Wireless Networking

Question 1

What are wireless access points commonly known as?

Answer 1

WAPs

APs

Or access points.

Question 2

What is the difference between Infrastructure Mode and Adhoc networks?

Answer 2

Infrastructure mode use one or more WAPs to connect the wireless network nodes to a wired network segment

Ad hoc mode is sometimes called peer-to-peer mode, with each wireless node in direct contact with every other node in a decentralized free-for-all

Question 3

What’s MAC Address Filtering?

Answer 3

A method that enables you to limit access to your wireless network based on the physical, hard-wired address of the units’ wireless NIC.

Question 4

What’s WEP? Describe it’s characteristics.

Answer 4

Wired Equivalent Privacy

64-bit or 128-bit key size encryption

Question 5

What is WPA? Describe it’s characteristics.

Answer 5

Wi-Fi Protected Access

Used RC4 cipher as a TKIP (Temporal Key Integrity Protocol). Provides a new encryption key for every sent packet

Question 6

What is WPA2? Describe it’s characteristics.

Answer 6

Wi-Fi Protected Access 2

Replaced TKIP with CCMP (Counter Mode with Cipher Block Chaining Message Authentication Code Protocol)

Replaced RC4 with AES (Advanced Encryption Standard)

WPA2 is the latest and most secure wireless encryption method

Question 7

What’s the top speed for data transfers using IrDA technology?

Answer 7

Data transfers using the IrDA protocol top out at 4 Mbps.

Question 8

Bluetooth technology enables computers to link into what sort of network?

Answer 8

Bluetooth creates “personal area networks.”

Question 9

What is the name for the common omni-directional antennas found on wireless access points?

Answer 9

Standard omni-directional antennas are called dipole antennas.