QUESTION BANK UNIT 1: NETWORKS MODELS PART A

bunchlearnedNetworking and Communications

Oct 30, 2013 (4 years and 9 days ago)

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QUESTION BANK









UNIT 1: NETWORKS MODELS



PART A


1.

Discuss the use of computer networks.

2.

Define Data communication

3.

What are the five important components of data communications?

4.

What are the various forms of data?

5.

What are the various types o
f data flow?

6.

List two advantages of layering principle in computer networks.

7.

With the example define half duplex communication.

8.

Name four topologies of computer networks.

9.

Suggest two points to improve the performance of network.

10.

Define Distributed Systems
and Distributed Processing

11.

Define Transit time and Response time

12.

Define Topology.

13.

Define standards and why are standards needed?

14.

What are the network support layers and the user support layers?

15.

What are the responsibilities of network layer?

16.

Define IP addr
ess.

17.

What is function of transport layer?

18.

What is meant by narrow band ISDN?

19.

Describe the features of LAN.

20.

What is meant by piggybacking? What are its advantages and disadvantages?

21.

List the features of internetworking

22.

List the layers of OSI model?

23.


List t
he
different network topologies.

24.


Explain t
he function of data link layer.

25.

Which layer o
f OSI provides synchronization?

26.

Which layer of
OSI provides routing functions?

27.

Give any two physical layer interface standards?

28.

What type of switching used in ISDN and
ATM?

29.

What are the properties of LAN protocol?

30.

Define jitter.

31.

What is the difference between circuit switching and packet switching.

32.

What is the difference between connection oriented and connectionless.


PART B

1.

Discuss the different type of ne
twork archit
ecture in detail

2.

a)W
rite a brief notes on ARPANET

b) Discuss in detail about the various features of the phys
ical layer.


3.

E
xplain OSI model in detail.


4.

Explain circuit switching .Give examples of cir
cuit switched data networks.


5.

Ex
plain about the Evolution of data networ
ks and network architecture.


6.

Write short notes on FDDI.



7.

Write short notes on ATM layers

and
Describe the ATM AAL layer protocols.


8.

Explain in detail about SONET/SDH architecture.


9.

Ex
plain ISDN architecture and its services.

10. Explain in detail about the Evolution of data networks.

11.

Explain the TCP/IP protocol suite in detail.

12.

Discuss in detail about the ATM protocol reference model and the different layers of
ATM.

13.

a) Write short note

on SONET/SDH

b) Write short note on FDDI



UNIT 2: DATA LINK CONTROL



PART A



1.

What are the responsibilities of data link layer?

2.

Mention the types of errors.

3.

What is redundancy?

4.

List out the available detection methods.

5.

Write short notes on VRC, LRC, an
d CRC

6.

Write short notes on CRC generator & checker.

7.

Define checksum.

8.

Write short notes on error correction.

9.

Mention the types of error correcting methods.

10.

What is the purpose of hamming code?

11.

Mention the categories of flow control.

12.

What is the function of
stop and wait flow control?

13.

Mention the advantage and disadvantage of stop and wait flow control.

14.

Explain how errors are detected using CRC.

15.

Discuss about any two methods of framing.

16.

Compare virtual circuits and datagrams.

17.

What is the significance of flow
control?

18.

Define ARQ.

19.

Mention the function of go
-
back N
-
ARQ.

20.

What is selective reject ARQ?

21.

Define HDLC. List the types of stations is HDLC.

22.

What are the different communication modes in HDLC?

23.

Mention the types of frames in HDLC.

24.

What is meant by bit stuffin
g?

25.

What is meant by LAN and Mention the various architecture in a LAN?

26.

Define a standard 802.3

27.

Write short notes on FDDI.

28.

What is piggy backing?

29.

List out the different types of IEEE standards.

30.

Compare pure ALOHA and S
-
ALOHA.

31.

Compare stop and wait and slidi
ng window protocols.

32.

What are the characteristics of GIGABIT ETHERNET?

33.

Define baud rate.

34.

Difference between broadcast and multicast.

35.

What is HDLC?





PART B

1.

Discuss a
bout error control in detail

2.

Define different types of Ethernet and Explain the Ethernet
architecture used in LAN.

3.

Discuss the function of token passing protocol.

4.

Explain stop and wait protocol.

5.

Illustrate any two types of framing methods in data link layer.

6.

Describe ALOHA and its types in detail.

7.

Explain about the IEEE 802.3 (ETHERNET) standa
rd for LAN networks.

8.

Discuss about error control in detail.

9.

a)Write short note on Checksum

b) Write short note on Framing

12. Explain the stop and wait protocol in detail.

13.

Describe ALOHA and its types in detail.

14.

Explain the ETHERNET architecture

used in LAN.

15.

a)Write short note on Fast Ethernet


b)Write short note on Gigabit Ethernet.

16
.
Explain IEEE 802.11 standard in detail.

17.

Explain IEEE 802.4 standard.

18.

Explain IEEE 802.5 standard.






UNIT 3: NETWORK ROUTING ALGORITHMS


PART A


1.

Define Ro
uters.

2.

How can the routing be classified?

3.

Write the keys for understanding the distance vector & link state routing.

4.

. How the packet cost referred in distance vector and link state routing?

5.

Define Gateway.

6.

Define Subnetting.

7.

Define Masking.

8.

What is floodi
ng? What are its disadvantages?

9.

What is meant by Routing?

10.

What is congestion?

11.

What is Static and Dynamic Routing?

12.

What is Centralized routing and isolated routing
?

13.

What are the Differen
t Broadcast routing techniques?

14.

Give the advantages of multipath routin
g?

15.

What is reverse path forwarding and state

its advantage?

16.

Why internet protocol is unreliable.

17.

What are the various congestion control techniques?

18.

Write down the f
unction of Gateway and Bridges?

19.

Write down the function of Router and Repeaters.

20.

What is Mu
lticasting and unicasting?

21.

What are various features of IPV6?

22.

Write the difference between IPV4 and IPV6

23.

What is logical address?

24.

Difference between fragmentation and reassembling.

25.

What is mapping?

26.

Define forwarding and delivery.

27.

What is piggybacking and h
ow it is advantageous.

28.

Difference between routers and gateway.

29.

What are the various features of IPv6?

30.

What is network address? Give example.



PART B


1.

What are IP services?Explain about IPV4 header.

2.

Explain mul
ticast routing principles.

3.

Explaion reverse p
ath forwarding.

4.

Explain two routing algorithm used at network layer.

5.

Explain Distance Vector Routing.

6.

Write short notes on ICMP.

7.

What are IP services? Explain about IPV4 header in detail.

8.

a) Explain multicasting routing principles.

b)Explain reverse path f
orwarding.

9.

Explain IPV4 addressing

in detail.

10.
Explain mapping of logical to physical address and physical to logical address in detail.

11.

Write short note on ICMP


Write short note on routers and gateways.


12.Write short note on direct Vs i
ndirect delivery.


Write short note on forwarding.





UNIT 4

CONGESTION AND TRAFFIC MANAGEMENT


1.

What is distributed network?

2.

What is queuing analysis?

3.

What are the types of queuing models?

4.

List out the different types of congestion control tech
niques.

5.

How can you prevent loss of packet in congested networks?

6.

Write anticipated advantages of ATM networks.

7.

How is TCP reliable

8.

What are the effects of congestion?

9.

Define Traffic management.

10.

What are the advantages of TCP over ATM?

11.

What is TCP
?

12.

What a
re the functions of transport layer?

13.

Define single server Queue.

14.

Define multi server queue.

15.

What is congestion?

16.

List out the requirements of ATM traffic.

17.

List out the requirements of congestion control.

18.

Define QOS.

19.

What are the mechanism used in congestion

control?

20.

Draw the diagram for single server queue.

21.

How can you prevent loss of packets in a congested networks.

22.

How is TCP is reliable.

23.

Write anticipated advantage of ATM networks.

24.

What is little’s formula.


PART B


1.

Explain in detail about various que
uing models.

2.

Eexplain about congestion control in packet network.

3.

Explain M/G/1 queueing system and derive P
-
K formula for expected customer waiting
time in queue.

4.

Explain M/M/1 queueing model.

5.

Explain the effects of congestion in detail.

6.

Explain the TCP f
low control and congestion control in detail.











UNIT 5


NETWORK SECURITY



1.

What is network security?

2.

What are the security issues in network?

3.

What is cryptography?

4.

What is abstract syntax notation?

5.

What are the various security requirements?

6.

Draw n
etwork security model.

7.

What are the features of wireless security network?

8.

Define WNS.

9.

What is intrusion?

10.

Define intrusion prevention and detection system.

11.

Define firewall.

12.

Define the term WEB, WPA, TKIP.

13.

List out the different types of defensive strategie
s.

14.

What are the different types of firewall?

15.

What are the algorithms used in network security?

16.

What are legal implications?

PART B

1.

What is firewall? Explain its types.

2.

Discuss about wireless LAN security and its protocols.

3.

What are the various preventive m
easures for network security? Explain.

4.

Explain in detail about intrusion detection and intrusion prevention system.

5.

Write short notes on

a.

WEP

b.

WPA

c.

TKIP

6.

Explain various threats and responses in detail.