Please log in to continue.
1 (a)
What is data communication? What are the four important fundamental characteristics?
6 M
1 (b)
What is protocol? Briefly explain its key elements.
5 M
1 (c)
Explain the responsibilities of transport layer in OSI reference model.
9 M
2 (a)
Define bandwidth. A periodic signal has bandwidth of 20Hz. The highest frequency is 60Hz. What is the lowest frequency? Draw the spectrum if the signal contains all frequencies of the same amplitude.
4 M
2 (b)
Calculate the Shanon channel capacity in the following cases:
(i) Bandwidth=20 kHz SNRdB=40;
(ii) Bandwidth = 200 kHz SNRdB=6
(i) Bandwidth=20 kHz SNRdB=40;
(ii) Bandwidth = 200 kHz SNRdB=6
6 M
2 (c)
Define line coding. Describe unipolar NR2, polar NR2-L, bipolar AMI and Manchester encoding by applying on the information sequence 101011100.
10 M
3 (a)
An analog signal has a bit rate of 8000 bps and a band rate of 1000 band. How many data elements are carried by each signal elements? How many signal elements do we need?
5 M
3 (b)
Explain the phase modulation with a neat diagram.
5 M
3 (c)
What is time division multiplexing? Explain how statical TDM overcomes the disadvantages of synchronous TDM.
10 M
4 (a)
Briefly explain the coaxial cable and optical fiber with their applications.
8 M
4 (b)
Find the codeword, using CRC given data word "1001" and generator "1011".
8 M
4 (c)
What is internet checksum? With an example list the steps undertaken by the sender and receiver for error detection.
6 M
5 (a)
Explain selection repeat ARQ with neat diagrams.
8 M
5 (b)
What is piggybacking? List its usefulness.
4 M
5 (c)
Explain the frame format and transitional phases of point-to-point protocol.
8 M
6 (a)
A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the troughout if the system products 100 frames per second.
6 M
6 (b)
With a neat diagram explain CSMA/CD protocol.
8 M
6 (c)
Explain the MAC sublayer of gigabit Ethernet
6 M
7 (a)
Explain the architecture of IEEE 802.11.
8 M
7 (b)
Differentiate between repeater and amplifire.
2 M
7 (c)
How does a VLAN reducer network traffic?
4 M
7 (d)
Differentiate between bus backbone and star backbone.
6 M
8 (a)
Explain in detail, the architecture of SONET system.
10 M
8 (b)
Give the architecture of ATM. Show how VPs and VCs are established.
6 M
8 (c)
Write a short note on AMPS.
4 M
More question papers from Computer Networks 1