Basic Computer Networks MCQ Question and Answer
Basic Computer Networks MCQ Question and Answer
181. Error detection at the data link level is achieved by
- bit stuffing
- cyclic redundancy codes
- Hamming codes
- equalization
182. Which of the following is a wrong example of a network layer ?
- Internet Protocol (IP)-ARPANET
- X.25 Packet Level Protocol (PLP)-ISO
- Source routing and domain naming-USENET
- X.25 Level 2-ISO
183. The topology with highest reliability is
- bus topology
- star topology
- ring topology
- mesh topology
184. baud means
- the number of bits transmitted per unit time
- the number of bytes transmitted per unit time
- the rate at which the signal changes
- none of the above
185. Start and stop bits are used in serial communication for
- error detection
- error correction
- synchronization
- slowing down the communication
186. Unmodulated signal coming from a transmitter is known as
- carrier signal
- baseband signal
- primary signal
- none of the above
187. Manchester code is a
- Bi-polar code
- non return to zero code
- polar code
- none of the above
188. Pick the incorrect statements.
- Another name for primary/secondary protocol is master/slave
- Peer to peer protocol provides equal status to all sites on the channel.
- Priority, non-priority types come under master/slave protocol
- TDM is a primary/secondary non-priority system.
189. Pick the correct statements.
- A switched circuit is a dial-up circuit that may encounter blockage (busy signal).
- Non switched leased line supports higher data volume and quality than switched lines.
- Non switched lines are expensive for high volume data
- Switched circuit provides faster response time.
190. Pick the incorrect statements that pertain to error retransmission used in continuous ARQ method.
- Go-back-N method required more storage at the receiving site
- Selective Repeat involves complex login than Go-bak-N.
- Go-back-N has better line utilisation
- Selective Repeat has better line utilisation