This post contains very important MCQ's for Computer networks & security to prepare your interviews and exams easily...
Computer Networking and security important MCQ's for preparing interviews & exams - Part 3
Q.no 1. ______ is a communication protocol of the data link layer that is used to transmit multiprotocol data between two directly connected computers.
A : Point - to - Point Protocol (PPP)
B : Internet Protocol
C : Transmission Control Protocol
D : Single Point - to - Multi Point Protocol (SPM)
Answer:- A : Point - to - Point Protocol (PPP)
Q.no 2. Which of the following statements is TRUE about CSMA with collision detection
A : 135 frames
B : 92 frames
C : 38 frames
D : 156 frames
Answer:- A : 135 frames
Q.no 3. In wireless network most of the energy is lost during transmission. How many percentage of additional energy is added if there is collision
A : 135 frames
B : 92 frames
C : 38 frames
D : 156 frames
Answer:- B : 92 frames
Q.no 4. The Stop-And-Wait ARQ, Go-Back-N ARQ, and the Selective Repeat ARQ are for ______ channels.
A : signal
B : wireless
C : noisy
D : noiseless
Answer:- C : noisy
Q.no 5. Network congestion occurs _________
A : in case of traffic overloading
B : when a system terminates
C : when connection between two nodes terminates
D : in case of transfer failure
Answer:- A : in case of traffic overloading
Q.no 6. Suppose a TCP connection is transferring a file of 1000 bytes. The first byte is numbered 10001. What is the sequence number of the segment if all data is sent in only one segment?
A : 10000
B : 10001
C : 12001
D : 11001
Answer:- B : 10001
Q.no 7. ____ refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgment.
A : Flow control
B : Speed control
C : Error control
D : Data control
Answer:- A : Flow control
Q.no 8. 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
Answer:- C : network address & host address
Q.no 9. In TCP IP Model, when data is sent from device A to device B, the 5th layer to receive data at B is ____________
A : Application layer
B : Transport layer
C : Link layer
D : Session layer
Answer:- A : Application layer
Q.no 10. IPv6 does not support which of the following addressing modes?
A : unicast addressing
B : multicast addressing
C : broadcast addressing
D : anycast addressing
Answer:- C : broadcast addressing
Q.no 11. Simplex protocol of Data Link Layer works on ____ channels
A : noiseless
B : broadband
C : noisy
D : creative
Answer:- A : noiseless
Q.no 12. Each frame in HDLC protocol may contain up ___ fields
A : 4
B : 5
C : 6
D : 7
Answer:- C : 6
Q.no 13. Which of the following is correct IPv4 address?
A : 124.201.3.1.52
B : 300.142.210.64
C : 10110011.32.16.8
D : 128.64.0.0
Answer:- D : 128.64.0.0
Q.no 14. Which of the following routing protocol used for network layer design?
A : Static Routing Algorithm
B : Distance vector routing Protocol
C : Dynamic Routing Algorithm
D : Hybrid Routing Algorithm
Answer:- B : Distance vector routing Protocol
Q.no 15. What does the java.net.InetAddress class represent?
A : Socket
B : IP Address
C : Protocol
D : MAC Address
Answer:- B : IP Address
Q.no 16. Define the type of the following destination MAC address 4A:30:10:21:10:1A
A : IEEE 802.11 wireless LAN runs CSMA with collision detection protocol
B : Ethernet is not based on CSMA with collision detection protocol
C : CSMA with collision detection is not suitable for a high propagation delay network like satellite network
D : There is no contention in a CSMA with collision detection network
Answer:- C : CSMA with collision detection is not suitable for a high propagation delay network like satellite network
Q.no 17. For which one of the following reasons does Internet Protocol (IP) use the timeto- live (TTL) field in the IP datagram header
A : Ensure packets reach destination within that time
B : Discard packets that reach later than that time
C : prevent packets from looping indefinitily
D : Limit the time for which the packet gets queued in intermediate routers
Answer:- C : prevent packets from looping indefinitily
Q.no 18. The right to use a domain name is delegated by domain name registers which are accredited by _______
A : internet architecture board
B : internet society
C : internet research task force
D : internet corporation for assigned names and numbers
Answer:- D : internet corporation for assigned names and numbers
Q.no 19. In _________, the station configuration is unbalanced. We have one primary station and multiple secondary stations.
A : ARM
B : NBM
C : NRM
D : ABM
Answer:- C : NRM
Q.no 20. In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________
A : Application layer
B : Transport layer
C : Link layer
D : Session layer
Answer:- D : Session layer
