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Network+ > Ch. 15 Packet > Flashcards

Ch. 15 Packet Flashcards

1
Q

Which standard is the common wireless networking standard?

A

IEEE 802.11

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2
Q

Which term represents the condition of whether a wireless device is connected?

A

Link state

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3
Q

Which term represents a measurement of how well a wireless device is connecting to other devices?

A

Signal strength

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4
Q

Which wireless network mode operates by allowing two or more PCs to communicate directly with-out cabling or any other intermediary hardware?

A

Ad hoc

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5
Q

What type of unit is formed by two or more wireless nodes communicating in ad hoc mode?

A

Independent Basic Service Set (IBSS)

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6
Q

What type of unit is formed by a single WAP servicing a given area?

A

Basic Service Set (BSS)

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7
Q

What type of unit is formed by a single wireless access point servicing a given area that has been extended by adding more access points?

A

Extended Service Set (ESS)

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8
Q

Which term defines the most basic infrastructure mode network – a BSS of one WAP and one or more wireless nodes?

A

Basic Service Set Identifier (BSSID)

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9
Q

What is used as the Basic Service Set Identifier (BSSID) for a Basic Service Set (BSS)?

A

The MAC address of the WAP

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10
Q

What do wireless nodes in an Independent Basic Service Set (IBSS) use in place of the Basic Ser-vice Set Identifier (BSSID value in each frame?

A

A randomly generated value

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11
Q

Which term did Wi-Fi people create to use as another level of naming to describe a standard name applied to the BSS or IBSS to help the connection happen?

A

Service Set Identifier (SSID)

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12
Q

Which spread-spectrum broadcasting method sends data out on different frequencies at the same time?

A

DSSS

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13
Q

Which term describes a portion of the available spectrum available for Wi-Fi network communication?

A

Channel

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14
Q

How many channels were defined by the 802.11 standard?

A

14

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15
Q

Which of the channels defined by the 802.11 standard may be used by a WAP using the 2.4-GHz band in the United States?

A

1 through 11

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16
Q

__________ broadcasts data in small, discrete chunks over the different frequencies available within a certain frequency range.

A

Spread-spectrum

17
Q

Which 802.11 collision avoidance method is currently implemented?

A

Distributed Coordination Function (DCF)

18
Q

What happens when frames are transmitted on the network from two different devices at the same time, corrupting each other’s signals?

A

A collision occurs.

19
Q

Which term describes the predetermined silence period that is added to the length of a packet to determine the waiting period for a network device after it has detected traffic on the media?

A

Interframe gap

20
Q

Which Wi-Fi standard offers speeds of up to 54 Mbps, a range of up to about 300 feet, operates in the 2.4 GHz frequency, and is backward-compatible with an earlier, popular Wi-Fi standard?

A

802.11g

21
Q

Which Wi-Fi standard offers speeds of up to 100 Mbps (or higher), a range of up to about 300 feet, and operates in the 2.4-GHz and 5.0-GHz frequencies?

A

802.11n

22
Q

Which term describes a method that enables an administrator to limit access to a network based on the physical addresses of wireless NICs?

A

MAC address filtering

23
Q

Which standard includes secure authentication using a RADIUS server and password encryption using EAP?

A

IEEE 802.1X

24
Q

Which statement describes a weakness in WEP that allows it to be easily cracked?

A

The size of the encryption key

25
Q

Which key sizes does WEP use?

A

40 bits and 104 bits

26
Q

Which term describes a graphical representation of the radio frequency (RF) sources on a site?

A

Heat map

27
Q

What is the gain of the typical WAP antenna?

A

2 dB

28
Q

Which settings should be modified when there are overlapping Wi-Fi signals?

A

Channel and frequency

29
Q

Which wireless bridge can talk to more than one other bridge at a time and can connect multiple network segments?

A

Point-to-multipoint

30
Q

Which wireless bridge can only communicate with a single other bridge and are used to connect two wireless network segments?

A

Point-to-point

31
Q

One of the big challenges to larger enterprise networks are the large number of clients that might be on a single __________ at any given moment.

A

SSID

32
Q

A(n) __________ access point is simply an unauthorized access point (AP).

A

rogue

Network+ (9 decks)

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