Networking MCQs

Multiple Choice Question ofComputer Networking

Networking Questions

1-1 Computer Network is
A.  Collection of hardware components and computers
B.  Interconnected by communication channels
C.  Sharing of resources and information
D.  All of the Above
1-2 What is a Firewall in Computer Network?
A.  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
1-3 How many layers does OSI Reference Model has?
A.  4
B.  5
C.  6
D.  7
1-4 DHCP is the abbreviation of
A.  Dynamic Host Control Protocol
B.  Dynamic Host Configuration Protocol
C.  Dynamic Hyper Control Protocol
D.  Dynamic Hyper Configuration Protocol
1-5 IPV4 Address is
A.  8 bit
B.  16 bit
C.  32 bit
D.  64 bit
1-6 DNS is the abbreviation of
A.  Dynamic Name System
B.  Dynamic Network System
C.  Domain Name System
D.  Domain Network Service
1-7 What is the meaning of Bandwidth in Network?
A.  Transmission capacity of a communication channels
B.  Connected Computers in the Network
C.  Class of IP used in Network
D.  None of Above



1-8 ADSL is the abbreviation of
A.  Asymmetric Dual Subscriber Line
B.  Asymmetric Digital System Line
C.  Asymmetric Dual System Line
D.  Asymmetric Digital Subscriber Line
1-9 What is the use of Bridge in Network?
A.  to connect LANs
B.  to separate LANs
C.  to control Network Speed
D.  All of the above
1-10 Router operates in which layer of OSI Reference Model?
A.  Layer 1 (Physical Layer)
B.  Layer 3 (Network Layer)
C.  Layer 4 (Transport Layer)
D.  Layer 7 (Application Layer)

---

Answers: 1 – D / 2 – C / 3 – D / 4 – B / 5 – C / 6 – C / 7 – A / 8 – D / 9 – A / 10 – B

2-1 Each IP packet must contain
A. Only Source address
B. Only Destination address
C. Source and Destination address
D. Source or Destination address

2-2 Bridge works in which layer of the OSI model?
A. Appliation layer
B. Transport layer                
C. Network layer
D. Datalink layer

2-3 _______ provides a connection-oriented reliable service for sending messages
A. TCP
B. IP
C. UDP
D. All of the above

2-4 Which layers of the OSI model are host-to-host layers?
A. Transport, Session, Persentation, Application
B. Network, Transport, Session, Presentation
C. Datalink, Network, Transport, Session
D. Physical, Datalink, Network, Transport

2-5 Which of the following IP address class is Multicast
A. Class A
B. Class B
C. Class C
D. Class D

2-6 Which of the following is correct regarding Class B Address of IP address
A. 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

2-7 The last address of IP address represents
A. Unicast address
B. Network address
C. Broadcast address
D. None of above

2-8 How many bits are there in the Ethernet address?
A. 64 bits
B. 48 bits
C. 32 bits
D. 16 bits

2-9 How many layers are in the TCP/IP model?
A. 4 layers
B. 5 layers
C. 6 layers
D. 7 layers

2-10 Which of the following layer of OSI model also called end-to-end layer?
A. Presentation layer
B. Network layer
C. Session layer
D. Transport layer

---

Answers: 1 – C / 2 – D / 3 – A / 4 – A / 5 – D / 6 – A / 7 – C / 8 – B / 9 – A / 10 – D

3-1. Why IP Protocol is considered as unreliable?
A. A packet may be lost
B. Packets may arrive out of order
C. Duplicate packets may be generated
D. All of the above

3-2. What is the minimum header size of an IP packet?
A. 16 bytes
B. 10 bytes          
C. 20 bytes
D. 32 bytes

3-3. Which of following provides reliable communication?
A. TCP
B. IP
C. UDP
D. All of the above

3-4. What is the address size of IPv6 ?
A. 32 bit
B. 64 bit
C. 128 bit
D. 256 bit

3-5. What is the size of Network bits & Host bits of Class A of IP address?
A. 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

3-6. What does Router do in a network?
A. 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

3-7. The Internet is an example of
A. Cell switched network
B. circuit switched network
C. Packet switched network
D. All of above

3-8. What does protocol defines?
A. Protocol defines what data is communicated.
B. Protocol defines how data is communicated.
C. Protocol defines when data is communicated.
D. All of above

3-9. What is the uses of subnetting?
A. 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

3-10. Repeater operates in which layer of the OSI model?
A. Physical layer
B. Data link layer
C. Network layer
D. Transport layer

---

Answers: 1 – D / 2 – C / 3 – A / 4 – C / 5 – A / 6 – C / 7 – C / 8 – D / 9 – A / 10 – A

4-1. What is the benefit of the Networking?
A. File Sharing
B. Easier access to Resources
C. Easier Backups
D. All of the Above

4-2. Which of the following is not the Networking Devices?
A. Gateways
B. Linux          
C. Routers
D. Firewalls

4-3. What is the size of MAC Address?
A. 16-bits
B. 32-bits
C. 48-bits
D. 64-bits

4-4. Which of the following can be Software?
A. Routers
B. Firewalls
C. Gateway
D. Modems

4-5. What is the use of Ping command?
A. 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

4-6. MAC Address is the example of
A. Transport Layer
B. Data Link Layer
C. Application Layer
D. Physical Layer

4-7. Routing tables of a router keeps track of
A. 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

4-8. Layer-2 Switch is also called
A. Multiport Hub
B. Multiport Switch
C. Multiport Bridge
D. Multiport NIC

4-9. Difference between T568A and T568B is
A. Difference in wire color
B. Difference in number of wires
C. Just different length of wires
D. Just different manufacturer standards

4-10. The meaning of Straight-through Cable is
A. 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

---

Answers: 1 – D / 2 – B / 3 – C / 4 – B / 5 – A / 6 – B / 7 – D / 8 – C / 9 – D / 10 – A

5-1 Which of the following is not the External Security Threats?
A. Front-door Threats
B. Back-door Threats
C. Underground Threats
D. Denial of Service (DoS)

5-2 What is the Demilitarized Zone?
A. 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

5-3 What is the full form of RAID ?
A. Redundant Array of Independent Disks
B. Redundant Array of Important Disks
C. Random Access of Independent Disks
D. Random Access of Important Disks

5-4 What is the maximum header size of an IP packet?
A. 32 bytes
B. 64 bytes
C. 30 bytes
D. 60 bytes

5-5 What is the size of Host bits in Class B of IP address?
A. 04
B. 08
C. 16
D. 32

5-6 What is the size of Network bits in Class B of IP address?
A. 04
B. 08
C. 14
D. 16

5-7 In which type of RAID, data is mirrored between two disks.
A. RAID 0
B. RAID 1
C. RAID 2
D. RAID 3

5-8 What do you mean by broadcasting in Networking?
A. 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

5-9 Which of the following is/are Protocols of Application?
A. FTP
B. DNS
C. Telnet
D. All of above

5-10 Which of the following protocol is/are defined in Transport layer?
A. FTP
B. TCP
C. UDP
D. B & C 

---

Answers:
1 – C / 2 – A / 3 – A / 4 – D / 5 – C / 6 – C / 7 – B / 8 – A / 9 – D / 10 – D