NCTI WIFI (2022/2023) Rated A+
Notes
Single input, single output (SISO) - Most systems have one radio and one antenna, and some
systems have one radio and two antennas.
Multiple input, multiple output (MIMO) - These
...
NCTI WIFI (2022/2023) Rated A+
Notes
Single input, single output (SISO) - Most systems have one radio and one antenna, and some
systems have one radio and two antennas.
Multiple input, multiple output (MIMO) - These systems use multiple radio chains in a single
wireless chipset.
Multi-user MIMO (MU-MIMO) - These systems use each radio chain on an access point to
transmit to a unique client.Correct answer:
Wired Equivalent Protection (WEP) - This type of security setup should never be used for a
wireless network as it can be quickly be broken.
WPA/WPa2 -Personal - This type of security uses an 8-63 character passphrase that all network
users share.
WPA/WPA2-Enterprise - In this type of security setup, everyone has a unique username and
password, which allows IT departments to track individual users and reset unique user passwords
without having to change the passphrase for the entire network.
Wi-Fi Protected Setup (WPS) - This type of security setup allows new devices to be added to a
network with a button press or an 8-digit PIN number.
test one
Question #1: Multiple Choice - choose 1 answer
Which modulation scheme works by varying the height, or loudness, of a wave to convey
information?
B) Amplitude modulation (AM).
Question #2: Multiple Choice - choose 1 answer
Which modulation scheme works by adjusting the length of a wave to convey information?
B) Frequency modulation (FM).
Question #3: Multiple Choice - choose 1 answer
Which IEEE standard specifies media access and Physical Layer specifications for wireless
connectivity between fixed, portable, and moving stations within a local area?
C) 802.11.
Question #4: Multiple Choice - choose 1 answer
Which IEEE 802.11 amendment is a 5 GHz-only standard that can theoretically reach 7 Gbps?
A) 802.11ac.
Question #5: Multiple Choice - choose 1 answer
Which of the following is an example of a wide area network (WAN)?
B) The Internet.
Question #6: Multiple Choice - choose 1 answer
Which of the following handles the long distance wide area network (WAN) communication link
with the Internet service provider or managed services operator?
C) Modem.
Question #7: Multiple Choice - choose 1 answer
What connects wireless client devices, such as laptops, phones, tablets, and media players to the
wired network?
C) Access point.
Question #8: Multiple Choice - choose 1 answer
Which type of directional antenna is usually called a "high-density" directional antenna?
B) Semi-directional antenna.
Question #9: Multiple Choice - choose 1 answer
What type of system uses one radio chain to transmit and receive data?
A) Single input, single output (SISO).
Question #10: Multiple Choice - choose 1 answer
Which security setup allows new devices to be added to a network with a button press or an 8-
digit PIN?
D) Wi-Fi Protected Setup (WPS).
9-15-1 Understanding Wi-Fi
Question #1: Multiple Choice - choose 1 answer
Which security standard is considered the best form of security because it is the most secure and
does not limit network data rates?
D) Wi-Fi Protected Access 2/Advanced Encryption Standard (WPA2/AES)
Question #2: Multiple Choice - choose 1 answer
How many channels are available in the 5 GHz ba
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