Please attempt these questions
before you move to the next section.

 

Q1 What is the name of the computer card that we use to connect the computer to the local area network?

  1. NIC
  2. CODEC
  3. SCSI
  4. HUB
ABCD

Q2 Which statement most correctly describes the components of a local area network?
  1. Computers, VGA cards, VGA cables and a monitor
  2. LPT1 port, parallel cable and printer
  3. Adaptec SCSI card, SCSI cables and external high speed HDD's
  4. Computers, NIC's, LAN Software, patch cords, Cat 5 cables and a HUB
ABCD

Q3 What is the difference between analog and digital signals?
  1. Analog signals are continually varying and digital signals have unique states
  2. Analog signals have discrete states while digital signals are continually varying
  3. Digital signals are unique and analog signals are discrete
  4. Analog signals use sine waves and digital signals do not
ABCD

Q4 What do we mean when we say "Serial Transmission" of data?
  1. sending data on many wires in parallel
  2. sending data in a synchronous manner
  3. sending data in an asynchronous manner
  4. sending each bit one at a time over one pathway
ABCD

Q5 Which statement about "Parallel Transmission" is true?
  1. you need 3 wires, TX, RX and reference earth, i.e. DB9 connector
  2. you need 6 balanced wires, 2 for TX, 2 for RX, 2 for clock i.e. DIN connector
  3. you need a fiber optic cable with two fibers, i.e. 2 ST connectors
  4. you need many wires each carrying data i.e.DB25 connector
ABCD

Q6 Finish this sentence. Synchronous networks are...?
  1. networks that derive the clock from each computer
  2. networks where each computer is served with a common clock source
  3. local area networks that operate from any clock source
  4. local area networks that do not need a common clock source
ABCD

Q7 A local area network that send data intermittently and sends clock with the data in bursts may be classified as ....?
  1. obnoxious
  2. plesiochronous
  3. synchronous
  4. asynchronous
ABCD

Q8 What is the simple formulae for Impedance?
  1. R2xI=P
  2. R+L+C=Z
  3. IxR=V
  4. 10LogP1/P2=dB
ABCD

Q9 Your computer's modem transfers data over the telephone line. How does the data get transferred?
  1. using short bursts on data bits, of 1 Volt each
  2. using a modulated carrier
  3. by using special combinations of DTMF signalling
  4. by sending a pure RF carrier over the phone line
ABCD