In RS232 protocol, output signal level usually swings between----------- voltage levels

• 3 V and -3V

• +12 V and -12 V

• +5 V and -5V

• 1 V and -1 V

RS485 protocol  has a maximum data rate of ------

• 1000 Kbps

• 1 Kbps

• 10 Kbps

• 100 Kbps

-------------is a phenomenon in synchronous circuits in which the clock signal sent from the clock circuit arrives at different components at different times

• crosstalk

• Clock error

• Phase error

• Clock Skew

RS-422 can support data transmission over cable lengths of up to -----meters

• 2400

• 1,200

• 100

• 4800

RS-485 is based on a -----------------architecture

• Multi- slave

• Multi-master

• Peer-peer

• master-slave

RS-485  uses a ------------- signalling  technique

• out-of-band

• balanced differential

• unbalanced differential

• In-band

Synchronous transmissions use an external -------------for synchronization

• control

• symbols

• pin

• clock

The advantage of synchronous data transfer over asynchronous data transfer is the -----------------

• Less hardware

• Less expensive

• Less complex

• Lower overhead

Hardware handshaking in RS-232C uses two signals-----

• CTS,RTS

• RXD,TXD

• EN,SHDN

• XON/XOFF

Shutdown signal in RS-232C transmitters reduces current consumption by -----

• 1 uA

• 1 uA

• 1 mA

• 10 mA