Describe the function of the wireless spectrum.?

Question

What are some of the flaws that occur when sending wireless signals?

Answer 1

You have two totally different questions here that should be asked individually. I will answer your second question at this point since i'm more familiar with wireless security.

Security is one if not the main flaw when sending wireless signals at a company or home network.

Some of the flaws are as follow:

Identity Theft (MAC Spoofing):
Identity theft (or MAC Spoofing) occurs when a cracker is able to listen in on network traffic and identify the MAC address of a computer with network privileges. Most wireless systems allow some kind of MAC filtering to only allow authorized computers with specific MAC IDs to gain access and utilize the network. However, a number of programs exist that have network “sniffing” capabilities. Combine these programs with other software that allow a computer to pretend it has any MAC address that the cracker desires, and the cracker can easily get around that hurdle.

Malicious Association:
“Malicious associations” are when wireless devices can be actively made by crackers to connect to a company network through their cracking laptop instead of a company access point (AP). These types of laptops are known as “soft APs” and are created when a cracker runs some software that makes his/her wireless network card look like a legitimate access point. Once the cracker has gained access, he/she can steal passwords, launch attacks on the wired network, or plant trojans. Since wireless networks operate in the Layer-2 world, Layer-3 protections such as network authentication and virtual private networks (VPNs) offer no protection. Wireless 802.1x authentications do help with protection but are still vulnerable to cracking. The idea behind this type of attack may not be to break into a VPN or other security measures. Most likely the cracker is just trying to take over the client at the Layer-2 level.

For More go here:
http://en.wikipedia.org/wiki/Wireless_security