Enrollment No. ...........
END TERM EXAMINATION
FOURTH SEMESTER (BCA) MAY-JUNE 2016
Paper Code: BCA-210
Subject: Computer Networks
Time: 3 Hours
Maximum Marks: 75
Note: Attempt any five questions including Q no.1 which is compulsory. Select one question from each unit.
- Q1. (a) What are the two types of line configuration? 2.5
- (b) List four design issues in DLL of OSI model. 2.5
- (c) Name two bandwidth-delay products. 2.5
- (d) Name two types of connectors for fiber-optic cables. 2.5
- (e) A multiplexer combines four 100kbps channels cables. Using a time slot of 2 bits. What is the frame rate and frame duration? 2.5
- (f) What is dynamic routing? 2.5
- (g) What is SYN flooding attack? 2.5
- (h) Define Piggybacking and its benefit. 2.5
- (i) What does the Shannon capacity have to do with data communication? 2.5
- (j) What is the use of sockets in process-to-process communication? 2.5
UNIT-I
- Q2. (a) Explain multimode and single mode for propagating light along optical channels. 5
- (b) Discuss various design issues for presentation and application layer of OSI model. 7.5
- Q3. (a) What is the role of DTE-DCE interface in internetworking? Explain with some examples. 7.5
- (b) Describe the three types of transmission impairment mechanisms. 5
UNIT-II
- Q4. (a) Discuss LRC, VRC and CRC error detection mechanisms. 7.5
- (b) What is Normal response mode and asynchronous balanced mode in data link control protocols. 5
- Q5. (a) What is Synchronous Time-division multiplexing? Explain the process of Interleaving in TDM. 7.5
- (b) What is Broadband ISDN? How BRI and PRI works? 5
UNIT-III
- Q6. (a) What is a Router? How router boots up? Explain the role of IOS in routers. 7.5
- (b) What is flooding in routing? Discuss the working of any dynamic routing algorithm. 5
- Q7. (a) Explain the different types of classes in IPv4 addressing (classfull addressing) 5
- (b) Describe distance vector and link state routing algorithm. 7.5
UNIT-IV
- Q8. (a) What is port addressing? List three ICANN ranges for port addressing. 5
- (b) With respect to TCP, discuss the role of the following: 7.5
- (i) Sequence Number
- (ii) Acknowledgement Number.
- (iii) Window size
- (iv) Urgent points.
- Q9. (a) Compare client-server and peer-to-peer application layer Paradigms 5
- (b) With respect to UDP discuss the role of the following: 7.5
- (i) Pseudo header
- (ii) Destination port Number
- (iii) length field