Computer Networks Quiz

Buffering is….

• the process of temporarily storing the data to allow for small variation in device speeds.

• a method to reduce cross-talks

• storage of data within the transmitting medium until the receiver is ready to receive

• a method to reduce the routing overhead

What is the main difference between synchronous and asynchronous transmission?

• band width required is different.

• pulse height is different.

• clocking is derived from the data in synchronous transmission.

• clocking is mixed with data in asynchronous transmission.

how many bits per symbol are used in the Baudot code?

• 5

• 7

• 8

• 9

Which of the following transmission systems provides the highest data rate to an individual device?

• Digital PBX

• Computer Bus

• LAN

• Voiceband modem

One important characteristic of LAN is…

• parallel transmission

• low cast access for low bandwidth channel

• unlimited expansion

• application independent interfaces

How many OSI layers are covered in the X.25 standard?

• three

• four

• two

• seven

A protocol is a rule governing a time sequence of events that must take place.

• between peers

• across an interface

• between non-peers

• none of these

Layer one of the OSI model is…….

• physical layer

• link layer

• transport layer

• network layer

Protocol converters are ……

• same as multiplexers

• same as TDMs

• usually not operated in pairs

• usually operated in pairs

In OSI network architecture, the routing is performed by ….

• a data link layer

• network layer

• transport layer

• session layer