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CompTIA P1 Study Guide > Chapt 7 > Flashcards

Chapt 7 Flashcards

1
Q

Which of the following wireless IEEE standards operate on the 2.4 GHz radio frequency and are directly compatible with each other? (Choose two.)

802.11a, 802.11b, 802.11ac, 802.11g

A

802.11b and 802.11g

B, D. Both 802.11b and 802.11g operate in the 2.4 GHz range and use similar transmission standards. Some legacy devices are listed as 802.11b/g, meaning they will work with either system. Alternatively, 802.11a and 802.11ac operate in the 5 GHz range.

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2
Q

What is the primary function of the SSID?

A) To secure communication between a web server and a browser
B) To secure communication between a server and a remote host
C) To serve as a parameter used to identify a network and configure a wireless connection
D) To serve as a type of password used to secure a wireless connection

A

To serve as a parameter used to identify a network and configure a wireless connection.
A service‐set identifier (SSID) is the unique name given to the wireless network. All hardware that is to participate on the network must be configured to use the same SSID. Essentially, it is the network name. When you are using Windows to connect to a wireless network, all available wireless networks are listed by their SSID.

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3
Q

Which of the following are features that allow 802.11ac to achieve higher data throughput? (Choose two.)

MIMO, Beamforming, Channel bonding, Code division multiplexing

A

MIMO and Channel bonding
A, C. The two technologies that 802.11ac employs to achieve high throughput are channel bonding and MIMO. Channel bonding is the combination of multiple smaller channels into one large channel for greater bandwidth. MIMO is enhanced over 802.11n to allow for multiple inputs and outputs. 802.11ac also uses beamforming, but that helps the range, not the throughput.

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4
Q

Which of the following is the most secure wireless encryption standard for 802.11 networks?

WEP, WPA, WPA2, SAFER+

A

WPA2.
WEP was the original encryption standard developed for Wi‐Fi networks, but it is easily hacked. WPA is an upgrade, but WPA2 is more secure and incorporates the entire 802.11i standard. WPA3 is of course the safest, but it’s not one of the options. SAFER+ is used to encrypt Bluetooth communications.

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5
Q

You are upgrading a wireless network from Wi-Fi 5 over to Wi-Fi 6. Which of the following statements is not correct?

A) Users should get faster speeds.
B) Network range will be similar.
C) Fewer users will be able to use each access point.
D) Devices may have lower power usage while connecting to the network.

A

Fewer users will be able to use each access point..

Wi‐Fi 6 is faster than Wi‐Fi 5, and the network range is similar. More users should be able to access each access point, not fewer. Devices may have lower power usage in Wi‐Fi 6 due to a new sleep feature.

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6
Q

You have just installed a wireless router on your home network. Which of the following should you do to make it highly secure? (Choose all that apply.)

Change the default administrator name and password.
Change the SSID.
Enable WEP.
Configure it to channel 11.

A

Change the default administrator name and password.
Change the SSID.

You should always change the default administrator name and password as well as the default SSID when installing a new wireless router. Enabling encryption is also a good idea, but WPA, WPA2, and WPA3 are better options than WEP. The channel has nothing to do with security.

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7
Q

You are setting up a small office network for a client. Which Internet service would you recommend to provide the best speed?

DSL, Cable, Satellite, Fiber

A

Fiber.
Of the options listed, fiber provides the best speed. DSL and cable provide similar speeds but can’t match fiber. Satellite is the slowest of the options listed.

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8
Q

Which service allows users with private IP addresses to access the Internet using a public IP address?

DHCP, DNS, DSL, NAT

A

NAT.
Network Address Translation (NAT) allows users to have a private IP address and still access the Internet with a public IP address. NAT is installed on a router and translates the private IP address into a public address for the user to access the Internet. DHCP assigns IP configuration information to clients. DNS resolves hostnames to IP addresses. DSL is a type of broadband Internet access.

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9
Q

You are installing a single 802.11g wireless network. The office space is large enough that you need three WAPs. What channels should you configure the WAPs on to avoid communication issues?

2, 5, and 7
1, 8, and 14
1, 6, and 11
3, 6, and 9

A

1, 6, and 11.
There are 14 communication channels in the 2.4 GHz range, but only the first 11 are configurable. The three nonoverlapping channels are 1, 6, and 11.

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10
Q

You are setting up a wireless network. Which wireless standards would give the users over 40 Mbps throughput? (Choose all that apply.)

802.11ac, 802.11b, 802.11g, 802.11n

A

802.11ac, 802.11g, 802.11n

A, C, D. Three standards listed—802.11ac (1,300 Mbps), 802.11g (54 Mbps), and 802.11n (600 Mbps)—give users the required throughput. 802.11ax would do so as well, although it’s not an option.

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11
Q

You have been asked to configure a network for a small office. The wireless router is installed, and now you need to connect the client computers. What do you enter on the client computers to connect to the router?

The administrator password
The security passphrase
The client’s MAC address
The default router password

A

The security passphrase.
To join the network, client computers need to find the SSID, ensure that the security settings are correct (to match the router), and enter the security passphrase. As an administrator, you should have configured this passphrase to be different from the router’s administrator password.

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12
Q

Which of the following technologies can operate in the 125 kHz to 134 kHz range?

Bluetooth, RFID, NFC, LTE

A

RFID.
Radio frequency identification (RFID) can operate in three frequency bands: 125 kHz to 134 kHz, 13.56 MHz, or 856 MHz to 960 MHz. Bluetooth is 2.4 GHz, NFC is 13.56 MHz, and LTE is between 600 MHz and 6 GHz.

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13
Q

Due to channel interference, you are upgrading a wireless network from Wi-Fi 5 to Wi-Fi 6. Which feature of Wi-Fi 6 reduces channel interference?

OFDMA, BSS coloring, MU-MIMO, DFS

A

BSS coloring.
The feature of Wi‐Fi 6 that reduces channel interference is Basic Service Set (BSS) coloring, which adds a field to the wireless frame that distinguishes it from others. Orthogonal Frequency Division Multiple Access (OFDMA) is a modulation technique that improves speed because it allows transmission to multiple clients at once. MU‐MIMO also increases speed because in Wi‐Fi 6 it works for uplink connections as well as downlink ones. Dynamic Frequency Selection (DFS) was introduced with 802.11n, and it detects radar interference and adjusts frequencies accordingly.

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14
Q

Which of the following security standards was the first to introduce a dynamic 128-bit per-packet security key?

WEP, TKIP, AES, CCMP

A

TKIP.
WEP could use a 64‐bit or 128‐bit security key, but it was a static key. TKIP introduced a dynamic per‐packet key. AES and CCMP came after TKIP.

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15
Q

You are running an 802.11g wireless router in mixed mode. You have three 802.11g wireless NICs using the router. A new user connects using an 802.11b wireless NIC. What will happen?

A) The user with 802.11b will access the network at 11 Mbps, while the users with 802.11g will access the network at 54 Mbps.
B) The user with 802.11b will not be able to communicate on the network.
C) The user with 802.11b will access the network at 11 Mbps. The users with 802.11g will access the network at 54 Mbps, unless they are communicating with the 802.11b device, which will be at 11 Mbps.
D) All users will access the network at 11 Mbps.

A

All users will access the network at 11 Mbps.

The good news is that 802.11g is backward compatible with 802.11b. The bad news is, if you run in a mixed environment, all devices that communicate with the WAP (or router) will be forced to slow down to accommodate the older technology.

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16
Q

When enabled, which feature of a wireless router allows only specified computers to access the network?

Port forwarding, WPS, SSID, MAC filtering

A

MAC filtering.
MAC filtering is a security option that can specify that only computers with specific MAC (hardware) addresses can access the network. Port forwarding is a feature of firewalls. WPS is an easy setup mechanism for wireless networks. SSID is the wireless network name.

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17
Q

A firewall operates by using a set of rules known as what?

SLA, ACL, NAT, APIPA

A

ACL.
The set of rules for access on a firewall is called an access control list (ACL). An SLA is an agreement on service level for QoS. NAT translates private IP addresses into public ones. APIPA assigns an IP address to a client that can’t reach the DHCP server.

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18
Q

You have set up a wireless router on your network and configured it to use AES. What configuration option do you need to choose on the client computers?

WEP, WPA, WPA2, TKIP

A

WPA2.
If your router is using AES, the clients need to use WPA2. TKIP is a protocol utilized by WPA. WEP is the weakest of the encryption options.

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19
Q

Besides 802.11 standards, which wireless communication methods may also work in the 2.4 GHz range? (Choose all that apply.)

Bluetooth, Satellite, Long-range fixed wireless, mmWave, NFC

A

Bluetooth and Long-range fixed wireless.

Bluetooth also operates in the 2.4 GHz range, and long‐range fixed wireless can if it uses unlicensed frequencies. Satellite uses satellite waves; 5G cellular mmWave is between 24 GHz and 86 GHz, and NFC uses 13.56 MHz.

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20
Q

You are configuring a SOHO client to use TCP/IP. Which parameter is needed to tell the client where to communicate to get on the Internet?

Static address, Dynamic address, APIPA, Gateway

A

Gateway.
The gateway, also known as a default gateway, is the address to the router to take a client to the next network (or Internet). Gateways can be configured with a static assignment or dynamically through a DHCP server. APIPA will automatically configure a client with IP address information if it’s set to get its configuration from a DHCP server but none is available. APIPA‐configured clients can’t get on the Internet.

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21
Q

the wireless networking standard of 802.11a operates at a frequency of ____ and supports a speed of ____

A

5GHZ and 54Mbps

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22
Q

the wireless networking standard of 802.11n operates at a frequency of ____ and supports a speed of ____

A

2.4 and 5 GHz and up to 600Mbps

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23
Q

the wireless networking standard of 802.11b operates at a frequency of ____ and supports a speed of ____

A

2.4GHz and 11Mbps

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24
Q

the wireless networking standard of 802.11g operates at a frequency of ____ and supports a speed of ____

A

2.4GHz and 54Mbps

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25
Q

on a 2.4GHz wifi network, what are the three nonoverlapping channels

A

1, 6, 11

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26
Q

wireless 802.11b/g routers have a range of approximately _____ indoors and ____ outdoors

A

40m and 140m

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27
Q

a 10BaseT network uses _____ cabling and can transmit data at a speed of _____

A

twisted pair or UTP at 10Mbps

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28
Q

the four common types of broadband are ____

A

DSL, cable, satellite, and fiber optic

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29
Q

the most secure encryption protocol for 802.11 is ____

A

WPA3

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30
Q

wireless networks use ____ to identify themselves

A

SSID (service set identifiers)

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31
Q

two examples of 4G technology are ___

A

LTE (long term evolution) and
WiMAX (worldwide interoperability for microwave access)

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32
Q

firewalls filter packets based on a set of rules called a(n) ____

A

ACL (access control list)

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33
Q

UTP (unshielded twisted pair) cable has a maximum segment length of ___

A

100m

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34
Q

the method that translates between private and non-routable IP addresses and public IP addresses is ____

A

NAT (network address translation)

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35
Q

WPA2 (wifi protected access 2) employs what security method?

A

AES-CCMP (Advanced Encryption Standard Counter Mode with Cipher Block Chaining Message Authentication)

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36
Q

a firewall configuration where every computer is denied access except certain computers on a list is called a ____ list

A

white ( or allow)

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37
Q

cable TV and networking can use different types of ____ cable

A

coaxial

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38
Q

the oldest type of twisted pair cabling that can support speeds of 1 Gbps is ___

A

Cat5e

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39
Q

dial-up networking is limited to a speed of _____

A

56Kbps

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40
Q

another name for a hub on a wireless network is a _____

A

WAP (wireless access point)

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41
Q

to only allow access to certain computers on your wireless router, you can use ____ filtering.

A

MAC (media access control)

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42
Q

the T in 100BaseT refers to what?

A

twisted pair cabling

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43
Q

WPA (wifi protected access) employs what security method?

A

TKIP (temporal key integrity protocol)

44
Q

what technology is designed to be “plug and play” for network devices?

A

UPnP (universal plug and play)

45
Q

In order to connect to the wireless hub or router, the client needs to know the ____ of the network.

A

service-set identifier (SSID)

46
Q

802.11 networks use the ____ ____ ___ ___ ___ ___ access method

A

Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA)

47
Q

_____ is the audio range in which the technology broadcasts

A

Frequency

48
Q

______ are sub-divisions within a frequency.

A

channels

49
Q

_______, which refers to how the computer converts digital information into signals that can be transmitted over the air

A

modulation

50
Q

______ accomplishes communication by hopping the transmission over a range of predefined frequencies

FHSS, DSSS, OFDM

A

Frequency-hopping spread spectrum (FHSS)

51
Q

______ accomplishes communication by adding the data that is to be transmitted to a higher-speed transmission.

FHSS, DSSS, OFDM

A

Direct-sequence spread spectrum (DSSS)

52
Q

______ accomplishes communication by breaking the data into subsignals and transmitting them simultaneously

FHSS, DSSS, OFDM

A

Orthogonal frequency division multiplexing (OFDM)

53
Q

The 802.11a standard provides WLAN bandwidth of up to ______ in the _____ frequency spectrum

A

54Mbps at 5GHz

54
Q

The 802.11b standard provides WLAN bandwidth of up to _____ in the _____ frequency spectrum

A

11Mbps at 2.4GHz

55
Q

The 802.11g standard provides WLAN bandwidth of up to _____ in the _____ frequency spectrum

A

54Mbps at 2.4GHz

56
Q

The 802.11n standard provides WLAN bandwidth of up to _____ in the _____ frequency spectrum

A

600Mbps at 2.4GHz and 5GHz

57
Q

______, which can allow for range increases by sending the wireless signal in the specific direction of the client, as opposed to broadcasting it omnidirectionally.

A

beamforming

58
Q

The 802.11ac standard provides WLAN bandwidth of up to _____ in the _____ frequency spectrum

A

6.9Gbps at 5GHz

59
Q

The 802.11ax standard provides WLAN bandwidth of up to _____ in the _____ frequency spectrum

A

9.6Gbps at 2.4GHz and 5GHz

60
Q

Bluetooth Class 1 has a range of _____ and uses ____ (units) of power

A

100m and 100mW

61
Q

Bluetooth Class 2 has a range of _____ and uses ____ (units) of power

A

10m and 2.5mW

62
Q

Bluetooth Class 3 has a range of _____ and uses ____ (units) of power

A

1m and 1mW

63
Q

Bluetooth Class 4 has a range of _____ and uses ____ (units) of power

A

0.5m and 0.5mW

64
Q

______ is a point-to-point technology that uses directional antennas to send and receive network signals.

A

Long-range fixed wireless

65
Q

An _____ system is made of three components: tag, reader, and antenna.

A

RFID

66
Q

near-field communication (NFC) is designed to facilitate information sharing and, in particular, contactless payment. It transmits at ______ frequency

A

13.56 MHz

67
Q

FTTH the cables are 100 percent fiber from their data centers to your home

A

fiber-to-the-home (FTTH)

68
Q

FTTC This runs fiber to the phone or cable company’s utility box near the street and then runs copper from there to your house.

A

fiber-to-the-curb (FTTC)

69
Q

FTTN the fiber runs only from their network to the junction box at the entrance to your neighborhood or possibly to your curb

A

fiber-to-the-node (FTTN)

70
Q

eMBB

A

Enhanced Mobile Broadband (eMBB)

71
Q

List the six different Internet connection types.

A

DSL, cable, fiber, satellite, cellular,
and wireless Internet service provider (WISP).

72
Q

Cat 5 - Standard - max speed - max distance

A

Cat 5
100BaseTX
100 Mbps
100 meters

73
Q

Cat 5e - Standard - max speed - max distance

A

Cat 5e
1000BaseT
1 Gbps
100 meters

74
Q

Cat 6 - Standard - max speed - max distance

A

Cat 6
10GBaseT
10 Gbps
55 meters

75
Q

Cat 6a - Standard - max speed - max distance

A

Cat 6a
10GBaseT
10 Gbps
100 meters

76
Q

Cat 3 - Standard - max speed - max distance

A

Cat 3
10BaseT
10 Mbps
100 meters (∼300 feet)

77
Q

Mulit Mode Fiber standard, max speed, max distance

A

10GBaseSR
10Gbps
300m

78
Q

Single Mode Fiber standard, max speed, max distance

A

10GBaseLR
10Gbps
10Km

79
Q

10GBaseER cable type, max speed, max distance

A

single mode fiber, 10Gbps, 40Km

80
Q

Instead of using switches and hubs, wireless networks use either a _____ or a _____ to provide central connectivity.

A

wireless access point (WAP) or a wireless router

81
Q

TKIP is associated with what wireless security standard?

A

WPA

82
Q

AES is associated with what wireless security standard?

A

WPA2

83
Q

There are ___ configurable channels in the 2.4 GHz range

A

11

84
Q

DMZs are also called ____ _____

A

screened subnets

85
Q

____ is a service that translates a private IP address on your internal network to a public IP address on the Internet.

A

Network Address Translation (NAT)

86
Q

Which of the following are features that allow 802.11ac to achieve greater range?

MIMO, Beamforming, Channel bonding, Code division multiplexing

A

Beamforming

87
Q

NFC operates on _____ MHz.

A

NFC uses 13.56 MHz.

88
Q

Ofdma was introduced with which 802.11 standard?

A) 802.11g
B) 802.11n
C) 802.11ac
D) 802.11ax

A

802.11 ax
OFDMA orthogonal frequency division multiple access
Can handle Communications with several clients at once

89
Q

Which of these accomplishes communication by breaking the data into sub signals and transmitting them simultaneously?

A) FHSS
B) DSSS
C) OFDM
D) RFID

A

OFDM - accomplishes communication by breaking the data into sub signals and transmitting them simultaneously. These Transmissions occur at different frequencies or sub-bands.

90
Q

Which of these accomplishes Communications by hopping the transmission over a range of predefined frequencies?

A) FHSS
B) DSSS
C) OFDM
D) RFID

A

FHSS frequency hopping spread Spectrum

91
Q

Which of these accomplishes communication by adding the data to be transmitted to a higher speed transmission. The higher speed transmission contains redundant information to ensure data accuracy. Each packet can then be reconstructed in the event of a disruption.

A) FHSS
B) DSSS
C) OFDM
D) RFID

A

DSSS - direct sequence spread Spectrum

92
Q

Which of the following are features that allow 80 2.11ac to achieve higher data throughput?

A) MIMO
B) Beamforming
C) channel bonding
D) CDM

A

MIMO = multiple input multiple output
Channel bonding

93
Q

Which of the following Network standards will not work with Category 5 cable?

A) 100 baseT
B) 10 baseT
C) 100 baseFX
D) 100 baseTX

A

100 baseFX uses fiber optic

100baseTX uses CAT5 and above
10baseT uses cat 3 and above

94
Q

Which of the following security standards was the first to introduce a dynamic 128 bit per packet security key?

A) WEP
B) TKIP
C) AES
D) CCMP

A

TKIP

WEP could use a 6-4-bit or 128-bit security key, but it was a static key.

95
Q

A technician needs to configure a wireless network for a company. Which wireless standard can he choose to get 600 Mbps bandwidth over either the 2.4 GHz or the 5 GHz frequency spectrum?

A) 802.11 b
B) 802.11 n
C) 802.11 a
D) 802.11 g

A

802.11 n

96
Q

Which of the following 802.11 standards provides data transmission speeds up to 54 Mbps and is Backward Compatible with a slower technology?

A) 802.11 b
B) 802.11 g
C) 802.11 i
D) 802.11 a

A

802.11 g

97
Q

Besides 802.11 standards, which wireless communication methods may work in the 2.4 GHz range?

A) long range fixed Wireless
B) satellite
C) Bluetooth
D) NFC
E) mmWave

A

Bluetooth
Long range fixed Wireless

mmWave = 24 & 86 Ghz
NFC = 13.56 MHz

98
Q

Which of the following standard supports a bandwidth of up to 54 Mbps in a 2.4 frequency spectrum?

A) 802.11 a
B) 802.11 i
C) 802.11 b
D) 802.11 g

A

802.11 g

99
Q

You are configuring a SOHO client to use TCP IP . Which parameter is needed to tell the client where to communicate to get on to the internet?

A) APIPA
B) dynamic address
C) static address
D) gateway

A

Gateway

100
Q

What is the maximum range for a Bluetooth Class 2 device?

A) 1m
B) 0.5m
C) 100m
D) 10m

A

10m

101
Q

What is the maximum range for a Bluetooth class 1 device?

A) 1m
B) 0.5m
C) 100m
D) 10m

A

100m

102
Q

What is the maximum range for a Bluetooth class 3 device?

A) 1m
B) 0.5m
C) 100m
D) 10m

A

1m

103
Q

What is the maximum range for a Bluetooth class 4 device?

A) 1m
B) 0.5m
C) 100m
D) 10m

A

0.5m

104
Q

Which of the following Technologies can operate in the 125khz to 134 khc range?

A) RFID
B) Bluetooth
C) LTE
D) NFC

A

RFID

105
Q

Which of the following wireless connection types utilize mimo on non-overlapping channels? Choose all that apply.

A) 802.11 b
B) 802.11 ac
C) 802.11 n
D) 802.11 a

A

802.11 ac
802.11 n

106
Q

AES is associated with?

A) WPA
B) WEP
C) TKIP
D) WPA2

A

WPA2

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