BHARAT SEVAK SAMAJ
Time: 2 hrs. Max. Marks: 100
I. Fill in the blanks: (10 x 1 = 10)
1. OSI stands for -----------.
2. In satellite communication the ground station is known as ---------.
3. TCP segment consists of -------- byte header.
4. MODEM stands for -----------.
5. --------- is an example of bounded medium.
6. Coaxial cables have conductors with ---------.
7. ------------ is a device that can convert digital signals to analog signals.
8. Binary codes are sometimes transformed in modems into ----------.
9. To connect a computer with a device in the same room, you need a ---------.
10. The ---------- layer accepts data from the session layer.
II. State whether True or False: (10 x 1 = 10)
1. Encryption is done in the presentation layer.
2. Dialog control is a function of the session layer.
3. Mail services are available to network users through the application layer.
4. Directory services are available to network users by the session layer.
5. Node to node delivery of data is done by the data link layer.
6. The transport layer lies between the network layer and the session layer.
7. Layer 2 lies between the physical layer and the network layer.
8. In the session layer translations form one character code to another occur.
9. The term sampling means measuring the amplitude ate equal intervals.
10. Working of WAN involves satellite.
III.Answer any SIX of the following: (6 x 10 = 60)
1. Draw TCP segment format.
2. What is DNS?
3. What is email? What are its features?
4. Explain FTP.
5. Construct hamming code for the bit sequence 10011101.
6. Describe briefly the physical layer.
7. Describe LAN, WAN, MAN.
IV. Answer any ONE of the following: (1 x 20 = 20)
1. Explain OSI reference model.
2. Compare and contrast TCP/IP and OSI.