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Questions and Answers
What does WPA stand for in the context of wireless networking?
What does WPA stand for in the context of wireless networking?
- Wi-Fi Protocol Access
- Wireless Protected Access
- Wi-Fi Protected Access (correct)
- Wireless Personal Access
Which encryption method is vulnerable and no longer considered secure for modern wireless networks?
Which encryption method is vulnerable and no longer considered secure for modern wireless networks?
- AES
- RC4
- TKIP (correct)
- Rijndael
What is the maximum key length that AES can use?
What is the maximum key length that AES can use?
- 192 bits
- 256 bits
- Both B and C (correct)
- 128 bits
Which protocol is usually paired with AES for encryption?
Which protocol is usually paired with AES for encryption?
How does TKIP improve security compared to WEP?
How does TKIP improve security compared to WEP?
What type of ciphers does AES use for encryption?
What type of ciphers does AES use for encryption?
What is the primary purpose of authentication protocols in wireless networks?
What is the primary purpose of authentication protocols in wireless networks?
Which encryption method was commonly used with WPA and WPA2 standards?
Which encryption method was commonly used with WPA and WPA2 standards?
What does RADIUS primarily use for sending user credentials to the server?
What does RADIUS primarily use for sending user credentials to the server?
Which port does RADIUS use for authentication and authorization?
Which port does RADIUS use for authentication and authorization?
What is a key difference between TACACS+ and RADIUS?
What is a key difference between TACACS+ and RADIUS?
Which of the following functions does Kerberos NOT provide?
Which of the following functions does Kerberos NOT provide?
What protocol is often used alongside Kerberos to enhance security?
What protocol is often used alongside Kerberos to enhance security?
What is the primary role of AAA protocols?
What is the primary role of AAA protocols?
What does the KDC in Kerberos stand for?
What does the KDC in Kerberos stand for?
What type of packet does TACACS+ use to send user credentials?
What type of packet does TACACS+ use to send user credentials?
What was the primary goal of developing TACACS+?
What was the primary goal of developing TACACS+?
Which authentication protocol was developed by MIT?
Which authentication protocol was developed by MIT?
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Study Notes
Wireless Network Security
- TKIP: Older encryption method for WPA and WPA2 networks, designed to improve upon WEP's weaknesses. Uses a unique key for each packet by combining a base key, access point's MAC address, and a packet serial number.
- AES: Currently the strongest and recommended encryption protocol for wireless networks. Uses block ciphers of 128 bits with a key of up to 256 bits in length. Utilizes the Rijndael algorithm and commonly works with CCMP.
Authentication Protocols
- RADIUS: Open-standard protocol for authentication. Uses UDP packets to send credentials for validation to the RADIUS server. Uses port 1812 for authentication/authorization and 1813 for accounting.
- TACACS+: Developed by Cisco, addresses security concerns in RADIUS. Similar functionality but uses TCP packets to port 49 and encrypts all packets. Primarily utilized on Cisco devices.
- Kerberos: Developed by MIT, default authentication protocol for Windows 2000 and newer, a key part of Active Directory. Uses a three-part system: client, authentication server, and KDC. Provides seamless authentication for users and servers but lacks authorization and accounting. Often used with RADIUS or TACACS+ to provide more security.
AAA Protocols
- Authentication, Authorization, and Accounting. RADIUS and TACACS+ are both considered AAA protocols as they provide these three functions.
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