GTU BE 2019 Summer Question Papers || Gujarat Technological University
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Subject Code: 2171008
GUJARAT TECHNOLOGICAL UNIVERSITY
Subject Name: Data Communication and Networking
Time: 02:30 PM TO 05:00 PM
Total Marks: 70
Date: 18/05/2019
FirstRanker.com
Subject Code: 2171008
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VII(NEW) EXAMINATION — SUMMER 2019Subject Name: Data Communication and Networking
Time: 02:30 PM TO 05:00 PM
Total Marks: 70
Date: 18/05/2019
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Instructions:- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | (a) Briefly explain uses of computer networks. | 03 |
| (b) What is data communication? List and explain fundamental characteristics of data communication system. | 04 | |
| (c) Explain OSI reference model in detail. | 07 | |
| Q.2 | (a) Briefly explain co-axial cable with diagram. | 03 |
| (b) What is framing. List and explain types of framing. | 04 | |
| (c) Write short note on digital subscriber line. | 07 | |
| OR | ||
| (a) Explain Go-Back-N ARQ using neat and clean flow diagrams. | 07 | |
| Q.3 | (a) Explain fundamental difference between CSMA/CA and CSMA/CD. | 03 |
| (b) Comparatively explain vulnerable time and throughputs of pure and slotted ALOHA. | 04 | |
| (c) Write short note on standard Ethernet. | 07 | |
| OR | ||
| (a) What is Gateway? | 03 | |
| Q.4 | (b) Explain addressing mechanism in IEEE 802.11 standard for wireless LAN. | 04 |
| (c) Explain Bluetooth layers in detail. | 07 | |
| (a) Write full forms: ARP, RARP; DHCP, DNS, ISDN and ATM. | 03 | |
| Q.5 | (b) Define: Repeater, Hub, Bridges and Router. | 04 |
| (c) Explain UDP operation:. Also enlist the uses of UDP. | 07 | |
| OR | ||
| (a) Explain TCP connection establishment process with neat figure. | 03 | |
| (b) Briefly explain virtual LAN. | 04 | |
| (c) Explain ICMP error reporting in detail. | 07 | |
| Q.5 | (a) Explain duties performed by network layer. | 03 |
| (b) Explain process of public key distribution. | 04 | |
| (c) Write short note on Voice Over IP. | 07 | |
| OR | ||
| (a) Enlist and explain services provided by network security. | 03 | |
| (b) Comparatively explain symmetric and asymmetric key cryptography. | 04 | |
| (c) Explain in detail: Digital signature. | 07 |
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