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Networking > Module 4 Practice > Flashcards

Module 4 Practice Flashcards

1
Q

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

A

False

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2
Q

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

A

False

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3
Q

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

A

data link

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3
Q

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

A

frame

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4
Q

Which media uses patterns of microwaves to represent bits?

A

wireless

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5
Q

Which media uses patterns of light to represent bits?

A

fiber-optic

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6
Q

Which media uses electrical pulses to represent bits?

A

copper

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7
Q

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

A

throughput

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7
Q

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

A

bandwidth

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8
Q

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

A

coaxial

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9
Q

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

A

STP

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10
Q

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

A

multimode

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10
Q

Which of the following is the most common network media?

A

UTP

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11
Q

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

A

coaxial

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12
Q

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

A

multimode

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13
Q

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

A

single-mode

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13
Q

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

A

single-mode

14
Q

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

A

single-mode

15
Q

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

A

false

16
Q

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

A

multimode

17
Q

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.

A

false

18
Q

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

A

Zigbee

19
Q

Which standards organization oversees development of wireless LAN standards?

A

IEEE

20
Q

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?

A

Bluetooth

21
Q

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?

A

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

22
Q

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?

A

physical layer

23
Q

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

A

rollover

23
Q

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

A

straight-through

24
Q

Which statement correctly describes frame encoding?

A

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

25
Q

What is the definition of bandwidth?

A

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

26
Q

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.)

A
  • the microwave oven
  • the cellular phones that are used by the employees
26
Q

What is a characteristic of UTP cabling?

A

cancellation

27
Q

What is indicated by the term throughput?

A

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

28
Q

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

A

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

29
Q

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

A

They allow for full-duplex connectivity.

29
Q

What is the purpose of the OSI physical layer?

A

transmitting bits across the local media

30
Q

Which characteristic describes crosstalk?

A

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

31
Q

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

A

twisting opposing circuit wire pairs together

32
Q

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

A

They vary depending on protocols.

33
Q

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

A
  • how the connection between nodes appears to the data link layer
  • how nodes share the media
34
Q

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

A

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

Networking (16 decks)

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