Wireless, Cryptography & Cloud
44 practice questions with explanations — 15 free to try
3 of these 44 questions are in the free 15-question taster · the full topic is part of Premium
PassNova has 44 Certified Ethical Hacker (CEH) practice questions on Wireless, Cryptography & Cloud, each with a clear explanation. A 15-question taster is free with no sign-up; the full bank is part of PassNova Premium. Updated for 2026.
Wireless, Cryptography & Cloud: example questions & answers
3 worked examples with answers and explanations below. Try 15 Certified Ethical Hacker (CEH) questions free in the browser; the full 44-question Wireless, Cryptography & Cloud bank is part of PassNova Premium.
To crack a WPA2-PSK network offline, an attacker first needs to capture which piece of information by deauthenticating a client and waiting for it to reconnect?
- AThe ISP account password
- BThe DHCP lease table
- CThe router's serial number
- DThe 4-way handshake✓
Answer: Capturing the WPA2 4-way handshake lets an attacker perform an offline dictionary or brute-force attack against the pre-shared key, commonly forcing it by sending deauthentication frames.
Which statement correctly describes the difference between symmetric and asymmetric encryption?
- ASymmetric uses one shared key for encryption and decryption; asymmetric uses a public/private key pair✓
- BSymmetric is always slower than asymmetric encryption
- CAsymmetric encryption uses the same shared key for both parties and is therefore always faster than symmetric ciphers
- DSymmetric encryption cannot be used for bulk data
Answer: Symmetric encryption (e.g., AES) uses a single shared secret key for both encryption and decryption, whereas asymmetric encryption (e.g., RSA) uses a mathematically linked public and private key pair.
What primary security property does a cryptographic hash function such as SHA-256 provide?
- AAvailability, by compressing files so that they transfer faster across a congested network link
- BNon-repudiation, by exchanging session keys between the two communicating parties before transfer
- CConfidentiality, by encrypting the data so that it can later be decrypted with the same digest
- DIntegrity, by producing a fixed-length one-way digest that changes if the input changes✓
Answer: A cryptographic hash is a one-way function producing a fixed-length digest; any change to the input changes the output, making hashes ideal for verifying data integrity (they are not reversible like encryption).