220-1002 · Question #192
Which of the following is a reason to use WPA over WEP?
The correct answer is B. Increased security. WEP (Wired Equivalent Privacy) uses the RC4 cipher with static 40- or 104-bit keys and a weak initialization vector (IV) scheme. Cryptographic attacks can crack WEP keys in minutes by passively collecting enough packets. WPA (Wi-Fi Protected Access) replaced WEP by introducing…
Question
Which of the following is a reason to use WPA over WEP?
Options
- ADevice compatibility
- BIncreased security
- CTACACS
- DMultifactor authentication
How the community answered
(64 responses)- A3% (2)
- B88% (56)
- C2% (1)
- D8% (5)
Explanation
WEP (Wired Equivalent Privacy) uses the RC4 cipher with static 40- or 104-bit keys and a weak initialization vector (IV) scheme. Cryptographic attacks can crack WEP keys in minutes by passively collecting enough packets. WPA (Wi-Fi Protected Access) replaced WEP by introducing TKIP (Temporal Key Integrity Protocol), which dynamically changes encryption keys per packet, and later WPA2 added AES-CCMP, a much stronger cipher. The primary reason to prefer WPA over WEP is therefore increased security (B). Device compatibility (A), TACACS (C, a AAA protocol unrelated to Wi-Fi encryption), and multifactor authentication (D) are not reasons specific to choosing WPA over WEP.
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