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15. Telnet, FTP, SMTP, DNS, HTTP are examples of protocols that
are used in____________________.
a.application layer of OSI reference modelb.presentation layer
of OSI reference modelc.session layer of OSI reference modeld.data
link layer of OSI reference model
17. ____________________ is a technique which transforms an
analogue telephone circuit into a digitalsignal, and involves three
consecutive processes: sampling, quantization and encoding.
a. Frequency Modulation (FM)b. Pulse Code Modulation (PCM)c.
Amplitude Modulation (AM)d. Phase Modulation (PM)
5. For large networks, _______ topology is used.a. Bus b. Star
c. Ring d.Mesh
Answer : b
6. ISO stands fora. International Standard Organization b.
International Student Organizationc. Integrated Services
Organization d. Internal student organization
Answer : a
7. ISO OSI model is used ina. Stand alone PC b. Network
environment
Answer : b
8. Network cable lies on _____ layera. Application b. Network c.
Physical d. Transport
Answer : c
11. What is the central device in star topology?a. STP server b.
Hub/switch c. PDC d. Router
Answer : b
13. In OSI network architecture, the routing is performed bya.
network layer b. data link layer c. transport layer d. session
layer
Answer : a
14. Which of the following performs modulation and
demodulation?
a. fiber optics b. satellite c. coaxial cable d. modemAnswer :
d
15. The process of converting analog signals into digital
signals so they can be processed by a receivingcomputer is referred
to asa. modulation b. demodulation c. synchronizing d.
digitising
Answer : d
15. Layer one of the OSI model isa. physical layer b. link layer
c. transport layer d. Application layer
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Answer : a
16. Which of the following communication modes support two-way
traffic but in only one direction at atime?a. simplex b. half
duplex c. three-quarters duplex d. all of the above
Answer : b
17. Which of the following is not a transmission medium?a.
telephone lines b. coaxial cables c. modem d. microwave systems
Answer : c
18. Which of the following is required to communicate between
two computers?a. communications software b. protocol c.
communication hardware d. all of above
Answer : d
19.In a synchronous modem, the digital-to-analog converter
transmits signal to the -------a. equalizer b. modulator c.
demodulator d. terminal
Answer : a
21. Number of bits per symbol used in Baudot code is
a. 7 b. 5 c. 8 d. 9Answer :b
26.What is the purpose of ARP?a. IP to host name resolution b.
Host name to IP address resolutionc. Mac to IP address resolution
d. IP to Mac address resolution
Answer : d
27. You are working with graphic translations. Which layer of
the OSI model is responsible for codeformatting and conversion and
graphic standards.a. Network layer b. Session layer c. Transport
layer d. Presentation layer
Answer : d
28. Which of the following is considered a broad band
communication channel?a. coaxial cable b. fiber optics cable c.
microwave circuits d. all of above
Answer
