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Computer Networks MCQs

998+ questions with answers

51

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
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52

The physical layer is responsible for __________

a line coding
b channel coding
c modulation
d all of the mentioned
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53

The physical layer translates logical communication requests from the ______ into hardware specific operations.

a data link layer
b network layer
c trasnport layer
d application layer
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54

A single channel is shared by multiple signals by ____________

a analog modulation
b digital modulation
c multiplexing
d phase modulation
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55

Wireless transmission of signals can be done via ___________

a radio waves
b microwaves
c infrared
d all of the mentioned
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56

The data link layer takes the packets from _________ and encapsulates them into frames for transmission.

a network layer
b physical layer
c transport layer
d application layer
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57

Which of the following tasks is not done by data link layer?

a framing
b error control
c flow control
d channel coding
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58

Which sublayer of the data link layer performs data link functions that depend upon the type of medium?

a logical link control sublayer
b media access control sublayer
c network interface control sublayer
d error control sublayer
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59

Header of a frame generally contains ______________

a synchronization bytes
b addresses
c frame identifier
d all of the mentioned
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60

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
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61

CRC stands for __________

a cyclic redundancy check
b code repeat check
c code redundancy check
d cyclic repeat check
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62

Which of the following is a data link protocol?

a ethernet
b point to point protocol
c hdlc
d all of the mentioned
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63

Which of the following is the multiple access protocol for channel access control?

a CSMA/CD
b CSMA/CA
c Both CSMA/CD & CSMA/CA
d HDLC
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64

The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called ____________

a piggybacking
b cyclic redundancy check
c fletcher’s checksum
d parity check
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65

The network layer is concerned with __________ of data.

a bits
b frames
c packets
d bytes
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66

Which one of the following is not a function of network layer?

a routing
b inter-networking
c congestion control
d error control
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67

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
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68

In virtual circuit network each packet contains ___________

a full source and destination address
b a short VC number
c only source address
d only destination address
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69

Which of the following routing algorithms can be used for network layer design?

a shortest path algorithm
b distance vector routing
c link state routing
d all of the mentioned
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70

A subset of a network that includes all the routers but contains no loops is called ________

a spanning tree
b spider structure
c spider tree
d special tree
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71

Which one of the following algorithm is not used for congestion control?

a traffic aware routing
b admission control
c load shedding
d routing information protocol
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72

The network layer protocol for internet is __________

a ethernet
b internet protocol
c hypertext transfer protocol
d file transfer protocol
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73

ICMP is primarily used for __________

a error and diagnostic functions
b addressing
c forwarding
d routing
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74

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
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75

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
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76

User datagram protocol is called connectionless because _____________

a all UDP packets are treated independently by transport layer
b it sends data as a stream of related packets
c it is received in the same order as sent order
d it sends data very quickly
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77

Transmission control protocol ___________

a is a connection-oriented protocol
b uses a three way handshake to establish a connection
c receives data from application as a single stream
d all of the mentioned
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78

An endpoint of an inter-process communication flow across a computer network is called __________

a socket
b pipe
c port
d machine
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79

Which one of the following is a version of UDP with congestion control?

a datagram congestion control protocol
b stream control transmission protocol
c structured stream transport
d user congestion control protocol
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80

A _____ is a TCP name for a transport service access point.

a port
b pipe
c node
d protocol
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81

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
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82

Which of the following is a transport layer protocol?

a stream control transmission protocol
b internet control message protocol
c neighbor discovery protocol
d dynamic host configuration protocol
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83

Physical or logical arrangement of network is __________

a Topology
b Routing
c Networking
d Control
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84

Which network topology requires a central controller or hub?

a Star
b Mesh
c Ring
d Bus
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85

_______ topology requires a multipoint connection.

a Star
b Mesh
c Ring
d Bus
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86

Data communication system spanning states, countries, or the whole world is ________

a LAN
b WAN
c MAN
d PAN
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87

Data communication system within a building or campus is________

a LAN
b WAN
c MAN
d PAN
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88

In TDM, slots are further divided into __________

a Seconds
b Frames
c Packets
d Bits
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89

_____ is the multiplexing technique that shifts each signal to a different carrier frequency.

a FDM
b TDM
c Both FDM & TDM
d PDM
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90

The three topologies associated with LANs are _________

a Mesh, Tree and Bus topology
b Tree, Circular and Ring topology
c Bus, Ring and Star topology
d Hybrid, Mesh and Star topology
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91

A pseudo topology that combines a Star topology with either Ring or Bus topology is known as ___________

a Router
b Hub
c Ethernet
d Switches
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92

The Tree topology is employed in network using ________

a Brouters
b LAN
c Switches
d WAN
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93

________ topology is a combination of two or more topologies.

a Star
b Hybrid
c Bus
d Ring
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94

The two types of LAN deployed are __________ and ___________

a Mesh based, Bus based
b Hybrid based, Star based
c Bus based, Ring based
d Ring based, Tree based
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95

Token Ring and FDDI configurations use the _________ topology.

a ring
b star
c mesh
d bus
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96

Which protocol is most frequently used in Star topology?

a Modem
b Cable
c DSL
d Ethernet
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97

The diagram given below represents ___________

a Fully connected topology
b Mesh topology
c Star topology
d Hybrid topology
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98

WANs are configured using the ______ or the ______ topology.

a Bus, Tree
b Mesh, Ring
c Ring, Hybrid
d Mesh, Tree
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99

FDDI stands for _________

a Fiber Distributed Data Interface
b First Digital Data Interface
c Fast Data Distribution Index
d Fiber Distributed Data Index
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100

Ethernet protocol is specified by __________

a IEEE 802.2 standard
b IEEE 802.3 standard
c IEEE 802.5 standard
d IEEE 802.11 standard
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