Module 4 Practice

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 3

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

Answer 3

frame

Question 4

Which media uses patterns of microwaves to represent bits?

Answer 4

wireless

Question 5

Which media uses patterns of light to represent bits?

Answer 5

fiber-optic

Question 6

Which media uses electrical pulses to represent bits?

Answer 6

copper

Question 7

Which of these is a measure of the transfer of bits across the media?

Answer 7

throughput

Question 7

Which of these is the name for the capacity of a medium to carry data?

Answer 7

bandwidth

Question 8

Which of the following attaches antennas to wireless devices? It can also be bundled with fiber-optic cabling for two-way data transmission.

Answer 8

coaxial

Question 9

Which of the following counters EMI and RFI by using shielding techniques and special connectors?

Answer 9

STP

Question 10

Which of the following fiber-optic cable types can help data travel approximately 500 meters?

Answer 10

multimode

Question 10

Which of the following is the most common network media?

Answer 10

UTP

Question 11

Which of the following terminates with BNC, N type and F type connectors?

Answer 11

coaxial

Question 12

Which of the following fiber-optic cable types use light emitting diodes (LEDs) as a data light source transmitter?

Answer 12

multimode

Question 13

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

Answer 13

single-mode

Question 13

Which of the following fiber-optic cable types can travel approximately 100 km?

Answer 13

single-mode

Question 14

Which of the following fiber-optic cable types is used to connect long-distance telephony and cable TV applications?

Answer 14

single-mode

Question 15

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

Answer 15

false

Question 16

Which of the following fiber-optic cable types is used within a campus network?

Answer 16

multimode

Question 17

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 17

false

Question 18

Which of the following wireless standards is best suited for industrial and IoT environments?

Answer 18

Zigbee

Question 19

Which standards organization oversees development of wireless LAN standards?

Answer 19

IEEE

Question 20

Which of the following wireless standards is used for Personal Area Networks (PANs) and allows devices to communicate over distances of 1 to 100 meters?

Answer 20

Bluetooth

Question 21

A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?

Answer 21

The end-user device needs mobility when connecting to the network.

Question 22

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

Answer 22

physical layer

Question 23

What type of cable is used to connect a workstation serial port to a Cisco router console port?

Answer 23

rollover

Question 23

Which type of UTP cable is used to connect a PC to a switch port?

Answer 23

straight-through

Question 24

Which statement correctly describes frame encoding?

Answer 24

It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.

Question 25

What is the definition of bandwidth?

Answer 25

the amount of data that can flow from one place to another in a given amount of time

Question 26

A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What are two possible causes of the signal distortion? (Choose two.)

Answer 26

- the microwave oven - the cellular phones that are used by the employees

Question 26

What is a characteristic of UTP cabling?

Answer 26

cancellation

Question 27

What is indicated by the term throughput?

Answer 27

the measure of the bits transferred across the media over a given period of time

Question 28

What is one advantage of using fiber optic cabling rather than copper cabling?

Answer 28

It is able to carry signals much farther than copper cabling.

Question 29

Why are two strands of fiber used for a single fiber optic connection?

Answer 29

They allow for full-duplex connectivity.

Question 29

What is the purpose of the OSI physical layer?

Answer 29

transmitting bits across the local media

Question 30

Which characteristic describes crosstalk?

Answer 30

the distortion of the transmitted messages from signals carried in adjacent wires

Question 31

Which procedure is used to reduce the effect of crosstalk in copper cables?

Answer 31

twisting opposing circuit wire pairs together

Question 32

Which statement describes a characteristic of the frame header fields of the data link layer?

Answer 32

They vary depending on protocols.

Question 33

Which two factors influence the method that is used for media access control? (Choose two.)

Answer 33

- how the connection between nodes appears to the data link layer - how nodes share the media

Question 34

What is a characteristic of a WAN hub-and-spoke topology?

Answer 34

The branch sites are connected to a central site through point-to-point links.