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Computer Networks MCQs

998+ questions with answers

701

__________ command is used to manipulate TCP/IP routing table.

a route
b Ipconfig
c Ifconfig
d Traceroute
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702

If you want to find the number of routers between a source and destination, the utility to be used is ___________

a route
b Ipconfig
c Ifconfig
d Traceroute
Medium
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703

__________ allows checking if a domain is available for registration.

a Domain Check
b Domain Dossier
c Domain Lookup
d Domain registers
Medium
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704

Choose the wrong statement from the following.

a Nslookup is used to query a DNS server for DNS data
b Ping is used to check connectivity
c Pathping combines the functionality of ping with that of route
d Ifconfig can configure TCP/IP network interface parameters
Medium
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705

What is the hamming distance between the words 1010101, 1100110?

a 4
b 5
c 8
d 3
Medium
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706

What is the disadvantage of the burst errors over single bit errors in error detection and correction?

a Difficult to correct
b Difficult to detect
c High error rate
d Frequent occurring
Medium
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707

What is the minimum hamming distance between the words 0001, 0100, 0110, 1111?

a 1
b 2
c 3
d 4
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708

Which of the following is an error correcting code?

a Checksum
b Parity
c Cyclic redundancy check
d Hamming codes
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709

How many bits will be added to a data word to become a code word in simple parity check code?

a 1 bit
b 2 bits
c 0 bits
d 4 bits
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710

Which error correcting code works well for burst errors among the following?

a Cyclic redundancy check
b Hamming code
c Checksum
d Reed Solomon codes
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711

What is the maximum number of errors that can be detected using two-dimensional parity check code?

a 4
b 5
c 3
d 2
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712

Which of the following is not an error detecting code?

a Hamming code
b Checksum
c Parity check
d Cyclic redundancy check
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713

How cyclic redundancy check code can also be called?

a Fletcher’s checksum
b Polynomial code
c Generator polynomial code
d Checksum
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714

Which of the following are the types of basic protocols that are present in multiple access control in data link layer?

a Random, controlled, channelization
b Controlled, channelization
c Random, channelization
d Random, controlled, contributed
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715

Which aspect of the random-access protocols makes them contention methods?

a No rules for accessing medium
b Shared bandwidth
c Authorized access for medium
d Scheduling time for medium
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716

Why station need to wait random amount of time for re-transmission of the frame after collision in pure aloha?

a To prevent other stations
b To avoid more collisions
c To detect other collisions
d To get acknowledgment from the receiver
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717

Which strategy is used by the pure aloha to prevent the congestion caused by continuous re-transmitted frames?

a Aborts the re-transmission after 5 attempts
b A station is allowed to re-transmit for 2 times
c Restriction on the attempts for re-transmission
d Re-transmission has no restriction
Medium
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718

What is the vulnerable time of the pure aloha for fixed length of frames (T=frame time)?

a 2*T
b 3*T
c 1/2*T
d 5*T
Medium
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719

Which of the following type of multiple access protocols uses a scheme called β€œAuthorization from other stations”?

a Random access protocol
b Controlled access protocol
c Channelization
d Persistent method
Medium
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720

Which of the following persistent method of random-access protocol reduces the collisions and efficiency of the network?

a 1 – persistent
b Non persistent
c Persistent
d 1 – persistent and non-persistent
Medium
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721

What is the vulnerable time in carrier sense multiple access?

a T propagation
b T frame
c 2*T frame
d 2*T propagation
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722

Which of the following is not a channelization protocol?

a Frequency division multiple access
b Time division multiple access
c Code division multiple access
d Bandwidth division multiple access
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723

Which of the following is not a name for MAC(Media Access Control) in data link layer?

a Burned-in-address
b Hardware address
c Physical address
d Logical address
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724

What is the size of MAC address in medium access control sub layer?

a 48 bytes
b 48 bits
c 32 bits
d 32 bytes
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725

Which of the following is not a separator to be used in MAC address?

a Hyphen(-)
b Period(.)
c Colon(:)
d Dollar($)
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726

Which of the following is the correct sentence about MAC address?

a Represented in decimal
b 32-bit space is used
c Represented in hexadecimal
d Not used for communication
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727

What is the primary use of MAC filtering on wireless networks?

a Efficiency
b Speed
c Security
d Performance
Medium
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728

Which of the following is not a similarity between MAC and IP address?

a Unique
b Used for communication
c Every device should have it
d Both Operates on data link layer
Medium
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729

Which of the following hardware in our computer is embedded with MAC address?

a Keyboard
b NIC
c Chip
d Driver
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730

How many octets are dedicated to OUI(Organizationally unique identifier) in in 48 MAC address space?

a 5
b 3
c 2
d 4
Medium
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731

Ethernet frame consists of ____________

a MAC address
b IP address
c Default mask
d Network address
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732

What is start frame delimeter (SFD) in ethernet frame?

a 10101010
b 10101011
c 00000000
d 11111111
Medium
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733

MAC address is of ___________

a 24 bits
b 36 bits
c 42 bits
d 48 bits
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734

What is autonegotiation?

a a procedure by which two connected devices choose common transmission parameters
b a security algorithm
c a routing algorithm
d encryption algorithm
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735

Ethernet in metropolitan area network (MAN) can be used as ___________

a pure ethernet
b ethernet over SDH
c ethernet over MPLS
d all of the mentioned
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736

A point-to-point protocol over ethernet is a network protocol for __________

a encapsulating PPP frames inside ethernet frames
b encapsulating ehternet framse inside PPP frames
c for security of ethernet frames
d for security of PPP frames
Medium
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737

The maximum size of payload field in ethernet frame is __________

a 1000 bytes
b 1200 bytes
c 1300 bytes
d 1500 bytes
Medium
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738

What is interframe gap?

a idle time between frames
b idle time between frame bits
c idle time between packets
d idle time between networks
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739

An ethernet frame that is less than the IEEE 802.3 minimum length of 64 octets is called _______

a short frame
b runt frame
c mini frame
d man frame
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740

What is the access point (AP) in a wireless LAN?

a device that allows wireless devices to connect to a wired network
b wireless devices itself
c both device that allows wireless devices to connect to a wired network and wireless devices itself
d all the nodes in the network
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741

In wireless ad-hoc network _________

a access point is not required
b access point is must
c nodes are not required
d all nodes are access points
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742

Which multiple access technique is used by IEEE 802.11 standard for wireless LAN?

a CDMA
b CSMA/CA
c ALOHA
d CSMA/CD
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743

In wireless distribution system __________

a multiple access point are inter-connected with each other
b there is no access point
c only one access point exists
d access points are not required
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744

A wireless network interface controller can work in _______

a infrastructure mode
b ad-hoc mode
c both infrastructure mode and ad-hoc mode
d WDS mode
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745

In wireless network an extended service set is a set of ________

a connected basic service sets
b all stations
c all access points
d connected access points
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746

Which one of the following event is not possible in wireless LAN?

a collision detection
b acknowledgement of data frames
c multi-mode data transmission
d connection to wired networks
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747

What is Wired Equivalent Privacy (WEP)?

a security algorithm for ethernet
b security algorithm for wireless networks
c security algorithm for usb communication
d security algorithm for emails
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748

What is WPA?

a wi-fi protected access
b wired protected access
c wired process access
d wi-fi process access
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749

What is internet?

a a single network
b A collection of unrelated computers
c interconnection of local area networks
d interconnection of wide area networks
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750

To join the internet, the computer has to be connected to a _________

a internet architecture board
b internet society
c internet service provider
d different computer
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