Practice MCQ Computer Networks

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2154 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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2155 How many layers does OSI Reference Model has?
Options: 4 B.  5 C.  6 D.  7

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2156 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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2157 IPV4 Address is
Options: 8 bit B.  16 bit C.  32 bit D.  64 bit

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2158 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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2159 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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2160 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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2161 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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2162 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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2163 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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2164 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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2165 _______ provides a connection-oriented reliable service for sending messages
Options:TCP B. IP C. UDP D. All of the above

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2166 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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2167 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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2168 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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2169 The last address of IP address represents
Options:Unicast address B. Network address C. Broadcast address D. None of above

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2170 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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2171 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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2172 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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2173 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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2174 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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2175 Which of following provides reliable communication?
Options:TCP B. IP C. UDP D. All of the above

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2176 What is the address size of IPv6 ?
Options:32 bit B. 64 bit C. 128 bit D. 256 bit

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2177 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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2178 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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2179 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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2180 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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2181 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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2182 . 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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2183 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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2184 Which of the following is not the Networking Devices?
Options:Gateways B. Linux             C. Routers D. Firewalls

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2185 What is the size of MAC Address?
Options:16-bits B. 32-bits C. 48-bits D. 64-bits

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2186 Which of the following can be Software?
Options:Routers B. Firewalls C. Gateway D. Modems

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2187 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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2188 MAC Address is the example of
Options:Transport Layer B. Data Link Layer C. Application Layer D. Physical Layer

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2189 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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2190 Layer-2 Switch is also called
Options:Multiport Hub B. Multiport Switch C. Multiport Bridge D. Multiport NIC

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2191 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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2192 . 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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2193 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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2194 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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2195 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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2196 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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2197 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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2198 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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2199 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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2200 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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2201 Which of the following is/are Protocols of Application?
Options:FTP B. DNS C. Telnet D. All of above

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2202 Which of the following protocol is/are defined in Transport layer?
Options:FTP B. TCP C. UDP D. B & C

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2203 What is the IP Address range of APIPA?
Options:169.254.0.1 to 169.254.0.254 B. 169.254.0.1 to 169.254.0.255 C. 169.254.0.1 to 169.254.255.254 D. 169.254.0.1 to 169.254.255.255

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