SYMCA (Part (Under Faculty of Engg.) Examination, 2017
COMPUTER NETWORKS
Day and Date Saturday, 13-5-2017 Total Marks 100
Time 3.00 p.m. to 6.00 p.m.
1. MCQ 20
The physical layer concerns with
Bit-by-bit delivery Process to process delivery
Application to application delivery None of the mentioned
Which transmission media has the highest transmission speed in a network
Coaxial cable Twisted pair cable
Optical fiber Electrical cable
Bits can be send over guided and unguided media as analog signal by
Digital modulation Amplitude modulation
Frequency modulation Phase modulation
In asynchronous serial communication the physical layer provides
Start and stop signalling Flow control
Both a and b None of the mentioned
The physical layer is responsible for
Line coding Channel coding
Modulation All of the mentioned
A single channel is shared by multiple signals by
Analog modulation Digital modulation
Multiplexing None of the mentioned
Wireless transmission can be done via
Radio waves Microwaves
Infrared All of the mentioned
Seat
No.
SLR-L 14
The data link layer takes the packets from and encapsulates
them into frames for transmission.
Network layer Physical layer
Transport layer Application layer
Which one of the following task is not done by data link layer
Framing Error control
Flow control Channel coding
10) Header of a frame generally contains
Synchronization bytes Addresses
Frame identifier All of the mentioned
11) Automatic repeat request error management mechanism is provided by
Logical link control sublayer Media access control sublayer
Network interface control sublayer None of the mentioned
12) CRC stands for
Cyclic redundancy check Code repeat check
Code redundancy check Cyclic repeat check
13) Which one of the following is a data link protocol
Ethernet Point to point protocol
HDLC All of the mentioned
14) Which one of the following is the multiple access protocol for channel access
control
CSMA/CD CSMA/CA
Both a and b None of the mentioned
15) The OSI model has layers.
4 5 6 7
16) TCP/IP model does not have layer but OSI model have
this layer.
Session layer Presentation layer
Application layer Both a and b
17) Which layer is responsible for process to process delivery
Network layer Transport layer
Session layer Data link layer
18) Which layer provides the services to user
Application layer Session layer
Presentation layer None of the mentioned
19) Transmission data rate is decided by
Network layer Physical layer
Data link layer Transport layer
20) The network layer concerns with
Bits Frames
Packets None of the mentioned
SECTION I
2. Write short note on (any
Ethernet.
Wireless Transmission.
Cable Television.
Physical and Logical Topology.
Data Link Layer Switching.
3. Answer the following
Explain OSI reference model in detail. 10
Explain guided transmission media in detail. 10
OR
What is switching Explain types of switching. 10
SECTION II
4. Write short note on (any
Proxy firewall.
The TCP Service Model.
Subneting.
Elements Of Transport Protocols.
DNS.
5. Answer the following
Explain Routing Algorithms in detail. 10
Explain UDP and TCP protocols in detail. 10
OR
Explain Network Security in detail. 10