CS601 Final Term Subjective by A and I

Short Question

Q1. What are the advantages of a multipoint connection over a point-to-point connection?

Answer: Point-to-point connection is limited to two devices, where else more than two devices share a single link in multipoint connection. Multipoint connection can be used for fail-over and reliability.

Q2. Answer:

DSS (digital data service) is the telephone service in which there is no need of dialing.

Q4. Which type of frames is present in BSC frames?

Answer

There are two types of frames that are present in BSC.

1. Control Frames and
2. Data Frames

Q5. What methods of line discipline are used for peer to peer and primary secondary communication?

Answer: Line discipline is done in two ways:

1. ENQ/ACK (Enquiry Acknowledgement)

This is used for peer to peer communication.

2. Poll/ Select

This method is used for primary secondary communication.

Q6. What are properties of signals?

Answer: Capable of being propagated over TX. Medium ,Interpretable as data at the Receiver

Q7. Whether in Asynchronous or Synchronous TDM, addressing is used?

Answer: Addressing is used only in Asynchronous TDM.

Q8. What is the basic purpose of Router?

Answer: Basic purpose of Router: A router is a device that extracts the destination of a packet it receives, selects the best path to that destination, and forwards data packets to the next device along this path. They connect networks together; a LAN to a WAN for example, to access the Internet.

Q9. Why we need a Null Modem?

Answer: A null modem provide DTA –DTE interface w/o DCEs

Q10. What are the categories of multiplexing?

Answer: There are three catogaries of multiplxing FDM TDM Have a two other catagories Synchronous and asyrouncN WDM