Practice MCQ Computer Networks

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1733 Computer Network is
Options: Collection of hardware components and computers B.  Interconnected by communication channels C.  Sharing of resources and information D.  All of the Above

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1734 What is a Firewall in Computer Network?
Options: The physical boundary of Network B.  An operating System of Computer Network       C.  A system designed to prevent unauthorized access D.  A web browsing Software

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1735 How many layers does OSI Reference Model has?
Options: 4 B.  5 C.  6 D.  7

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1736 DHCP is the abbreviation of
Options: Dynamic Host Control Protocol B.  Dynamic Host Configuration Protocol C.  Dynamic Hyper Control Protocol D.  Dynamic Hyper Configuration Protocol

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1737 IPV4 Address is
Options: 8 bit B.  16 bit C.  32 bit D.  64 bit

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1738 DNS is the abbreviation of
Options: Dynamic Name System B.  Dynamic Network System C.  Domain Name System D.  Domain Network Service

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1739 What is the meaning of Bandwidth in Network?
Options: Transmission capacity of a communication channels B.  Connected Computers in the Network C.  Class of IP used in Network D.  None of Above

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1740 ADSL is the abbreviation of
Options: Asymmetric Dual Subscriber Line B.  Asymmetric Digital System Line C.  Asymmetric Dual System Line D.  Asymmetric Digital Subscriber Line

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1741 What is the use of Bridge in Network?
Options: to connect LANs B.  to separate LANs C.  to control Network Speed D.  All of the above

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1742 Router operates in which layer of OSI Reference Model?
Options: Layer 1 (Physical Layer) B.  Layer 3 (Network Layer) C.  Layer 4 (Transport Layer) D.  Layer 7 (Application Layer)

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1743 Each IP packet must contain
Options:Only Source address B. Only Destination address C. Source and Destination address D. Source or Destination address

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1744 Bridge works in which layer of the OSI model?
Options:Appliation layer B. Transport layer                    C. Network layer D. Datalink layer

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1745 _______ provides a connection-oriented reliable service for sending messages
Options:TCP B. IP C. UDP D. All of the above

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1746 Which layers of the OSI model are host-to-host layers?
Options:Transport, Session, Persentation, Application B. Network, Transport, Session, Presentation C. Datalink, Network, Transport, Session D. Physical, Datalink, Network, Transport

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1747 Which of the following IP address class is Multicast
Options:Class A B. Class B C. Class C D. Class D

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1748 Which of the following is correct regarding Class B Address of IP address
Options:Network bit – 14, Host bit – 16 B. Network bit – 16, Host bit – 14 C. Network bit – 18, Host bit – 16 D. Network bit – 12, Host bit – 14

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1749 The last address of IP address represents
Options:Unicast address B. Network address C. Broadcast address D. None of above

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1750 How many bits are there in the Ethernet address?
Options:64 bits B. 48 bits C. 32 bits D. 16 bits

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1751 How many layers are in the TCP/IP model?
Options:4 layers B. 5 layers C. 6 layers D. 7 layers

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1752 Which of the following layer of OSI model also called end-to-end layer?
Options:Presentation layer B. Network layer C. Session layer D. Transport layer

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1753 Why IP Protocol is considered as unreliable?
Options:A packet may be lost B. Packets may arrive out of order C. Duplicate packets may be generated D. All of the above

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1754 What is the minimum header size of an IP packet?
Options:16 bytes B. 10 bytes             C. 20 bytes D. 32 bytes

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1755 Which of following provides reliable communication?
Options:TCP B. IP C. UDP D. All of the above

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1756 What is the address size of IPv6 ?
Options:32 bit B. 64 bit C. 128 bit D. 256 bit

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1757 What is the size of Network bits & Host bits of Class A of IP address?
Options:Network bits 7, Host bits 24 B. Network bits 8, Host bits 24 C. Network bits 7, Host bits 23 D. Network bits 8, Host bits 23

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1758 What does Router do in a network?
Options:Forwards a packet to all outgoing links B. Forwards a packet to the next free outgoing link C. Determines on which outing link a packet is to be forwarded D. Forwards a packet to all outgoing links except the originated link

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1759 The Internet is an example of
Options:Cell switched network B. circuit switched network C. Packet switched network D. All of above

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1760 What does protocol defines?
Options:Protocol defines what data is communicated. B. Protocol defines how data is communicated. C. Protocol defines when data is communicated. D. All of above

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1761 What is the uses of subnetting?
Options:It divides one large network into several smaller ones B. It divides network into network classes C. It speeds up the speed of network D. None of above

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1762 . Repeater operates in which layer of the OSI model?
Options:Physical layer B. Data link layer C. Network layer D. Transport layer

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1763 What is the benefit of the Networking?
Options:File Sharing B. Easier access to Resources C. Easier Backups D. All of the Above

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1764 Which of the following is not the Networking Devices?
Options:Gateways B. Linux             C. Routers D. Firewalls

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1765 What is the size of MAC Address?
Options:16-bits B. 32-bits C. 48-bits D. 64-bits

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1766 Which of the following can be Software?
Options:Routers B. Firewalls C. Gateway D. Modems

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1767 What is the use of Ping command?
Options:To test a device on the network is reachable B. To test a hard disk fault C. To test a bug in a Application D. To test a Pinter Quality

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1768 MAC Address is the example of
Options:Transport Layer B. Data Link Layer C. Application Layer D. Physical Layer

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1769 Routing tables of a router keeps track of
Options:MAC Address Assignments B. Port Assignments to network devices C. Distribute IP address to network devices D. Routes to use for forwarding data to its destination

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1770 Layer-2 Switch is also called
Options:Multiport Hub B. Multiport Switch C. Multiport Bridge D. Multiport NIC

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1771 Difference between T568A and T568B is
Options:Difference in wire color B. Difference in number of wires C. Just different length of wires D. Just different manufacturer standards

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1772 . The meaning of Straight-through Cable is
Options:Four wire pairs connect to the same pin on each end B. The cable Which Directly connects Computer to Computer C. Four wire pairs not twisted with each other D. The cable which is not twisted

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1773 Which of the following is not the External Security Threats?
Options:Front-door Threats B. Back-door Threats C. Underground Threats D. Denial of Service (DoS)

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1774 What is the Demilitarized Zone?
Options:The area between firewall & connection to an external network B. The area between ISP to Military area             C. The area surrounded by secured servers D. The area surrounded by the Military

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1775 What is the full form of RAID ?
Options:Redundant Array of Independent Disks B. Redundant Array of Important Disks C. Random Access of Independent Disks D. Random Access of Important Disks

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1776 What is the maximum header size of an IP packet?
Options:32 bytes B. 64 bytes C. 30 bytes D. 60 bytes

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1777 What is the size of Host bits in Class B of IP address?
Options:04 B. 08 C. 16 D. 32

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1778 What is the usable size of Network bits in Class B of IP address?
Options:04 B. 08 C. 14 D. 16

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1779 In which type of RAID, data is mirrored between two disks.
Options:RAID 0 B. RAID 1 C. RAID 2 D. RAID 3

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1780 What do you mean by broadcasting in Networking?
Options:It means addressing a packet to all machine B. It means addressing a packet to some machine C. It means addressing a packet to a particular machine D. It means addressing a packet to except a particular machine

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1781 Which of the following is/are Protocols of Application?
Options:FTP B. DNS C. Telnet D. All of above

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1782 Which of the following protocol is/are defined in Transport layer?
Options:FTP B. TCP C. UDP D. B & C

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