Comptia A+ 220-801 Chapter 8 Flashcards
how fast can 802.11 transmit information and at what GHz? pg 340
1Mbps or 2Mbps bandwidths using the 2.4GHz frequency
Whats the bandwidth and frequency for 802.11a? pg 340
802.11a standard provides WLAN bandwidth of up to 54Mbps in the 5GHz frequency spectrum.
Whats the bandwidth and frequency for 802.11b? pg 341
802.11b provides for bandwidths of up to 11Mbps (with fallback rates of 5.5, 2, and 1Mbps) in the 2.4GHz range.
Whats the bandwidth and frequency for 802.11g? pg 341
the 802.11g standard provides for bandwidths of 54Mbps in the 2.4GHz
The most recent standard to hit the market is 802.11n , how fast can it transmit speed and what GHz ranges? pg 342
The standard claims to provide for bandwidth up to 600 Mbps, which sounds pretty fast. It works in both the 2.4GHz and 5GHz ranges.
What is Frequency-hopping spread spectrum (FHSS)? pg 343
FHSS accomplishes communication by hopping the transmission over a range of predefined frequencies. The changing, or hopping, is synchronized between both ends and appears to be a single transmission channel to both ends.
What is Direct-sequence spread spectrum (DSSS)? pg 343
DSSS accomplishes communication by adding
the data that is 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.
Orthogonal frequency division multiplexing (OFDM) pg 343
OFDM accomplishes communicationby breaking the data into subsignals and transmitting them simultaneously. These transmissions occur on different frequencies or subbands.
What is a (WAP)? pg 343
WAPs look nearly identical to wireless routers and provide central connectivity like wireless routers, but they don’t have nearly as many features.
a wireless access point (AP) is a device that allows wireless devices to connect to a wired network using Wi-Fi, or related standards
Describe what the SSID is?
The SSID is basically the network name.
What are the 3 ways to encrypt your wireless network? pg 345
WEP, WPA, and WPA2
This was was one of the first security standards for wireless devices? pg 345
Wired Equivalency Protocol (WEP)
What is a SOHO? pg 346
Short for small office/home office, a term that refers to the small or home office environment and the business culture that surrounds it. A SOHO is often thought of as being the smallest of small businesses. It is a privately owned and operated business or individuals who are self-employed. SOHO is often characterized as being a small in both the size of the office space and number of employees.
It seems that dial-up is considered to be a relic from the Stone Age of Internet access. But there are some reasons it might be the right solution: pg 347
The only hardware it requires is a modem and a phone cord.
It’s relatively easy to set up and configure.
It’s the cheapest online solution (usually $10 to $20 per month).
You can use it wherever there is phone service, which is just about everywhere.
The first ADSL standard was approved in 1998 and offered maximum download speeds of these speeds?
8Mbps and upload speeds of 1Mbps.
how fast can fiber optic down load information? pg 359
Up to 150Mbps
on 100baseFX what kind of cable is used ,whats the max Speed and whats the max distance?
100BaseFX Multi-mode fiber 100Mbps 2000m
what is the Frequency, Max Data Rate, indoor range, outdoor range of a N Router? pg 363
Type Frequency Maximum Data Rate Indoor Range Outdoor Range
n 2.4/5GHz 600Mbps 70m 250m
Whats the most important thing to do before installing your first network? pg 366
Before you run your first cable or place your first wireless router, know exactly where everything is supposed to go on the network. The only way you’ll be able to do this is to plan ahead. If you have planned the installation before you begin, the actual physical work of installing the network will be much easier.
how do you get to the option to connect to a network in Win 7? pg 371
Start > Control Panel > Network And Internet
and then choosing Connect To A Network.
What are 6 key steps to designing and setting up a new network? 366-367
Get a map,Locate your server(s).,Identify where client computers will be,Locate network resources,Determine how you are going to connect,Designate additional connectivity areas if needed.
Installing a NIC in Windows 7? 368
Power off the PC, remove the case
Secure the expansion card with the screw provided.
Put the case back on the computer and power it up
If there are conflicts, change any parameters so that
the NIC doesn’t conflict with any existing hardware.
Install a driver for the NIC for the type of operating system that you have.
After installing a NIC, you must hook the card to the network using the appropriatecable (if using wired connections).
Their are a few things you can do to increase the security of your wireless installation. Specifically, you can implement the following: pg 381
Disabling SSID broadcasts
Wireless encryption
MAC filtering
password protect your router
is a strategy that allows an administrator to control resources to maintain a certain service level. pg 387
Quality of Service (QoS)
