141. In Token Ring, when a frame reaches its destination station, then
A. message is copied
B. four bits in the packet are changed
C. message is taken of the ring and replaced by the token
D. both (a) and (b)

142. Which of the following is not a transceiver function?
A. Transmission and receipt of data
B. Checking of line voltages
C. Addition and subtraction of headers
D. Collision detection

143. The station-to-hub distance in which of the following is 2000 meters ?
A. 100 Base-TX
B. 100 Base-FX
C. 100 Base – T4
D. 100 Base – T1

144. Ether LAN uses
A. polar encoding
B. differential manchester encoding
C. manchester encoding
D. NRZ

145. Which of the given below houses the switches in Token Ring ?
A. NIC
B. MAU
C. Nine-pin connector
D. Transceiver

146. Which of the following uses an 8B/6T encoding scheme?
A. 100 Base-TX
B. 100 Base-FX
C. 100 Base-T4
D. 100 Base-T1

147. IBM’s Token-Ring network uses
A. adaptive routing
B. source routing
C. alternative routing
D. spanned tree routing

148. In which circuit switching, delivery of data is delayed because data must be stored and retrieved from RAM
A. space-division
B. time-division
C. virtual
D. packet

149. If a network designer wants to connect 5 routers as point-to-point simplex line, then total number of lines required would be
A. 5
B. 10
C. 20
D. 32

150. To interface a computer terminal with a modem, required physical layer standard is
A. RS 424 – A
B. RS 232 – C
C. RS 449
D. Either (b) or (c)