CCNA V3.1
Semestre 1 - Module 3

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1 Which combinations of charges will be repelled by electric force? (Choose two.)

neutral and neutral

neutral and positive

neutral and negative

*positive and positive

positive and negative

*negative and negative

2 Select the characteristics specified by 10BaseT. (Choose three.)

*twisted pair cable

T style connectors

*baseband transmission

10 gigabits per second data rate

*10 megabits per second data rate

decimal encoded data transmission

3 Which of the following are benefits of coaxial cable within a LAN environment? (Choose two.)

easier to install than UTP

* less expensive than fiber

*requires fewer repeaters than UTP

easily accommodates additions to network

faster transport speeds than fiber

4 Which of the following wireless standards increased transmission capabilities to 11 Mbps?

802.11a

*802.11b

802.11c

802.11d

5 When working with computer circuitry, what should technicians try to avoid?

electrical switch direction

electrostatic switch detector

electronic storage device

electronic series direction

*electrostatic discharge

6 What occurs when a voltage source is connected to a completed electrical circuit?

current will decrease in the circuit

resistance will increase in the circuit

resistance will decrease in the circuit

electrons will flow from the positive to the negative terminals

*electrons will flow from the negative terminal to the positive terminal

7 How is the current determined if the voltage and resistance of an electrical circuit are known?

Add the voltage and resistance.

*Divide the voltage by the resistance.

Divide the resistance by the voltage.

Multiply the voltage by the resistance.

Subtract the resistance from the voltage.

This problem cannot be solved with the given information.

8 What is the unit of measurement for electrical current?

volt

ohm

*ampere

watt

kilowatt

9 Which of the following is one of the biggest sources of connection problems in coaxial cable installations?

core conductor defects

*poor shield connections

poor core conductor connections

poor "T" connectors

open circuits

10 Which of the following materials severely restrict the flow of electrons?

conductors

ion solutions

semiconductors

*insulators

silicon based materials

carbon objects

11 What does UTP cable rely on to reduce signal degradation caused by EMI and RFI?

shielding

magnetism

*cancellation

insulation

properly grounded connections

RJ-45 connectors

12 Which cable connectors are used to connect a cable from a router's console port to a PC? (Choose two.)

RJ-11

RJ-12

*RJ-45

DB-8

*DB-9

DB-10

13 What is the maximum transmission rate of a device compliant with the basic 802.11a standard?

27 Mbps

*54 Mbps

81 Mbps

108 Mbps

14 Which of the following terms refers to electrical pressure?

ampere

*voltage

wattage

impedance

resistance

15 What is the most important property of the class of materials known as semiconductors?

A semiconductor has many free electrons.

A semiconductor is the best conductor of electricity.

A semiconductor has the ability to prevent the flow of free electrons.

*A semiconductor has the ability to precisely control the flow of electrons.

A semiconductor can change from insulator to resistor.

16 Which type of cable has the color of the wires in pins #1 and #2 on one end appear on the other end at pins #3 and #6, and vice-versa?

rollover cable

straight-through cable

*crossover cable

console cable

hub connector cable

17 Which adapter is used to connect a cable from the console port of the router to a PC?

RJ-11 to DB-9

RJ-11 to RJ-45

RJ-12 to RJ-11

*RJ-45 to DB-9

RJ-45 to RJ-45

DB-9 to DB-9

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