chapter 12 Flashcards
WLAN
381
Wireless Local Area Network, WLAN is a type local network that utilizes radio waves, rather than wires, to transmit data. Today’s computers have WLAN built onboard, which means no additional Wi-Fi card needs to be installed.
The FCC has released 3 unlicensed bands for public to use what are they?
381
900MHz, 2.4GHz and the 5GHz.
what are the most used wireless network standard?
382
802.11b/g/n
what is the newest 802.11 standard?
382
802.11ac
802.11b:
384
802.11b is capable of transmissions of up to 11 Mbps and operates in the 2.4 GHz band.
802.11g:
387
Capable of transmissions of up to 20 Mbps and operates in the 2.4, 3.6, and 5 GHz bands.
802.11a:
386
Capable of transmissions of up to 54 Mbps and operates in the 5 GHz band.
802.11n:
388
Operates using the 2.4GHz and 5GHz bandwidths. It utilizes multiple-input, multiple-output (MIMO) antennas to improve data transfer speeds.
802.11h:
388
it allows for communication for both the 2.4GHz and the 5GHz frequencies by using channel bonding.
802.11ac:
389
802.11ac represents an extension or update of the current 802.11a standard.
it works in the 5GHz and delivers up to 1Gb throughput.
3 wireless component what are they?
391 to 393
Wireless Access Point.
wireless network interface card.
Wireless antennas.
Wireless Access Point.
391
an access point is a wireless receiver which enables a user to connect to a network or the Internet without using any wires. This term can refer to both Wi-Fi and Bluetooth devices.
wireless network interface card.
392
a wireless network interface card is a network card which is used to connect radio-based computer networks. WNICs uses an antenna to communicate through microwaves and is typically connected using the computer’s PCI bus or USB port.
Wireless antennas.
393
an access point is a wireless receiver which enables a user to connect wirelessly to a network or the Internet. This term can refer to both Wi-Fi and Bluetooth devices.
what are the 2 broad classes of antennas on the market?
393
Omni-Directional ( Point-to-Multi-Point)
Directional or Yagi ( Point-to-Point )
2 main installation type for Wireless network what are they?
395
Ad hoc mode: independent basic service set(ibss)
Infrastructure mode: basic service set (BSS)
Ad hoc mode:
395
ad hoc mode. The mode of operation in a peer-to-peer wireless network, such as Wi-Fi or Bluetooth, in which computers communicate with each other rather than to a central base station (access point).
Infrastructure mode
396
Infrastructure mode requires a central access point that all devices connect to.
Ad-hoc networks don’t require a centralized access point. Instead, devices on the wireless network connect directly to each other. True/false
395
true
in ad Hoc mode two computer can connect to each other if they are within range of ___m to ___m of each other.
395
90m to 100m
what is SSID?
396
Service Set IDentifier, SSID is a 32 character identifier given to devices on a wireless network. A device wanting to connect to a wireless network with a SSID enabled must have the same SSID to communicate.
all devices in the same wireless network are configured with the same SSID. T/F
396
True
for users to be able to use the wireless network with out losing connection the APs most be overlapping. T/F
397
true
to be able to have access to the wireless network between APs, APs need to be overlap by ___% or more of their signal.
397
10%
