[&] What is the main purpose of the PBKDF2 function in WPA2?
- To derive a pairwise transient key from the pairwise master key
- To derive a pairwise master key from the shared passphrase -- Correct
- To encrypt packets using a temporary key
- To verify the identity of wireless clients

[&] What is a potential vulnerability of WPA2 when using weak passphrases?
- Slower decryption of data frames
- Slow internet speed
- Complex key management
- Easy offline dictionary attacks -- Correct

[&] How many iterations does the PBKDF2 function perform in WPA2 to strengthen the passphrase?
- 8,192 times
- 1,024 times
- 2,048 times
- 4,096 times -- Correct

[&] What is the length of the pairwise master key derived by PBKDF2 in WPA2?
- 160 bits
- 128 bits
- 256 bits -- Correct
- 384 bits

[&] Why is the fixed iteration count in PBKDF2 considered a flaw in WPA2?
- It limits resistance to modern brute-force attacks by using too few iterations -- Correct
- It can cause instability when generating session keys
- It increases the time required for clients to connect to the network
- It occasionally produces mismatched passphrase hashes

[&] In WPA2, what serves as the 'salt' in the PBKDF2 function?
- The SSID of the wireless network -- Correct
- The MAC address of the device
- The access point's IP address
- The user's email address