estandares proteccion wi fi

What standards do we have? 
There's 802.11a, 802.11b, 802.11g and 802.11n. What are the differences? First let me show you this table:

	802.11a 02.11a	802.11b	802.11g	802.11n
Frequency	5GHz	2.4GHz	2.4GHz	2.4 GHz and 5GHz
Channels	23	3	3	depends
Data Rate	Up to 54Mbit	Up to 11Mbit	Up to 54Mbit	Up to 300-600Mbit

Security in WireLess Networks
Security of our data have to take care of well while using wireless network.Its hard to protect data in in WLANs than Lan network.Basic three security measures we use in WLANs are

• Filtering MAC addresses.
• Hiding your SSID (name of the network).
• Enabling WEP encryption.

http://sysnetnotes.blogspot.com/2013/05/wireless-networking-interview-questions.html