Encryption

1. What is the primary purpose of encryption in data transmission?

• • a) To compress the data

• • b) To alter the data format

• • c) To guard against eavesdropping

• • d) To increase data transmission speed

What is the data called before it is encrypted?

• • a) Cipher Text

• • b) Plain Text

• • c) Keystream

• • d) Public Key

In asymmetric encryption, what type of key is used by the sending station to encrypt data?

• • a) Symmetric Key

• • b) Private Key

• • c) Public Key

• • d) RC4 Key

Which of the following is true about symmetric encryption?

• • a) It uses different keys for encryption and decryption.

• • b) It uses the same key for both encryption and decryption.

• • c) It does not require any key for decryption.

• • d) It uses a public key for encryption and a private key for decryption.

What algorithm is mentioned in the passage for encoding data transmitted on a wireless network?

• • a) Advanced Encryption Standard (AES)

• • b) Data Encryption Standard (DES)

• • c) Rivest Cipher 4 (RC4)

• • d) Triple DES

What was the original security protocol defined in the IEEE 802.11 specifications?

• • a) WPA

• • b) WPA2

• • c) WEP

• • d) EAP

Which key is used to encrypt and decrypt packets in WEP?

• • a) Public Key

• • b) Shared Key

• • c) Private Key

• • d) Symmetric Key

How many encryption configurations does WEP support?

• • a) One

• • b) Two

• • c) Three

• • d) Four

One of the limitations of WEP is that it uses a single pair of keys shared among users. What is a consequence of this?

• • a) Easier configuration

• • b) Stronger encryption

• • c) Network compromise if keys are compromised

• • d) Faster authentication

How does WPA combat attacks that analyze the cipher statistically?

• • a) It uses a 256-bit key

• • b) It changes the key every 10,000 packets

• • c) It encrypts data with the same key continuously

• • d) It eliminates the IV altogether