FUNCTIONS OF LAYERS & DATA LINK LAYER

OSI stands for __________

• a) operating system interface

• b) open system interconnection

• c) optical service implementation

• d) open service Internet

Which of the following tasks is not done by data link layer?

• a) framing

• b) error control

• c) flow control

• d) channel coding

TCP/IP model does not have ______ layer but OSI model have this layer.

• a) session layer

• b) transport layer

• c) application layer

• d) network layer

Which layer is used to link the network support layers and user support layers?

• a) session layer

• b) data link layer

• c) transport layer

• d) network layer

Which sublayer of the data link layer performs data link functions that depend upon the type of medium?

• a) logical link control sublayer

• b) media access control sublayer

• c) network interface control sublayer

• d) error control sublayer

Which layer is responsible for process to process delivery in a general network model?

• a) network layer

• b) transport layer

• c) session layer

• d) data link layer

Which among the following represents the objectives/requirements of Data Link Layer?

• a. Frame Synchronization

• b. Error & Flow Control

• c. Both a & b

• d. None of the above

Transmission data rate is decided by ____________

• a) network layer

• b) physical layer

• c) data link layer

• d) transport layer

Which address is used to identify a process on a host by the transport layer?

• a) physical address

• b) logical address

• c) port address

• d) specific address

When does the station B send a positive acknowledgement (ACK) to station A in Stop and Wait protocol?

• a. only when no error occurs at the transmission level

• b. when retransmission of old packet in a novel frame is necessary

• c. only when station B receives frame with errors

• d. all of the above