nielit.gov.in : C Level Course Advanced Computer Networks Paper 2017

Name of the Organisation : National Institute of Electronics & Information Technology
Examination : C Level Course
Document Type : Sample Question Paper
Year : 2017
Name of the Subject : Advanced Computer Networks

Website : http://beta.nielit.gov.in/content/january-2017
Download Sample Question Paper : https://www.pdfquestion.in/uploads/13086-Networks.pdf

C Level Course Advanced Computer Networks Paper :

Time: 3 Hours
Total Marks: 100
Note :
1. Answer question 1 and any FOUR from questions 2 to 7.
2. Parts of the same question should be answered together and in the same sequence.

Related : NIELIT C Level Course Mathematical Methods For Computing Paper 2017 : www.pdfquestion.in/13083.html

1. a) Justify: VoIP uses UDP protocol to transfer voice over internet, although UDP provides connectionless service.
b) Differentiate between ALOHA and CSMA technique with respect to medium access.
c) Define Terms Virtual Path and Virtual Channel.
d) What are the limitations of current IP network?
e) TCP is connection oriented protocol. How does it establish connection during startup?

f) M/G/1 queue is a queue model where packet arrivals follow Markovian theory, service times have a General distribution and there is a single server. Explain probability generating function of the stationary queue length in M/G/1.

g) What are the differentiated services offered by IPv4 protocol header? (7×4)

2. a) In telecommunications and computer networks, what is a method by which multiple analog or digital signals are combined into one signal over a shared medium? By taking suitable diagram, explain types of multiplexing.

b) Congestion avoidance is a preventive method of congestion control of network. Explain Jacobson’s and Karn’s algorithm of congestion avoidance. (8+10)

3. a) In queuing theory what is importance of Jackson Theorem?
b) Transport layer provides connection oriented or connection less services to the applications. Differentiate connection oriented and connection less services.

c) ALOHA is a system for coordinating and arbitrating access to a shared communication channel. How does Slotted ALOHA improve the efficiency of pure ALOHA? (6+6+6)

4. a) Asynchronous Transfer Mode (ATM) is “a telecommunications concept defined by ANSI and ITU (formerly CCITT) standards for carriage of a complete range of user traffic, including voice, data, and video signals”. Write down the various services offered by ATM?

b) IPv6 is advanced version of IPv4 which is developed to overcome limitations of IPv4 and also provide feature to support future networking. What are the features supported by IPv6 protocol?

c) Congestion happens whenever the input rate is more than the available link capacity. How ATM does manage traffic Congestion Control? (6+6+6)

5. a) Weighted fair queuing (WFQ) is a data packet scheduling algorithm used by network schedulers. How does it work?
b) Write short note on Multicast routing protocol. (6+12)

6. a) Multi-Protocol Label Switching (MPLS) is a standard technology that offers new capabilities for large scale IP networks. How does it function to offer new capabilities of large scale IP network?
b) Draw and explain functionality of each layer of ATM protocol stack. (8+10)

7. a) The User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite. What are the attributes of UDP?
b) What is VPN? Why is it important for the organization which has multiple branches in different states?

c) The Spanning Tree Protocol (STP) is a network protocol that builds a logical loop-free topology for Ethernet networks. How does Rapid STP provide significantly faster spanning tree convergence compared to normal STP? (6+6+6)

CE1.5-R4: Mobile Computing :
1. a) Describe the various limitations of GPRS.
b) What is WAP push? How is push different from pull?
c) What are the different kinds of mobility generally defined in network system?
d) Differentiate Hard handoff Vs Soft handoff.
e) Differentiate Ad hoc Vs Infrastructure mode wireless Networks.
f) Describe J2ME features
g) Compare Infrared and Radio wave communication. (7×4)

2. a) What is the difference between GSM and GPRS? Explain the network elements in GPRS that are different or enhanced from GSM?
b) Describe the Symbian OS architecture. What are the functions of different layers in this architecture?
c) Draw and describe the WAP Protocol Stack. (6+6+6)

3. a) What are the security algorithms used in GSM for authentication and data encryption?
b) Which are the different components of information security? Explain any four components.
c) Write short note on Broadcast Disks. (6+6+6)

4. a) What is a hashing algorithm? Discuss any two types.
b) Which are the basic requirements of Mobile Databases?
c) Write a short note on Mobile IP. (6+6+6)

5. a) Explain different types of attacks on static assets.
b) List out the advantages and disadvantages of Hoarding of Data at mobile devices.
c) Compare Indirect TCP, Snooping TCP and Transaction oriented TCP. (6+6+6)

6. a) Explain stream ciphering and block ciphering algorithms.
b) Compare Zigbee and Bluetooth.
c) Explain cache invalidation mechanism with advantages and disadvantages. (6+6+6)

7. a) Draw Blue Tooth Protocol Stack & explain four basic layers according to their functions.
b) Explain AODV (Adhoc On-demand Distance Vector) Routing Algorithm with its advantages and disadvantages. (9+9)