Wireless Security

Question 1

PSK

Answer 1

Pre-Shared Key - Both AP and client uses same encryption key

Question 2

WEP

Answer 2

Wired Equivalent Privacy - Original 802.11 wireless security standard and claimed to be as secure as wired networks. Used 40-bit pre shared key and eventually to 64 and then 128 bits.

Question 3

24 bit initialization vector

Answer 3

Sent in Clear text and it was easy to crack and guess the pre shared key

Question 4

WPA

Answer 4

Wi-Fi Protected acess - Replaced WEP and its weaknesses. It follow TKIP and uses message integrity Check

Question 5

TKIP

Answer 5

Temporal Key integrity Protocol

Question 6

MIC

Answer 6

Message Integrity Check - confirms data was not modified in Transit

Question 7

RC4

Answer 7

Rivest Cipher 4 used for WPA encryption

Question 8

Enterprise Mode WPA

Answer 8

Users can be required to authenticate before exchanging keys (keys between client and AP are temporary)

Question 9

WPA2

Answer 9

Wifi Protected Access 2 - Created as part of IEEE 802.11i standard and requires strongger encryption and integrity checking through Counter Mode with Cipher Block Chaining Message

Question 10

CCMP

Answer 10

Part of WPA2 Security

Question 11

AES

Answer 11

Advanced Encryption Standard - 128 bit key or above

Question 12

4 Things to remember for Wireless security on Exam

Answer 12

1. Open - No Security
2. WEP - IV
3. WPA - TKIP and RC4
4. WPA2 - CCMP and AES

Question 13

Network Authentication 802.1x

Answer 13

Each wireless user authenticates with their own creds,

Question 14

EAP

Answer 14

Extensible Authentication Protocol - Used under 802.1x

Question 15

NAC

Answer 15

Network Admission control - Permits or denies access to the network based on characteristics of the device instead of checking creds