MCQ for COMPUTER NETWORK
1- The ______ is the physical path over which a message travels.
a) Protocol
b) Path
c) Medium
d) Route
2- Three or more devices share a link in ________ connection.
a) Multipoint
b) Point to point
c) Unipoint
d) None of the mentioned
3- Communication channel is shared by all the machines on the network in
a) unicast network
b) broadcast network
c) multicast network
d) none of the above
4- In computer network nodes are
a) the computer that routes the data
b) the computer that terminates the data
c) the computer that originates the data
d) all of the above
5- Bluetooth is an example of
a) local area network
b) virtual private network
c) personal area network
d) none of the above
6- The physical layer concerns with
a) process to process delivery
b) application to application delivery
c) bit-by-bit delivery
d) none of the above
7- In asynchronous serial communication the physical layer provides
a) flow control
b) start and stop signalling
c) both a and b
d) none of the above
8- The data link layer takes the packets from_______ and encapsulates them into frames for
transmission.
a) Physical layer
b) transport layer
c) network layer
d) application layer
9- Which one of the following is a data link protocol?
a) Point to point protocol
b) hdlc
c) ethernet
d) all of the above
10- Transport layer protocols deals with
a) process to process communication
b) application to application communication
c) node to node communication
d) none of the above
11- Physical or logical arrangement of network is______.
a) Networking
b) Topology
c) Routing
d) None of the above
12- This topology requires multipoint connection
a) Mesh
b) Star
c) Ring
d) Bus
13- Multiplexing is used in_____.
a) Circuit switching
b) Data switching
c) Packet switching
d) Packet and Circuit switching
14- Multiplexing can provide
a) Anti jamming
b) Efficiency
c) Privacy
d) Both B and C
15- The combination of two or more networks are called
a)Internetwork
b)WAN
c)MAN
d)LAN
16-The multipoint topology is
a)Bus
b)Star
c)Mesh
d)Ring
17-A communication path way that transfers data from one point to another is called
a)Link
b)Node
c)Medium
d)Topology
18-Period is the inverse of
a)Frequency
b)Phase
c)Amplitude
d)Signals
19-The black and white TV is an example of
a)non periodic composite signal
b)periodic composite signal
c)periodic simple signal
d)None of the above
20-The Nyquist formula gives us any signal level while Shannon capacity gives us the
a)Lower Limit
b)Upper Limit
c)Specific signal level
d)Both B&C
21-The field of the MAC frame that alerts the receiver and enables it to synchronize is known
as
a)SFD
b)preamble
c)source address
d)destination address
22-The maximum length of 1000BaseSX is
a)550 m
b)25 m
c)100 m
d)5000 m
23-1000Base-LX has used two wires for long wave are
a)STP Cable
b)UTP Cable
c)Fiber Optic
d)Coaxial Cable
24-Protocol Data Unit (PDU) is similar to
a)LLC
b)HDLC
c)MAC
d)DSAP
25-The terms that control the flow and errors in full duplex switched Ethernet is called
a)LLC Sub layer
b)MAC Sub layer
c)LLC Control Layer
d)MAC Control Layer
26-The header of the datagram in the IPv4 has
a)0 to 20 bytes
b)20 to 40 bytes
c)20 to 60 bytes
d)20 to 80 bytes
27-In the IPv4 layer, the datagram is of
a)Fixed length
b)Variable length
c)Global length
d)0 length
28-In IPv4, the service type of the service in the header field, the first 3 bits are called
a)Type of service
b)Code bits
c)Sync bits
d)Precedence bits
29-The size and format of physical addresses vary depending on the
a)Receiver
b)Message
c)Sender
d)Network
30-ICMP Stands for
a)Internet Connect Message Protocol
b)Internet Control Message Protocol
c)International Connect Message Protocol
d)International Control Message Protocol
31- Transmission Control Protocol/Internet Networking Protocol have
a)Four Layers
b)Five Layers
c)Six Layers
d)Seven Layers
32- The parameter that is normally achieved through a trailer added to the end of the frame is
a)Access Control
b)Flow Control
c)Error Control
d)Physical addressing.
33- The packets of data that is transported by IP is called
a)datagrams
b)Frames
c)Segments
d)Encapsulate message
34- The control frame that is sent by the destination station is called
a)clear to send
b)Request to sent
c)Distributed Interframe Space
d)Short Interframe Space
35- The field retry means retransmitting frame when its value is set to
a)0
b)1
c)-1
d)infinity
36- IEEE 802.11 have three categories of
a)frames
b)fields
c)signals
d)sequences
37- The access method of baseband layer is
a)FDMA
b)TDMA
c)FSK
d)CDMA
38- A BSS without an AP is called an
a)adhoc network
b)infrastructure network
c)connectionless network
d)channelization network
39- In Carrier Sense Multiple Access (CSMA), if the station senses the medium before trying
to use it then the chance of collision can be
a)Increased
b)Reduced
c)Highlighted
d)Both B & C
40- Code Division Multiple Access (CDMA) differs from Time Division Multiple Access
(TDMA) because there is no
a)bandwidth
b)link
c)carrier
d)timesharing
41- In Carrier Sense Multiple Access (CSMA), the possibility of collision still exist because of
a)Propagation delay
b)sender-receiver delay
c)Sense delay
d)Transmit delay
42- The protocol that is used to transmit data without any schedule time is
a)random access
b)controlled access
c)channelization
d)none of the above
43- Carrier Sense Multiple Access (CSMA) is based on the medium called
a)Listen before talk
b)Listen before sending
c)Sense before transmit
d)Sense before Collision
44- Transmission media are directly controlled by the
a)physical layer
b)data link layer
c)network layer
d)session layer
45- The electromagnetic waves ranging in frequencies between 3 kHz and 1 GHz are called
a)High frequency
b)Infrared
c)Microwaves
d)radio waves
46- RG-59 is used in
a)radio
b)thick Ethernet
c)thin Ethernet
d)cable TV
47- The last step in Pulse Code Modulation (PCM) is
a)Quantization
b)Sampling
c)Encoding
d)Modulation
48- Second generation of the cellular phone network was developed, to provide higher-quality
mobile
a)Video Communications
b)Signal Generation
c)Frame Communication
d)Voice Communications
49- In cellular telephony, for forward and reverse communication, the system uses two
separate
a)Digital signals
b)Analog Systems
c)Digital Data
d)Analog Channels
50- A system with 8-bit addresses has address space of
a)32
b)256
c)720
d)65535
51- In classless addressing, there are no classes but the addresses are still granted in
a)Sections
b)Blocks
c)Codes
d)All of the Above
52- In IPv4 Addresses, classful addressing is replaced with
a)Classless Addressing
b)Classful Addressing new version
c)Classful Advertising
d)Classless Advertising
53- The address FE80::12 is a
a)link local address
b)site local address
c)multicast address
d)loop back address
54- Unlike User Datagram Protocol (UDP), the Transmission Control Protocol (TCP) has the
Services which is
a)Connection Oriented
b)Connectionless
c)Connection Available
d)Connection Origin
55- The maximum size of the TCP header is
a)20 bytes
b)40 bytes
c)60 bytes
d)80 bytes
56-Transmission Control Protocol (TCP) has the same Checksum controlling like
a)UDP
b)ICMP
c)STMP
d)IP
57- Piggybacking protocol is a technique used for
a)ACKs
b)NAKs
c)both a and b
d)None
58- In byte stuffing, a special byte is added to the data section of the frame when there is a
character with the same pattern as the
a)flag
b)error
c)sender
d)destination
59- The techniques for efficient utilization of bandwidth includes
a)Multiplexing
b)medium linking
c)Sampling
d)Both A &C
60- How many bits in the data unit has changed in single bit error?
a)only 1
b)two bits
c)three bits
d)four bits
61- To guarantee the detection of up to s errors in all cases, the minimum hamming distance
in a block code must be
a)s
b)s+1
c)s-1
d)0
62- In block coding, we divide our message into blocks, is called
a)code blocks
b)packet blocks
c)code words
d)datawords
63- Find the parity bit for 1001011
a)0
b)1
c)2
d)None
64- In a constellation diagram, a signal element type is represented as a
a)Dot
b)line
c)x component
d)y component
65- The example of an analog to analog conversion is
a)radio
b)Video
c)Television
d)internet
66- The total bandwidth required for Amplitude Modulation (AM) is
a)2B
b)2(1 + β)B.
c)2L
d)2F
67-Switching in the Internet is done by using the datagram approach to packet switching at
the
a)network layer
b)application layer
c)data link layer
d)physical layer.
68- A Circuit-Switched Network is made of a set of switches connected by physical
a)links
b)media
c)nodes
d)lines
69- Iog28 =
a)0
b)1
c)2
d)3
70- A switch in a datagram network uses a
a)destination address
b)sender address
c)routing table
d)header
71- The routing processor searching for the routing table is called
a)switch fabric
b)buffer
c)table lookup
d)rolling table
72- Information can be represented as a sequence of
a)byte patterns
b)characters
c)bit patterns
d)images
73- The parameter that refers to the recording and broadcasting of the picture is
a)Text
b)Audio
c)Image
d)Video
74- Both station can transmit and receive data simultaneously in
a)simplex mode
b)Half duplex mode
c)Full duplex mode
d)None of Above
75- In representation of text symbols, each set of the bit pattern is called
a)Code
b)Unicode
c)Coding
d)sequence
76- Data communications are the transfer of data through some
a)transmission medium
b)linear medium
c)Network LAN
d)Protocols
77-In Address Resolution Protocol (ARP), a packet is encapsulated directly into a
a)Data link Integer
b)Network Frame
c)Network Station
d)Data link Frame
78- The address space of IPv4 is
a)4294967296
b)4294965796
c)4266496296
d)6294967296
79- An Ethernet multicast physical address is in the range of
a)01 :00:5E:00:OO:OO to 01:00:5E:7F:FF:FF
b)2 :00:5E:00:OO:OO to 01:00:5E:7F:FF:FF
c)3 :00:5E:00:OO:OO to 01:00:5E:7F:FF:FF
d)4 :00:5E:00:OO:OO to 01:00:5E:7F:FF:FF
80- Subnetting is actually
a)Microwave networks
b)Sub division of networks
c)Absolute network
d)linear network
81- In the layer hierarchy as the data packet moves from the upper to the lower layers,
headers are ___________
a) Added
b) Removed
c) Rearranged
d) Modified
82- Communication between a computer and a keyboard involves ______________
transmission.
a) Automatic
b) Half-duplex
c) Full-duplex
d) Simplex
83- The first Network was called ________
a) CNNET
b) NSFNET
c) ASAPNET
d) ARPANET
84- A _________ set of rules that governs data communication.
a) Protocols
b) Standards
c) RFCs
d) Servers
85- Which transmission media provides the highest transmission speed in a network?
a) coaxial cable
b) twisted pair cable
c) optical fiber
d) electrical cable
86- Bits can be sent over guided and unguided media as analog signal by ___________
a) digital modulation
b) amplitude modulation
c) frequency modulation
d) phase modulation
87- The physical layer provides __________
a) mechanical specifications of electrical connectors and cables
b) electrical specification of transmission line signal level
c) specification for IR over optical fiber
d) all of the mentioned
88-The physical layer is responsible for __________
a) line coding
b) channel coding
c) modulation
d) all of the mentioned
89- A single channel is shared by multiple signals by ____________
a) analog modulation
b) digital modulation
c) multiplexing
d) phase modulation
90- Wireless transmission of signals can be done via ___________
a) radio waves
b) microwaves
c) infrared
d) all of the mentioned
91- Which of the following tasks is not done by data link layer?
a) framing
b) error control
c) flow control
d) channel coding
92- Header of a frame generally contains ______________
a) synchronization bytes
b) addresses
c) frame identifier
d) all of the mentioned
93- Automatic repeat request error management mechanism is provided by ________
a) logical link control sublayer
b) media access control sublayer
c) network interface control sublayer
d) application access control sublayer
94- When 2 or more bits in a data unit has been changed during the transmission, the error is
called ____________
a) random error
b) burst error
c) inverted error
d) double error
95-CRC stands for __________
a) cyclic redundancy check
b) code repeat check
c) code redundancy check
d) cyclic repeat check
96- Which network topology requires a central controller or hub?
a) Star
b) Mesh
c) Ring
d) Bus
97- Data communication system within a building or campus is________
a) LAN
b) WAN
c) MAN
d) PAN
98- WAN stands for __________
a) World area network
b) Wide area network
c) Web area network
d) Web access network
99- In TDM, slots are further divided into __________
a) Seconds
b) Frames
c) Packets
d) Bits
100- _____ is the multiplexing technique that shifts each signal to a different carrier
frequency.
a) FDM
b) TDM
c) Both FDM & TDM
d) PDM
101- If link transmits 4000frames per second, and each slot has 8 bits, the transmission rate
of circuit this TDM is _________
a) 32kbps
b) 500bps
c) 500kbps
d) 32bps
102-The network layer is concerned with __________ of data.
a) bits
b) frames
c) packets
d) bytes
103-A 4 byte IP address consists of __________
a) only network address
b) only host address
c) network address & host address
d) network address & MAC address
104- The network layer protocol for internet is __________
a) ethernet
b) internet protocol
c) hypertext transfer protocol
d) file transfer protocol
105-Which of this is not a guided media?
a) Fiber optical cable
b) Coaxial cable
c) Wireless LAN
d) Copper wire
106-Coaxial cable consists of _______ concentric copper conductors.
a) 1
b) 2
c) 3
d) 4
107-Fiber optics posses following properties __________
a) Immune electromagnetic interference
b) Very less signal attenuation
c) Very hard to tap
d) All of the mentioned
108-Geostationary satellites ___________
a) Are placed at a fixed point above the earth
b) Rotate the earth about a fixed axis
c) Rotate the earth about a varying axis
d) All of the mentioned
109- Radio channels are attractive medium because __________
a) Can penetrate walls
b) Connectivity can be given to mobile user
c) Can carry signals for long distance
d) All of the mentioned
110-Transport layer aggregates data from different applications into a single stream before
passing it to ____________
a) network layer
b) data link layer
c) application layer
d) physical layer
111- Which of the following are transport layer protocols used in networking?
a) TCP and FTP
b) UDP and HTTP
c) TCP and UDP
d) HTTP and FTP
112- Transport layer protocols deals with ____________
a) application to application communication
b) process to process communication
c) node to node communication
d) man to man communication
113-If there are N routers from source to destination, the total end to end delay in sending
packet P(L-> number of bits in the packet R-> transmission rate) is equal to ______________
a) N
b) (N*L)/R
c) (2N*L)/R
d) L/R
114- What are the Methods to move data through a network of links and switches?
a) Packet switching and Line switching
b) Circuit switching and Line switching
c) Line switching and bit switching
d) Packet switching and Circuit switching
115- Which of the following is not an application layer service?
a) Network virtual terminal
b) File transfer, access, and management
c) Mail service
d) Error control
116-In _________ systems, resources are allocated on demand.
a) packet switching
b) circuit switching
c) line switching
d) frequency switching
117-For a 10Mbps Ethernet link, if the length of the packet is 32bits, the transmission delay is
____________ (in microseconds)
a) 3.2
b) 32
c) 0.32
d) 320
118- In the transfer of file between server and client, if the transmission rates along the path
is 10Mbps, 20Mbps, 30Mbps, 40Mbps. The throughput is usually ___________
a) 20Mbps
b) 10Mbps
c) 40Mbps
d) 50Mbps
119- Transmission delay does not depend on _____________
a) Packet length
b) Distance between the routers
c) Transmission rate
d) Bandwidth of medium
120- Propagation delay depends on ___________
a) Packet length
b) Transmission rate
c) Distance between the routers
d) Speed of the CPU
