Chapter 23: Wireless Networking

The wireless Ethernet standard that runs at speeds up to 54 Mbps but has limited range because it uses the 5-GHz frequency is ______________.

802.11a

The wireless Ethernet standard that operates at a maximum of 54 Mbps on the 2.4-GHz frequency is ____________.

802.11g

Which of the following 802.11 standards can make use of both the 2.4- and 5-GHz bands?

802.11n

Which wireless standard combines the longest range with the most throughput?

802.11n

Two wireless nodes that are communicating directly with each other, without any intermediary systems or hardware, are using what wireless mode?

Ad hoc

A technology for setting up wireless PANs and connecting to some peripherals is called _____________.

Bluetooth

Personal area networks are created by what wireless technology?

Bluetooth

What standard gained a speed boost in its second version with Enhanced Data Rate technology?

Bluetooth

What is the best technology if you need Internet access from anywhere in the country?

Cellular wireless

What can limit wireless connectivity to a list of accepted users based on the hard-wired address of their wireless NIC?

MAC filtering

Which of the following devices is a major source of interference for Wi-Fi networks?

Microwaves

What is the technical name of a wireless network?

SSID

What is a cheap and easy way to extend the range of a WAP?

Upgrade the antenna.

What device centrally connects wireless network nodes in the same way that a hub or switch connects wired Ethernet PCs?

WAP

Which of these Wi-Fi security protocols is the least secure and is easily hacked?

WEP

Which encryption method used on wireless networks is the most secure?

WPA2

The 802.11 protocol is more commonly known as _______.

Wi-Fi

Of the three common wireless encryption protocols, ____________________ is the least secure.

Wired Equivalent Privacy (WEP)

Computers are in ______________ when they connect directly together without using a WAP.

ad hoc mode

802.11 implements _____________________________________ , which proactively avoids network packet collisions rather than simply detecting them when they occur.

carrier sense multiple access/collision avoidance (CSMA/CA)

If you need share an Internet connection or connect to a wired network through your wireless network, you would use _______________________.

infrastructure mode

The ____________________ feature enables devices on 802.11n networks to make multiple simultaneous connections, allowing for a theoretical throughput of 600 Mbps.

multiple in/multiple out (MIMO)

Establishing a unique_________________or network name helps ensure that only wireless network devices configured similarly are permitted access to the network.

service set identifier (SSID)

What is the approximate range of a Bluetooth PAN?

~30 ft

What is the approximate range of an 802.11b/g network?

~300 ft