Multiple Choice Questions & Answers on OSI Model & TCP/IP | Page-3

11 Encryption and decryption are functions of
A Transport layer
B Session layer
C Presentation layer
D None of the above

Answer: Option [C]
12 Which of the following layers of the OSI reference model is concerned with the syntax of data exchanged between application entities ?
A Presentation layer
B Application layer
C Transportation layer
D Session layer

Answer: Option [A]
13 Function of transport layer in OSI-reference model is
A Error free transmission
B To ensure and cost defective delivery of data
C To check the routing and congestion control
D None of the above

Answer: Option [B]
14 Flow control in OSI models is done by
A Data link layer
B Network layer
C Transport layer
D Both data link and transport layers

Answer: Option [A]
15 Subnet usually comprises
A Layer 1 and 2
B Layer 1 through 3
C All layers
D None of the above

Answer: Option [D]

Subnet usually comprises the network layer. The Network layer is also known as the communication subnet layer which controls operation of subnets by determining how data packets are to be distributed/routed between the networks (subnets).