Module 4 Check Understanding

Question 1

True or false? The physical layer is only concerned with wired network connections.

Answer 1

False.

Question 2

True or false? When a frame is encoded by the physical layer, all bits are sent over the media at the same time.

Answer 2

False.

Question 3

The physical layer of the receiving device passes bits up to which higher level layer?

Answer 3

data link

Question 4

What PDU is received by the physical layer for encoding and transmission?

Answer 4

frame

Question 5

Which media uses patterns of microwaves to represent bits?

Answer 5

Wireless

Question 6

which media uses patterns of lights to represent bits?

Answer 6

fiber-optic

Question 7

which media uses electrical pulses to represent bits?

Answer 7

copper

Question 8

Name for capacity of a medium to carry data?

Answer 8

bandwidth.

Question 9

name for the measure of the transfer of bits across the media?

Answer 9

throughput.

Question 10

Which cable attaches antennas to wireless devices? Can also be bundled with fiber-optic cabling for two-way data transmission.

Answer 10

coaxial.

Question 11

Which cable counters EMI And RFI using shielding techniques and special connectors?

Answer 11

STP

Question 12

Which cable terminates with BNC, N type and F type connectors?

Answer 12

coaxial.

Question 13

which fiber optic cable types can help data travel app. 500 meters?

Answer 13

multimode

Question 14

Which fiber optic cable types use light emitting diodes (LEDs) as a data light source transmitter.

Answer 14

multimode

Question 15

Which fiber optic cable types use lasers in a single stream as a data light source transmitter?

Answer 15

single-mode

Question 16

Which fiber optic cable types is used to connect long-distance telephony and cable TV Applications?

Answer 16

single-mode

Question 17

Which fiber optic cable types can travel app. 100 km?

Answer 17

single-mode

Question 18

Which fiber optic cable type is used within a campus network?

Answer 18

multimode

Question 19

True or False. Wireless is not well suited for enterprise networks.

Answer 19

false.

Question 20

True or False.
Wireless LANs operate in full-duplex allowing all devices to send or receive data at the same time so the number of users does not impact performance.

Answer 20

false.

Question 21

Which wireless standard best suited for industrial and IoT envrionments?

Answer 21

Zigbee.

Question 22

Which wireless standard is used for Personal area network (PANs) and allows devices to communicate over distances of 1 to 100 meters?

Answer 22

Bluetooth