link with a data rate of 1.5 Megabits per second and 40,000 Kilo meters above the earth. The only delay is the propagation delay and signals travels with the speed of light (3 x 10 meters per second)