Computer Networks Questions & Answers – P2P
Applications
1. Which layer is responsible for
process-to-process delivery?
a) Physical layer
b) Network layer
c) Transport layer
d) Application layer
a) Physical layer
b) Network layer
c) Transport layer
d) Application layer
Answer: c
Explanation: Transport layer is responsible for process-to-process delivery.
Explanation: Transport layer is responsible for process-to-process delivery.
2. In process-to-process delivery,
two processes communicate in which of the following methods?
a) Client/Server
b) Source/Destination
c) Message Transfer
d) None of the mentioned
a) Client/Server
b) Source/Destination
c) Message Transfer
d) None of the mentioned
Answer: a
Explanation: The most common method used for this communication is Client/Server.
Explanation: The most common method used for this communication is Client/Server.
3. Multiple processes on
destinations at transport layer are identified by:
a) Mac address
b) Port number
c) Host number
d) Host address
a) Mac address
b) Port number
c) Host number
d) Host address
Answer: b
Explanation: Multiple processes on destinations are identified by transport layer address also called as port number.
Explanation: Multiple processes on destinations are identified by transport layer address also called as port number.
4. Range of port numbers in Internet
model is
a) 0 and 32,765(8-bit)
b) 0 and 32,765(16-bit)
c) 0 and 65,535(32-bit)
d) 0 and 65,535(16-bit)
a) 0 and 32,765(8-bit)
b) 0 and 32,765(16-bit)
c) 0 and 65,535(32-bit)
d) 0 and 65,535(16-bit)
Answer: d
Explanation: Port numbers are 16-bit integers between 0 and 65,535.
Explanation: Port numbers are 16-bit integers between 0 and 65,535.
5. According to Internet Assigned
Numbers Authority(IANA), which of the following range is not a part of port
number?
a) Well-known ports
b) Registered ports
c) Dynamic ports
d) Static ports
a) Well-known ports
b) Registered ports
c) Dynamic ports
d) Static ports
Answer: d
Explanation: IANA divided port number range in to three i.e., Well-known, Registered and Dynamic ports.
Explanation: IANA divided port number range in to three i.e., Well-known, Registered and Dynamic ports.
6. The combination of an IP address
and port number is called as?
a) Socket address
b) Port address
c) MAC address
d) Host address
a) Socket address
b) Port address
c) MAC address
d) Host address
Answer: a
Explanation: Socket address is the combination of an IP address and port number.
Explanation: Socket address is the combination of an IP address and port number.
7. Which of the following is false
with respect to Connectionless service of transport layer protocol?
a) Packets are not numbered
b) Packets are not delayed
c) No acknowledgement
d) Packet may arrive out of sequence
a) Packets are not numbered
b) Packets are not delayed
c) No acknowledgement
d) Packet may arrive out of sequence
Answer: b
Explanation: Packets in this method may be delayed or lost.
Explanation: Packets in this method may be delayed or lost.
8. Correct order in the process of
Connection-Oriented services is
1. Data transfer
2. Connection release
3. Connection establishment
a) 1-2-3
b) 3-2-1
c) 2-1-3
d) 3-1-2
1. Data transfer
2. Connection release
3. Connection establishment
a) 1-2-3
b) 3-2-1
c) 2-1-3
d) 3-1-2
Answer: d
Explanation: First connection should be established followed by data transfer and connection release.
Explanation: First connection should be established followed by data transfer and connection release.
9. In transport layer, Multiplexing
is done at
a) Channel
b) Receiver site
c) Sender site
d) Packet
a) Channel
b) Receiver site
c) Sender site
d) Packet
Answer: c
Explanation: Multiplexing is done before sending packets at sender site.
Explanation: Multiplexing is done before sending packets at sender site.
10. The process of error checking
and dropping of the header, delivering messages to appropriate process based on
port number is called as
a) Delivery of packets
b) Error correction
c) Multiplexing
d) Demultiplexing
a) Delivery of packets
b) Error correction
c) Multiplexing
d) Demultiplexing
Answer: d
Explanation: Demultiplexing is the process of error checking and dropping of the header, delivering messages to appropriate process based on port number.
Explanation: Demultiplexing is the process of error checking and dropping of the header, delivering messages to appropriate process based on port number.
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