OBJ 2.4 X Flashcards
802.11 a
5GHz Band, 54 Mbps Bandwidth
802.11b
2.4 GHz Band, 11 Mbps Bandwidth
802.11g
2.4 GHz Band, 54 Mbps Bandwidth
802.11n (WiFi 4)
2.4 and 5 GHz Band, 150 Mbps/600 Mbps (MIMO)
802.11 ac (WiFi5)
5 GHz Band, 3 Gbps (MU-MIMO)
802.11ax (WiFi6)
2.4, 5, and 6 GHz Band, 9.6 Gbps (MU-MIMO)
2.4GHz frequency
2.4 GHz to 2.5 GHz range
5GHz frequency
5.75 GHz to 5.875 GHz range
Channel bonding
Allows you to create a wider channel by merging neighboring channels
into one
Service set identifier (SSID)
- Basic service set
- Extended service set
- Independent basic service set (Ad-hoc)
- Roaming
- WiFi Protected Access (WPA)/WPA2 Personal [Advanced Encryption Standard (AES)/
● Preferred symmetric encryption standard
● Used by WPA2
● Available in 128-bit, 192-bit, and 256-bit keys
▪ Sender and receiver use the same key to encrypt and decrypt the
messages
Temporal Key Integrity Protocol (TKIP)]
● 48-bit Initialization Vector (IV) instead of 24-bit IV
● Rivest Cipher 4 (RC4) used for encryption
WPA/WPA2 Enterprise (AES/TKIP)
▪ Created as part of IEEE 802.11i standard
● Requires stronger encryption and integrity checks
● Integrity checking through CCMP
o Counter Mode with Cipher Block Chaining Message
Authentication Code Protocol
▪ Uses Advanced Encryption Standard (AES)
● 128-bit key or above
▪ Supports two modes
● Personal mode with pre-shared keys
Code-division multiple access (CDMA)
o A cellular technology that uses, code division, to split up the channel
o For every call that is made, the data is encoded with a unique key and then all the data streams can be transmitted at once in a single channel
Global System for Mobile Communications (GSM)
o A cellular technology that takes your voice during a call and converts it to digital data
o A SIM card is used to identify yourself to the network
