Comptia A+ 220-801 Chapter 8

Question 1

how fast can 802.11 transmit information and at what GHz? pg 340

Answer 1

1Mbps or 2Mbps bandwidths using the 2.4GHz frequency

Question 2

Whats the bandwidth and frequency for 802.11a? pg 340

Answer 2

802.11a standard provides WLAN bandwidth of up to 54Mbps in the 5GHz frequency spectrum.

Question 3

Whats the bandwidth and frequency for 802.11b? pg 341

Answer 3

802.11b provides for bandwidths of up to 11Mbps (with fallback rates of 5.5, 2, and 1Mbps) in the 2.4GHz range.

Question 4

Whats the bandwidth and frequency for 802.11g? pg 341

Answer 4

the 802.11g standard provides for bandwidths of 54Mbps in the 2.4GHz

Question 5

The most recent standard to hit the market is 802.11n , how fast can it transmit speed and what GHz ranges? pg 342

Answer 5

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.

Question 6

What is Frequency-hopping spread spectrum (FHSS)? pg 343

Answer 6

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.

Question 7

What is Direct-sequence spread spectrum (DSSS)? pg 343

Answer 7

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.

Question 8

Orthogonal frequency division multiplexing (OFDM) pg 343

Answer 8

OFDM accomplishes communicationby breaking the data into subsignals and transmitting them simultaneously. These transmissions occur on different frequencies or subbands.

Question 9

What is a (WAP)? pg 343

Answer 9

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

Question 10

Describe what the SSID is?

Answer 10

The SSID is basically the network name.

Question 11

What are the 3 ways to encrypt your wireless network? pg 345

Answer 11

WEP, WPA, and WPA2

Question 12

This was was one of the first security standards for wireless devices? pg 345

Answer 12

Wired Equivalency Protocol (WEP)

Question 13

What is a SOHO? pg 346

Answer 13

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.

Question 14

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

Answer 14

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.

Question 15

The first ADSL standard was approved in 1998 and offered maximum download speeds of these speeds?

Answer 15

8Mbps and upload speeds of 1Mbps.

Question 16

how fast can fiber optic down load information? pg 359

Answer 16

Up to 150Mbps

Question 17

on 100baseFX what kind of cable is used ,whats the max Speed and whats the max distance?

Answer 17

100BaseFX Multi-mode fiber 100Mbps 2000m

Question 18

what is the Frequency, Max Data Rate, indoor range, outdoor range of a N Router? pg 363

Answer 18

Type Frequency Maximum Data Rate Indoor Range Outdoor Range

n 2.4/5GHz 600Mbps 70m 250m

Question 19

Whats the most important thing to do before installing your first network? pg 366

Answer 19

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.

Question 20

how do you get to the option to connect to a network in Win 7? pg 371

Answer 20

Start > Control Panel > Network And Internet

and then choosing Connect To A Network.

Question 21

What are 6 key steps to designing and setting up a new network? 366-367

Answer 21

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.

Question 22

Installing a NIC in Windows 7? 368

Answer 22

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).

Question 23

Their are a few things you can do to increase the security of your wireless installation. Specifically, you can implement the following: pg 381

Answer 23

Disabling SSID broadcasts
Wireless encryption
MAC filtering
password protect your router

Question 24

is a strategy that allows an administrator to control resources to maintain a certain service level. pg 387

Answer 24

Quality of Service (QoS)

Question 25

QoS focuses on dealing with five different types of problems that can affect data on a network:

Answer 25

Delay, usually caused by congested routes that prevent critical data from arriving on time
Dropped packets, which often causes delay
Error, or corrupted data
Jitter, or variation in packet delay in a data stream
Out-of-order delivery, which can cause performance issues in time-sensitive applications
such as VoIP.

Question 26

What are the 3 non over lapping wireless channels?

Answer 26

1, 6, and 11.

Question 27

Listed in order from least to most secure, the common wireless security protocols include

Answer 27

WEP, WPA, and WPA2. WPA uses TKIP and WPA2 uses AES

Question 28

The basic method of configuring firewalls is to use pg 385

Answer 28

access control list (ACL).

Question 29

What is a network-based firewall ? pg 384

Answer 29

is what companies use to protect their private network from public networks.

Question 30

What is one thing you should always make sure is up to date on your router?

Answer 30

firmware.

Question 31

as an easy way for novice users to set up and configure a secure wireless network. With literally the push of a button on the wireless router, client computers would be able to connect to the router using the secure WPA2 encryption method.

Answer 31

WiFi Protected Setup (WPS)