IV/BCA/403 Student's Copy
2 0 1 8
CBCS
4th Semester
BACHELOR OF COMPUTER APPLICATIONS
Computer Networking
Paper No. BCA 403
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 15
1. Tick the correct answer in the brackets provided 1×10=10
This network lets users send and receive data as if their devices were
connected to the private network.
Enterprise Private Network
System Area Network
Virtual Private Network
Storage Area Network
It measures the relative strengths of two signals or one signal at two
different points.
Attenuation
Distortion
Noise
All of the above
A static route which is set up and pre-established prior to initializing
connections to the host, is
Packet Switching
Circuit Switching
Multiplexing
Datagram Network
/546 1 Contd.
The process that converts signals, such as a sound picked up by a
microphone into a digital signal is
digital-to-analog converter
wave division multiplexing
frequency division multiplexing
analog-to-digital converter
This sender sends a number of frames specified by a window size even
without the need to wait for individual ACK from the receiver.
Stop-And-Wait ARQ
Go-Back-N ARQ
Selective Repeat ARQ
All of the above
Media Access Control sub-layer is found in
session layer
datalink layer
application layer
network layer
An unreliable and connectionless protocol that requires little overhead
and offers fast delivery is
TCP
PPP
UDP
POP
This protocol does not advertise routes. It advertises links.
Distance Vector Routing
RIP
ERP
Link State Routing
IEEE standard for Bluetooth and Wi-Fi coexistence mechanism is
IEEE 802·15·2
IEEE 802·7
IEEE 802
IEEE 830
IV/BCA/403/546 2 Contd.
Bluetooth frequencies lie within what is referred to as the radio
frequency region, specifically in the range of
3·12-5 GHz
2·40-2·48 GHz
7·5-8 GHz
2·50-3 GHz
2. Tick whether the following statements are True or False 1×5=5
A repeater operates at the physical layer.
T F
A multiplexer is a device that takes a single input line and routes it to
one of several digital output lines.
T F
A bit added to a string of binary code to ensure that the total number
of 1-bit in the string is even or odd is called check bit.
T F
ICMP (Internet Control Message Protocol) is an error-reporting protocol
network device.
T F
A standard network protocol used for the transfer of computer files
between a client and server on a computer network is called TELNET.
T F
SECTION—B
Marks 10
Answer the following questions 2×5=10
1. State the difference between Analog and Digital Signals.
2. What is Multiplexing?
3. What do you understand by checksum?
4. What do you mean by 'Flooding' in network routing algorithm?
5. Explain different protocols involved in e-mail.
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
1. Explain the different models of OSI layer. 6
Explain the different network connecting devices. 4
IV/BCA/403/546 3 Contd.
OR
Describe the different layers involved in TCP/IP protocol suit. 6
What is Network Address? What are the different types of Network
Addresses? 4
2. Explain the differences among ASK, FSK and PSK shift keys. 6
What is time division multiplexing? 4
OR
Explain circuit switching. State the advantages and disadvantages. 5
Explain datagram network. 5
3. Explain the selective repeat ARQ protocol in detail. 5
Explain how Humming distance is used in error detecting and
correcting codes. 5
OR
Using CRC error checking, perform the operation where the divisor is
1011 and the dividend is 1001. Check whether there is any error in the
code or not. 5
Explain Stop-And-Wait ARQ. Under which condition Go-Back-N is
inferior to Stop-And-Wait protocol? 5
4. What is IP address? Explain the different classes of IP address. 5
Explain the workings of Link State Routing with suitable diagram. 5
OR
Distinguish between IPv4 and IPv6. 4
Explain the connection establishment and termination process in TCP. 6
5. Explain the different features of TCP/IP application layer. 4
Explain the following 2×3=6
DNS
FTP
WLAN
OR
What is Ethernet? Compare and write the differences between
100 Base-T and Gigabit Ethernet. 5
Write down the architecture layer of Bluetooth. 5