Jawaharlal Nehru Technological University Anantapur 2011-1st Sem B.Tech Information Technology II ester(R09) Supplementary s, "Data Communication systems" - Question Paper

Code :9A12302 R9
II B.Tech I Semester(R09) Supplementary Examinations, May 2011
DATA COMMUNICATION SYSTEMS
(Information Technology)
Time: three hours Max Marks: 70
ans any 5 ques.
All ques. carry equal marks

1. (a) Briefl y define broadcast and point to point computer network.
(b) List and briefl y define the fi ve basic data communications network topologies.
(c) describe the subsequent terms: info capacity, bits, bit rate, band and M-ary encoding.

2. (a) discuss how waves are propagated down a metallic transmission line.
(b) Briefly define the construction of an optical fi lter cable.

3. (a) describe companding and discuss analog and digital companding.
(b) define wavelength-division multiplexing.

4. discuss about the satellite communication in microwave system.

5. (a) explain about the call progress tones and signals.
(b) discuss the units of power measurements.

6. (a) Contrast the similarities and diff erences ranging from two-way mobile radio and cellular telephone.
(b) List and define the 3 classifi cations of AMPS cellular telephone.

7. Clearly discuss about fault detection methods.

8. elaborate the 2 classifications for voice-band modem? Briefly discuss every one.

Earning:   Approval pending.