CCNA module 3

Question 1

The basic unit of all
matter is

Answer 1

an atom

Question 2

particles of an atom

Answer 2

Protons– particles that
have positive charge–Neutrons– particles that
have no charge (neutral)– Electrons– particles that
have negative charge and
orbit the nucleus

Question 3

particles that
have positive charge

Answer 3

protons

Question 4

particles that
have no charge (neutral)

Answer 4

neutrons

Question 5

particles that
have negative charge and
orbit the nucleus

Answer 5

electrons

Question 6

though usually
harmless to people, can
create serious problems for
sensitive electronic
equipment

Answer 6

Electrostatic discharge
(ESD).

Question 7

Electrical current flows in both directions; positive and
negative terminals continuously trade places (polarity).

Answer 7

Alternating Current (AC)

Question 8

– Electrical current flows in one direction; negative to
positive.

Answer 8

Direct Current (DC):

Question 9

property of a material that opposes the electrical flow.

Answer 9

Resistance:

Question 10

total opposition to the current.

Answer 10

Impedance:

Question 11

Force or pressure caused by the separation of
electrons and protons.

Answer 11

voltage

Question 12

Graphs voltage over time

Answer 12

Oscilloscope

Question 13

can refer to
the place on the
earth.

Answer 13

Ground

Question 14

can also
mean the reference
point, or the 0 volts
level, when making
electrical
measurements

Answer 14

Ground

Question 15

The type of connector most commonly used
with multimode fiber is the

Answer 15

Subscriber
Connector (SC connector)

Question 16

On single-mode
fiber, the —— is
frequently used.

Answer 16

Straight Tip (ST) connector

Question 17

Two of the most important testing instruments for signal power loss are

Answer 17

Optical Loss Meters and Optical Time Domain
Reflectometers (OTDRs).

Question 18

A wireless network may
consist of as few as

Answer 18

two
devices.

Question 19

Devices in WLAN are

Answer 19

peers

Question 20

is
commonly installed to
act as a central hub for
the WLAN

Answer 20

An access point (AP)

Question 21

Performance of the
network will also be
affected by signal
strength and degradation
in signal quality due to
distance or interference.

Answer 21

Adaptive Rate Selection

Question 22

IEEE 802.11 lists two types of authentication
processes.

Answer 22

Open system – only the SSID must match– Shared key – requires Wireless Equivalency Protocol (WEP)

Question 23

only the SSID must match

Answer 23

Open system –

Question 24

requires Wireless Equivalency Protocol (WEP)

Answer 24

Shared key –

Question 25

Wireless Security

Answer 25

• VPN
• EAP-MD5 Challenge
• LEAP (Cisco)
• User authentication
• Encryption
• Data authentication