Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA) ISE Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A technician is setting up a legacy WEP network and needs to configure a 128-bit WEP key. The access point asks for the key in hexadecimal format. How many hexadecimal characters should the technician enter?

   • A16 hexadecimal characters
   • B32 hexadecimal characters
   • C26 hexadecimal characters
   • D13 hexadecimal characters
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   In the history of Wi-Fi security, which statement best describes the role of WEP?

   • AIt was the first widely adopted encryption protocol for Wi-Fi, though it later proved insecure
   • BIt was a robust security protocol that remained secure for over a decade
   • CIt was an optional feature that only a few early devices supported
   • DIt was a proprietary protocol developed by a single vendor
   Reveal Solution Discussion Select an answer first
4. 18expert · hard

   A company is planning to upgrade its wireless security from WPA to WPA2. The current access points support WPA2, but some legacy IoT devices only support WPA. The security team wants to maintain compatibility while improving security. Which configuration should be used?

   • ADisable all encryption and use MAC address filtering for security.
   • BKeep WPA with TKIP for all devices to ensure compatibility.
   • CEnable WPA2 with TKIP as the only encryption method.
   • DEnable WPA2 with AES-CCMP and disable TKIP, but create a separate SSID for legacy devices using WPA with TKIP.
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   Which of the following is a major cryptographic flaw in WEP?

   • AIt reuses the same keystream when the 24-bit IV repeats
   • BIt does not encrypt the data, only the header
   • CIt uses a block cipher that is vulnerable to padding oracle attacks
   • DIt uses a 128-bit key that is too long for RC4
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   What integrity mechanism does WEP use, and why is it considered weak?

   • AIt uses a message authentication code (MAC) based on AES
   • BIt uses a digital signature that is difficult to verify
   • CIt uses a 32-bit CRC-32 checksum that is not cryptographically secure
   • DIt uses a SHA-1 hash that is too slow
   Reveal Solution Discussion Select an answer first