Kumaun University, Nainital
B.Sc. III Examination, 2010
Computer Science
Paper - Second
(Computer Networks)
Section - A
i. Which processes does TCP, but not UDP, use?
a) Windowing
b) Acknowledgements
c) Source Port
d) Destination Port
ii. Internet is :
a) A local computer network
b) A world wide network of computers
c) An interconnected network of computers
d) A world wide interconnected network of computers which use a common protocol to communicate with one another.
iii. Select Internet uses :
a) Packet switching
b) Circuit switching
c) Telephone switching
d) Telex switching
iv. By an interanet we mean:
a) A LAN of an organization
b) A Wide Area Network connecting all branches of an organization
c) A corporate computer network
d) A network connecting all computers of an organization and using the internet protocol
v. Which of the following protocols is used in the internet :
a) X.25
b) IBM
c) TCP/IP
d) UUCP
vi. Need to retrieve a file from the file server for your word processing application, which layer of the OSI model is responsible for this function ?
a) Presentation layer
b) Session layer
c) Transport layer
d) Datalink layer
vii. IP addresses are converted to :
a) A binary string
b) Alphanumeric string
c) A hierarchy of domain names
d) A hexadecimal string
Section - B
1. What are the important topologies for networks?
2. Explain various layers and their functions in OSI/ISO reference model.
3. What is a computer network? explain its uses.
4. Write a note on IEEE 802.3 standard.
Section – C
1. Write short notes on TCP/IP, X.25 Protocol.
2. Explain different types of errors and any two schemes used for error detection and correction. Also explain how error rate is measured.
3. What is IP address? Explain.
4. Explain the concept of switching in Data Transmission.
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