Essay Asynchronous Transfer Mode (ATM) Network – Ethernet LAN – Communication Channel – Networking Assignment Help

Assignment Task:

1. When you have two different networks, one is ATM (Asynchronous Transfer Mode) Network and the other is legacy Ethernet LAN inter-connected by a layer 3 device, With the help of a detailed diagram describe the process of PDU (Protocol Data Units) creation at each layer and how they communicate between the server in ATM network and client PC in Ethernet LAN. With the detailed diagram, you also need to explain each layer of TCP/IP model interact and any sub-layers interact for communication to be successful. 

2. Compute the amplitude, frequency, time period and phase for each of the following equationsA/5*????????????????????????(1000????????+120) 

3. From the following figures, compute the maximum amplitude, frequency, time period and phase for each of the wave. The x-axis represents the time in sec and y-axis represents the amplitude. 

4. You are communicating between two satellites. The transmission obeys the free space law. The signal is too weak. Your vendor offers you two options. The vendor can use a higher frequency that is triple the current frequency or can triple the effective area of both of the antennas. Which will offer you more received power or will both offer the same improvement, all other factors remaining equal? How much improvement in the received power do you obtain from the best option? 
c = speed of light = 3 x 108 m/sec
d = propagation distance between antennas
Pr = signal power at the receiving antenna
Pt = signal power at the transmitting antenna Ar = effective area of the receiving antenna At= effective area of the transmitting antenna 

5. A Communication channel has a loss of 20 dB. The input transmission end the signal power is measured as 0.5 W, and the output noise level is measured as 4.5 μW. Using this information, calculate the output signal-to-noise ratio in dB at the receiving end.

6. What is the maximum distance (i.e. distance to radio horizon) for a terrestrial microwave wireless link where the sending antenna is on a hilltop 550 meters above sea level and the receiver is a mobile car radio with antenna 10 meters above sea level? 

7. If the maximum distance for LOS communication between the transmitter and the receiver is 20 Km, then calculate the heights of transmitting and receiving antennas such that the height of receiving antenna is double of the transmitting antenna. 

8. In packet switching, do you think line efficiency is greater if packets sizes are smaller, so that a single node-to-node link can be dynamically shared by many packets over time?
Use the scenarios in figure 1 to give a concise analysis. Assume that the standard packet size is 50 octets (un-fragmented packet) and the header size is 4 octets. Show your calculations.