FREE COMPUTER SCIENCE MCQS WITH ANSWER by General knowledge Solutions
FREE COMPUTER SCIENCE MCQS WITH ANSWER by General knowledge Solutions
1. In which mode FTP, the client initiates both the control
and data connections.
a) active mode
b) passive mode
c) both (a) and (b)
d) none of them
Answer:b Explanation:None.
2. The file transfer protocol is built on
a) data centric architecture
b) service oriented architecture
c) client server architecture
d) none of them
Answer:c Explanation:None.
3. In file transfer protocol, data transfer can be done in
a) stream mode
b) block mode
c) compressed mode
d) all of them
Answer:d Explanation:None.
4. Ethernet frame consists of
a) MAC address
b) IP address
c) both (a) and (b)
d) none of them
Answer:a Explanation:None.
5. What is stat frame delimeter (SFD) in ethernet frame?
a) 10101010
b) 10101011
c) 00000000
d) 11111111
Answer:b Explanation:None.
6. MAC address is of
a) 24 bits
b) 36 bits
c) 42 bits
d) 48 bits View Answer Answer:d Explanation:None.
7. What is autonegotiation?
a) a procedure by which two connected devices choose common transmission parameters
b) a security algorithm
c) a routing algorithm
d) none of them
Answer:a Explanation:None.
8. Ethernet in metropolitan area network (MAN) can be used as
a) pure ethernet
b) ethernet over SDH
c) ethernet over MPLS
d) all of them
Answer:d Explanation:None.
9. 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 View Answer
Answer:a Explanation:None.
10. High speed ethernet works on
a) coaxial cable
b) twisted pair cable
c) optical fiber
d) none of the mentioned View Answer
Answer:c Explanation:None.
11. The maximum size of payload field in ethernet frame is
a) 1000 bytes
b) 1200 bytes
c) 1300 bytes
d) 1500 bytes View Answer
Answer:d Explanation:None.
12. What is interframe gap?
a) idle time between frames
b) idle time between frame bits
c) idle time between packets
d) none of the mentioned View Answer
Answer:a Explanation:None.
13. An ethernet frame that is less than the IEEE 802.3 minimum length of 64 octets is called
a) short frame
b) run frame
c) mini frame
d) man frame View Answer
Answer:b Explanation:None.
. 14) Physical or logical arrangement of network is
a) Topology
b) Routing
c) Networking
d) None of the mentioned View Answer
Answer: a Explanation: None.
15) In this topology there is a central controller or hub
a) Star
b) Mesh
c) Ring
d) Bus View Answer
Answer: a Explanation: None.
16) This topology requires multipoint connection
a) Star
b) Mesh
c) Ring
d) Bus View Answer
Answer: d Explanation: None.
17) Data communication system spanning states, countries, or the whole world is
a) LAN
b) WAN
c) MAN
d) None of the mentioned View Answer
Answer: b Explanation:Wide area network(WAN) covers the whole of the world network.
18) Data communication system within a building or campus is
a) LAN
b) WAN
c) MAN
d) None of the mentioned View Answer
Answer: a Explanation: None.
19) Expand WAN
a) World area network
b) Wide area network
c) Web area network
d) None of the mentioned View Answer
Answer: b Explanation: None.
This set of Computer Networks Questions & Answers focuses on “Packet Switching and Circuit Switching”.
20) A local telephone network is an example of a _______ network
a) Packet switched
b) Circuit switched
c) both of the mentioned
d) none of the mentioned View Answer
Answer: a Explanation: None.
21) Most packet switches use this principle
a) Stop and wait
b) Store and forward
c) Both of the mentioned
d) None of the mentioned View Answer
Answer: b Explanation: The packet switch will not transmit the first bit to outbound link until it recieves the entire packet.
22) If there are N routers from source to destination, total end to end delay in sending packet P(L->number of bits in the packet R-> transmission rate)
a) N
b) (N*L)/R
c) (2N*L)/R
d) L/R View Answer
Answer: b Explanation: None.
23) Method(s) to move data through a network of links and switches
a) Packet switching
b) Circuit switching
c) Line switching
d) Both a and b View Answer
Answer: d Explanation: None.
24) The resources needed for communication between end systems are reserved for the duration of session between end systems in ________
a) Packet switching
b) Circuit switching
c) Line switching
d) Frequency switching View Answer
Answer: b Explanation: None.
25) As the resouces are reserved between two communicating end systems in circuit switching, this is achieved
a) authentication
b) guaranteed constant rate
c) reliability
d) store and forward View Answer
Answer: b Explanation: None.
26) In _________ resources are allocated on demand.
a) packet switching
b) circuit switching
c) line switching
d) frequency switching View Answer
Answer: a Explanation: In packet switching there is no reservation
This set of Computer Networks Questions & Answers focuses on “IPv4″.
27. Which of the following is not applicable for IP?
a) Error reporting
b) Handle addressing conventions
c) Datagram format
d) Packet handling conventions View Answer
Answer: a Explanation: Error reporting is handled by ICMP.
28. Which of the following field in IPv4 datagram is not related to fragmentation?
a) Flags
b) Offset
c) TOS
d) Identifier View Answer
Answer: c Explanation: TOS-type of service identifies the type of packets.
29. The TTL field has value 10. How many routers (max) can process this datagram?
a) 11
b) 5
c) 10
d) 1 View Answer Answer: c Explanation: TTL field is decremented by one each time the datagram is processed by a router.
30. If the value in protocol field is 17, the transport layer protocol used is ____.
a) TCP
b) UDP
c) Either of the mentioned
d) None of the mentioned View Answer
Answer: b Explanation: For TCP it is 6.
31. The data field can carry which of the following?
a) TCP segemnt
b) UDP segment
c) ICMP messages
d) None of the mentioned View Answer
Answer: c Explanation: Data field usually has tranaport layer segment, but it can also carry ICMP messages.
32. What should be the flag value to indicate the last fragment?
a) 0
b) 1
c) TTl value
d) None of the mentioned View Answer
Answer: a Explanation: flag=0 indicates that it is the last fragment.
33. Which of these is not applicable for IP protocol?
a) is connectionless
b) offer reliable service
c) offer unreliable service
d) None of the mentioned View Answer
Answer: b Explanation: Ip offers unreliable service.
34. Fragmentation has following demerits
a) complicates routers
b) open to DOS attack
c) overlapping of fragments.
d) All of the mentioned View Answer
Answer: d Explanation: Fragmentation makes the implementation complex and also can create DOS attack.
35. Which field helps to check rearrangement of the fragments?
a) offset
b) flag
c) TTL
d) identifer View Answer
Answer: a Explanation: offset field specifies where the fragment fits in the original datagram
a) active mode
b) passive mode
c) both (a) and (b)
d) none of them
Answer:b Explanation:None.
2. The file transfer protocol is built on
a) data centric architecture
b) service oriented architecture
c) client server architecture
d) none of them
Answer:c Explanation:None.
3. In file transfer protocol, data transfer can be done in
a) stream mode
b) block mode
c) compressed mode
d) all of them
Answer:d Explanation:None.
4. Ethernet frame consists of
a) MAC address
b) IP address
c) both (a) and (b)
d) none of them
Answer:a Explanation:None.
5. What is stat frame delimeter (SFD) in ethernet frame?
a) 10101010
b) 10101011
c) 00000000
d) 11111111
Answer:b Explanation:None.
6. MAC address is of
a) 24 bits
b) 36 bits
c) 42 bits
d) 48 bits View Answer Answer:d Explanation:None.
7. What is autonegotiation?
a) a procedure by which two connected devices choose common transmission parameters
b) a security algorithm
c) a routing algorithm
d) none of them
Answer:a Explanation:None.
8. Ethernet in metropolitan area network (MAN) can be used as
a) pure ethernet
b) ethernet over SDH
c) ethernet over MPLS
d) all of them
Answer:d Explanation:None.
9. 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 View Answer
Answer:a Explanation:None.
10. High speed ethernet works on
a) coaxial cable
b) twisted pair cable
c) optical fiber
d) none of the mentioned View Answer
Answer:c Explanation:None.
11. The maximum size of payload field in ethernet frame is
a) 1000 bytes
b) 1200 bytes
c) 1300 bytes
d) 1500 bytes View Answer
Answer:d Explanation:None.
12. What is interframe gap?
a) idle time between frames
b) idle time between frame bits
c) idle time between packets
d) none of the mentioned View Answer
Answer:a Explanation:None.
13. An ethernet frame that is less than the IEEE 802.3 minimum length of 64 octets is called
a) short frame
b) run frame
c) mini frame
d) man frame View Answer
Answer:b Explanation:None.
. 14) Physical or logical arrangement of network is
a) Topology
b) Routing
c) Networking
d) None of the mentioned View Answer
Answer: a Explanation: None.
15) In this topology there is a central controller or hub
a) Star
b) Mesh
c) Ring
d) Bus View Answer
Answer: a Explanation: None.
16) This topology requires multipoint connection
a) Star
b) Mesh
c) Ring
d) Bus View Answer
Answer: d Explanation: None.
17) Data communication system spanning states, countries, or the whole world is
a) LAN
b) WAN
c) MAN
d) None of the mentioned View Answer
Answer: b Explanation:Wide area network(WAN) covers the whole of the world network.
18) Data communication system within a building or campus is
a) LAN
b) WAN
c) MAN
d) None of the mentioned View Answer
Answer: a Explanation: None.
19) Expand WAN
a) World area network
b) Wide area network
c) Web area network
d) None of the mentioned View Answer
Answer: b Explanation: None.
This set of Computer Networks Questions & Answers focuses on “Packet Switching and Circuit Switching”.
20) A local telephone network is an example of a _______ network
a) Packet switched
b) Circuit switched
c) both of the mentioned
d) none of the mentioned View Answer
Answer: a Explanation: None.
21) Most packet switches use this principle
a) Stop and wait
b) Store and forward
c) Both of the mentioned
d) None of the mentioned View Answer
Answer: b Explanation: The packet switch will not transmit the first bit to outbound link until it recieves the entire packet.
22) If there are N routers from source to destination, total end to end delay in sending packet P(L->number of bits in the packet R-> transmission rate)
a) N
b) (N*L)/R
c) (2N*L)/R
d) L/R View Answer
Answer: b Explanation: None.
23) Method(s) to move data through a network of links and switches
a) Packet switching
b) Circuit switching
c) Line switching
d) Both a and b View Answer
Answer: d Explanation: None.
24) The resources needed for communication between end systems are reserved for the duration of session between end systems in ________
a) Packet switching
b) Circuit switching
c) Line switching
d) Frequency switching View Answer
Answer: b Explanation: None.
25) As the resouces are reserved between two communicating end systems in circuit switching, this is achieved
a) authentication
b) guaranteed constant rate
c) reliability
d) store and forward View Answer
Answer: b Explanation: None.
26) In _________ resources are allocated on demand.
a) packet switching
b) circuit switching
c) line switching
d) frequency switching View Answer
Answer: a Explanation: In packet switching there is no reservation
This set of Computer Networks Questions & Answers focuses on “IPv4″.
27. Which of the following is not applicable for IP?
a) Error reporting
b) Handle addressing conventions
c) Datagram format
d) Packet handling conventions View Answer
Answer: a Explanation: Error reporting is handled by ICMP.
28. Which of the following field in IPv4 datagram is not related to fragmentation?
a) Flags
b) Offset
c) TOS
d) Identifier View Answer
Answer: c Explanation: TOS-type of service identifies the type of packets.
29. The TTL field has value 10. How many routers (max) can process this datagram?
a) 11
b) 5
c) 10
d) 1 View Answer Answer: c Explanation: TTL field is decremented by one each time the datagram is processed by a router.
30. If the value in protocol field is 17, the transport layer protocol used is ____.
a) TCP
b) UDP
c) Either of the mentioned
d) None of the mentioned View Answer
Answer: b Explanation: For TCP it is 6.
31. The data field can carry which of the following?
a) TCP segemnt
b) UDP segment
c) ICMP messages
d) None of the mentioned View Answer
Answer: c Explanation: Data field usually has tranaport layer segment, but it can also carry ICMP messages.
32. What should be the flag value to indicate the last fragment?
a) 0
b) 1
c) TTl value
d) None of the mentioned View Answer
Answer: a Explanation: flag=0 indicates that it is the last fragment.
33. Which of these is not applicable for IP protocol?
a) is connectionless
b) offer reliable service
c) offer unreliable service
d) None of the mentioned View Answer
Answer: b Explanation: Ip offers unreliable service.
34. Fragmentation has following demerits
a) complicates routers
b) open to DOS attack
c) overlapping of fragments.
d) All of the mentioned View Answer
Answer: d Explanation: Fragmentation makes the implementation complex and also can create DOS attack.
35. Which field helps to check rearrangement of the fragments?
a) offset
b) flag
c) TTL
d) identifer View Answer
Answer: a Explanation: offset field specifies where the fragment fits in the original datagram
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