Computer Networks Questions & Answers – Reference
Models –2
1. OSI stands for
a) open system interconnection
b) operating system interface
c) optical service implementation
d) none of the mentioned
a) open system interconnection
b) operating system interface
c) optical service implementation
d) none of the mentioned
Answer: a
Explanation: OSI is the abbreviation for Open System Interconnection. OSI model provides a structured plan on how applications communicate over a network, which also helps us to have a structured plan for troubleshooting.
Explanation: OSI is the abbreviation for Open System Interconnection. OSI model provides a structured plan on how applications communicate over a network, which also helps us to have a structured plan for troubleshooting.
2. The OSI model has _______ layers.
a) 4
b) 5
c) 6
d) 7
a) 4
b) 5
c) 6
d) 7
Answer: d
Explanation: In OSI reference model, there are 7 layers namely Application, Presentation, Session, Transport, Network, Data Link and Physical layer.
Explanation: In OSI reference model, there are 7 layers namely Application, Presentation, Session, Transport, Network, Data Link and Physical layer.
3. TCP/IP model does not have ______
layer but OSI model have this layer.
a) session layer
b) transport layer
c) application layer
d) None of the mentioned
a) session layer
b) transport layer
c) application layer
d) None of the mentioned
Answer: a
Explanation: In OSI reference model, there are two layers which are not present in TCP/IP model. They are Presentation and Session layer.
Explanation: In OSI reference model, there are two layers which are not present in TCP/IP model. They are Presentation and Session layer.
4. Which layer links the network
support layers and user support layers
a) session layer
b) data link layer
c) transport layer
d) network layer
a) session layer
b) data link layer
c) transport layer
d) network layer
Answer: c
Explanation: Physical, data link and network layers are network support layers and session, presentation and application layers are user support layers.
Explanation: Physical, data link and network layers are network support layers and session, presentation and application layers are user support layers.
5. Which address is used in an
internet employing the TCP/IP protocols?
a) physical address and logical address
b) port address
c) specific address
d) all of the mentioned
a) physical address and logical address
b) port address
c) specific address
d) all of the mentioned
Answer: d
Explanation: All of the mentioned above addresses are used in TCP/IP protocol. All the addressing scheme, that is physical (MAC) and logical address, port address and specific address are employed in both TCP/IP model and OSI model.
Explanation: All of the mentioned above addresses are used in TCP/IP protocol. All the addressing scheme, that is physical (MAC) and logical address, port address and specific address are employed in both TCP/IP model and OSI model.
6. TCP/IP model was developed _____
the OSI model.
a) prior to
b) after
c) simultaneous to
d) none of the mentioned
a) prior to
b) after
c) simultaneous to
d) none of the mentioned
Answer: a
Explanation: Several TCP/IP prototypes were developed at multiple research centers between 1978 and 1983, whereas OSI reference model was developed in the year 1984.
Explanation: Several TCP/IP prototypes were developed at multiple research centers between 1978 and 1983, whereas OSI reference model was developed in the year 1984.
7. Which layer is responsible for
process to process delivery?
a) network layer
b) transport layer
c) session layer
d) data link layer
a) network layer
b) transport layer
c) session layer
d) data link layer
Answer: b
Explanation: The role of Transport layer (Layer 4) is to establish a logical end to end connection between two system in a network. The protocols used in Transport layer is TCP and UDP.
Explanation: The role of Transport layer (Layer 4) is to establish a logical end to end connection between two system in a network. The protocols used in Transport layer is TCP and UDP.
8. Which address identifies a
process on a host?
a) physical address
b) logical address
c) port address
d) specific address
a) physical address
b) logical address
c) port address
d) specific address
Answer: c
Explanation: A port number is a way to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server.
Explanation: A port number is a way to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server.
9. Which layer provides the services
to user?
a) application layer
b) session layer
c) presentation layer
d) none of the mentioned
a) application layer
b) session layer
c) presentation layer
d) none of the mentioned
Answer: a
Explanation: In networking, a user mainly interacts with application layer to create and send information to other computer or network.
Explanation: In networking, a user mainly interacts with application layer to create and send information to other computer or network.
10. Transmission data rate is
decided by
a) network layer
b) physical layer
c) data link layer
d) transport layer
a) network layer
b) physical layer
c) data link layer
d) transport layer
Answer: b
Explanation: Physical layer is a layer 1 device which deals with network cables or the standards in use like connectors, pins, electric current used etc. Basically the transmission speed is determined by the cables and connectors used. Hence it is physical layer that determines the transmission speed in network.
Explanation: Physical layer is a layer 1 device which deals with network cables or the standards in use like connectors, pins, electric current used etc. Basically the transmission speed is determined by the cables and connectors used. Hence it is physical layer that determines the transmission speed in network.
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