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%
A wireless controller:
398
A wireless LAN controller is used in combination with the Lightweight Access Point Protocol (LWAPP) to manage light-weight access points in large quantities by the network administrator or network operations center.
in wireless controller APs are lightweight, what does that mean/
398
the APs do not have a full OS running on them, the duties are split between the controller and the AP.
it is another term for lightweight APs.
398
thin AP.
an AP that run a full OS is known as——
398
thick AP.
it is a protocol used to enable APs and wireless controller network to communicate.
399
Lightweight Access Point Protocol or LWAPP
the newest protocol in use to enable APs and wireless controller network to communicate.
399
CAPWAP (Control and Provisioning of Wireless Access Points), is a protocol that allows Access controllers to manage WTPs (wireless termination points, or CAPWAP clients) over a network.
mobile hotspots.
399
With a mobile hotspot, you can create an Internet connection for up to five mobile devices on a 3G phone and up to 10 on a 4G LTE smartphone. After a few quick steps, the phone creates its own secure Wi-Fi network, which your devices can join.
what is signal degradation?
400
In telecommunication, degradation, is the loss of quality of an electronic signal, which may be categorized as either “graceful” or “catastrophic”, and has the following meanings: The deterioration in quality, level, or standard of performance of a functional unit.
what are some factors that effect signal strength?
401
Distance
