Network+ Jason Dion's practice test with correct
answers
Which type of wireless network utilizes the 5 GHz frequency band and reaches
speeds of up to 3.5 Gbps?
802.11ac
802.11ax
802.11g
802.11n
802.11a
802.11b - CORRECT ANSWERS ✔✔802.11ac OBJ-2.4: The 802.11ac (Wireless AC or
Wi-Fi 5) standard utilizes a 5 GHz frequency to provide wireless networking at
theoretical speeds up to 3.5 Gbps. Wireless AC uses channel bonding to create a
single channel of up to 160 MHz to provide additional bandwidth. Wireless AC uses
multi-user multiple-input-multiple-output (MU-MIMO) technology to use multiple
antennas to transmit and receive data at higher speeds.
Tamera just purchased a Wi-Fi-enabled Nest Thermostat for her home. She has hired
you to install it, but she is worried about a hacker breaking into the thermostat since
it is an IoT device. Which of the following is the BEST thing to do to mitigate
Tamera's security concerns? (Select TWO)
Disable wireless connectivity to the thermostat to ensure a hacker cannot access it
Enable two-factor authentication on the device's website (if supported by the
company)
Configure the thermostat to connect to the wireless network using WPA2 encryption
and a long, strong password
,Configure the thermostat to use the WEP encryption standard for additional
confidentiality
Configure the thermostat to use a segregated part of the network by installing it into
a screened subnet
Upgrade the firmware of the wireless access point to the latest version to improve the
security of the network - CORRECT ANSWERS ✔✔Configure the thermostat to
connect to the wireless network using WPA2 encryption and a long, strong password,
Configure the thermostat to use a segregated part of the network by installing it into
a screened subnet
Which type of wireless technology are OFDM, QAM, and QPSK examples of?
Spectrum
Frequency
RF interference
Modulation - CORRECT ANSWERS ✔✔Modulation OBJ-2.4: Modulation is the
process of varying one or more properties of a periodic waveform, called the carrier
signal, with a separate signal called the modulation signal that typically contains
information to be transmitted. WiFi can use different digital modulation schemes for
data transmission. Common types of modulation include Orthogonal frequency-
division multiplexing (OFDM), Quadrature Amplitude Modulation (QAM), and
Quadrature Phase-shift keying (PSK).
Which of the following levels would a debugging condition generate?
0
6
7
1 - CORRECT ANSWERS ✔✔7 OBJ-3.1: The severity levels range from zero to seven,
with zero being the most severe and seven being the least severe. Level 0 is used for
,an emergency and is considered the most severe condition because the system has
become unstable. Level 1 is used for an alert condition and means that there is a
condition that should be corrected immediately. Level 2 is used for a critical
condition, and it means that there is a failure in the system's primary application and
it requires immediate attention. Level 3 is used for an error condition, and it means
that something is happening to the system that is preventing the proper function.
Level 4 is used for warning conditions and it may indicate that an error will occur if
action is not taken soon. Level 5 is used for notice conditions and it means that the
events are unusual, but they are not error conditions. Level 6 is used for information
conditions and it is a normal operational message that requires no action. Level 7 is
used for debugging conditions and is just information that is useful to developers as
they are debugging their networks and applications.
Your company is currently using a 5 GHz wireless security system, so your boss has
asked you to install a 2.4 GHz wireless network to use for the company's computer
network to prevent interference. Which of the following can NOT be installed to
provide a 2.4 GHz wireless network?
802.11b
802.11g
802.11n
802.11ac - CORRECT ANSWERS ✔✔802.11ac The 802.11ac (Wireless AC or Wi-Fi 5)
standard utilizes a 5 GHz frequency to provide wireless networking at theoretical
speeds up to 5.5 Gbps.
You have been asked to connect three 802.11a devices to an 802.11g access point
configured with WEP. The devices are within 20 feet of the access point, but they still
cannot associate with the access point. Which of the following is the MOST likely
cause of the devices not associating with the WAP?
Frequency mismatch
Signal loss
, Mismatched encryption
Interference - CORRECT ANSWERS ✔✔frequency mismatch OBJ-2.4: 802.11a
operates in the 5 GHz band, while 802.11g operates in the 2.4 GHz band. Therefore,
802.11a devices will be unable to communicate with 802.11b or 802.11g access points.
Wireless networks utilize three different frequency bands: 2.4 GHz, 5 GHz, and 6
GHz. The 2.4 GHz frequency band is used by 802.11b, 802.11g, and 802.11n. The 5
GHz frequency band is used by 802.11a, 802.11n, 802.11ac, and 802.11ax. The 6 GHz
frequency band is used by Wi-Fi 6E under the 802.11ax standard.
You have installed and configured a new wireless router. The clients and hosts can
ping each other. The network uses a fiber optic WAN connection with 1 Gbps
throughput. The wired clients have fast connections, but the wireless clients are
displaying high latency when a ping is performed. The wireless clients are also only
receiving 300 Mbps when downloading files from the Internet. Which of the
following is MOST likely the cause of the slow speeds experienced by the wireless
clients?
A fiber connection does not support wireless
The network should use 802.11g WAPs to increase throughput
The wireless access point is experiencing RF interference
A high signal-to-noise ratio on the wireless network - CORRECT ANSWERS ✔✔The
wirless access point is experiencing RF interfence. OBJ-5.4: If interference in the
wireless spectrum occurs, more retransmissions will be needed (and thereby slowing
speeds experienced and increasing latency).
Which of the following IEEE specifications describes the use of VLANs?
802.1q
802.3af
802.1x
answers
Which type of wireless network utilizes the 5 GHz frequency band and reaches
speeds of up to 3.5 Gbps?
802.11ac
802.11ax
802.11g
802.11n
802.11a
802.11b - CORRECT ANSWERS ✔✔802.11ac OBJ-2.4: The 802.11ac (Wireless AC or
Wi-Fi 5) standard utilizes a 5 GHz frequency to provide wireless networking at
theoretical speeds up to 3.5 Gbps. Wireless AC uses channel bonding to create a
single channel of up to 160 MHz to provide additional bandwidth. Wireless AC uses
multi-user multiple-input-multiple-output (MU-MIMO) technology to use multiple
antennas to transmit and receive data at higher speeds.
Tamera just purchased a Wi-Fi-enabled Nest Thermostat for her home. She has hired
you to install it, but she is worried about a hacker breaking into the thermostat since
it is an IoT device. Which of the following is the BEST thing to do to mitigate
Tamera's security concerns? (Select TWO)
Disable wireless connectivity to the thermostat to ensure a hacker cannot access it
Enable two-factor authentication on the device's website (if supported by the
company)
Configure the thermostat to connect to the wireless network using WPA2 encryption
and a long, strong password
,Configure the thermostat to use the WEP encryption standard for additional
confidentiality
Configure the thermostat to use a segregated part of the network by installing it into
a screened subnet
Upgrade the firmware of the wireless access point to the latest version to improve the
security of the network - CORRECT ANSWERS ✔✔Configure the thermostat to
connect to the wireless network using WPA2 encryption and a long, strong password,
Configure the thermostat to use a segregated part of the network by installing it into
a screened subnet
Which type of wireless technology are OFDM, QAM, and QPSK examples of?
Spectrum
Frequency
RF interference
Modulation - CORRECT ANSWERS ✔✔Modulation OBJ-2.4: Modulation is the
process of varying one or more properties of a periodic waveform, called the carrier
signal, with a separate signal called the modulation signal that typically contains
information to be transmitted. WiFi can use different digital modulation schemes for
data transmission. Common types of modulation include Orthogonal frequency-
division multiplexing (OFDM), Quadrature Amplitude Modulation (QAM), and
Quadrature Phase-shift keying (PSK).
Which of the following levels would a debugging condition generate?
0
6
7
1 - CORRECT ANSWERS ✔✔7 OBJ-3.1: The severity levels range from zero to seven,
with zero being the most severe and seven being the least severe. Level 0 is used for
,an emergency and is considered the most severe condition because the system has
become unstable. Level 1 is used for an alert condition and means that there is a
condition that should be corrected immediately. Level 2 is used for a critical
condition, and it means that there is a failure in the system's primary application and
it requires immediate attention. Level 3 is used for an error condition, and it means
that something is happening to the system that is preventing the proper function.
Level 4 is used for warning conditions and it may indicate that an error will occur if
action is not taken soon. Level 5 is used for notice conditions and it means that the
events are unusual, but they are not error conditions. Level 6 is used for information
conditions and it is a normal operational message that requires no action. Level 7 is
used for debugging conditions and is just information that is useful to developers as
they are debugging their networks and applications.
Your company is currently using a 5 GHz wireless security system, so your boss has
asked you to install a 2.4 GHz wireless network to use for the company's computer
network to prevent interference. Which of the following can NOT be installed to
provide a 2.4 GHz wireless network?
802.11b
802.11g
802.11n
802.11ac - CORRECT ANSWERS ✔✔802.11ac The 802.11ac (Wireless AC or Wi-Fi 5)
standard utilizes a 5 GHz frequency to provide wireless networking at theoretical
speeds up to 5.5 Gbps.
You have been asked to connect three 802.11a devices to an 802.11g access point
configured with WEP. The devices are within 20 feet of the access point, but they still
cannot associate with the access point. Which of the following is the MOST likely
cause of the devices not associating with the WAP?
Frequency mismatch
Signal loss
, Mismatched encryption
Interference - CORRECT ANSWERS ✔✔frequency mismatch OBJ-2.4: 802.11a
operates in the 5 GHz band, while 802.11g operates in the 2.4 GHz band. Therefore,
802.11a devices will be unable to communicate with 802.11b or 802.11g access points.
Wireless networks utilize three different frequency bands: 2.4 GHz, 5 GHz, and 6
GHz. The 2.4 GHz frequency band is used by 802.11b, 802.11g, and 802.11n. The 5
GHz frequency band is used by 802.11a, 802.11n, 802.11ac, and 802.11ax. The 6 GHz
frequency band is used by Wi-Fi 6E under the 802.11ax standard.
You have installed and configured a new wireless router. The clients and hosts can
ping each other. The network uses a fiber optic WAN connection with 1 Gbps
throughput. The wired clients have fast connections, but the wireless clients are
displaying high latency when a ping is performed. The wireless clients are also only
receiving 300 Mbps when downloading files from the Internet. Which of the
following is MOST likely the cause of the slow speeds experienced by the wireless
clients?
A fiber connection does not support wireless
The network should use 802.11g WAPs to increase throughput
The wireless access point is experiencing RF interference
A high signal-to-noise ratio on the wireless network - CORRECT ANSWERS ✔✔The
wirless access point is experiencing RF interfence. OBJ-5.4: If interference in the
wireless spectrum occurs, more retransmissions will be needed (and thereby slowing
speeds experienced and increasing latency).
Which of the following IEEE specifications describes the use of VLANs?
802.1q
802.3af
802.1x
