Data Communication and Networks

What is data communication?

• Transfer of data from one point to the next.

• Transfer of electronic data from one point to the next over a communication medium.

• sending information

• none of the above

Types of communication media

• Twisted and coaxial cables

• duplex

• Bluetooth

• wired and wireless

collection of two or more computers joined together through communication media, to share information is?

• Computer network

• Wired network

• half duplex

• full duplex

Which network connects computers within a large geographical area?

• Wide Area Network

• Local Area Network

• Metropolitan Area Network

• None of the above

Name the image shown.

• network

• bus topology

• ring topology

• star topology

Full Duplex data flow means:

• data travels in both directions, but only one direction at a time.

• data travels in only one direction.

• - data travels in both directions at the same time.

• data does not travel.

The number of layers in ISO OSI reference model is __________

• a) 5

• b) 7

• c) 6

• d) 10

The functionalities of the presentation layer include ____________

• a) Data compression

• b) Data encryption

• c) Data description

• d) All of the mentioned

Delimiting and synchronization of data exchange is provided by __________

• a) Application layer

• b) Session layer

• c) Transport layer

• d) Link layer

In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________

• a) Application layer

• b) Transport layer

• c) Link layer

• d) Session layer