Network Replay Attack

What is a network replay attack?

• An attack that encrypts data to prevent unauthorized access.

• An attack where an attacker intercepts and retransmits a valid data transmission to deceive the recipient.

• An attack that compresses data to improve transmission speed.

• An attack that disrupts the physical network infrastructure.

What is the primary goal of a network replay attack?

• To encrypt all data transmissions.

• To improve network performance.

• To deceive the recipient into believing the retransmitted message is legitimate.

• To increase the size of data packets.

Which technique is commonly used to intercept data in a replay attack?

• Data compression

• Packet sniffing

• Data encryption

• Load balancing

Why are timestamps useful in preventing replay attacks?

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What is a nonce, and how does it help prevent replay attacks?

• A) A permanent identifier used for all sessions.

• B) A random value used only once to ensure replayed messages are detected as duplicates.

• C) An encryption key used for securing data.

• D) A compression algorithm to reduce data size.

How can session tokens prevent replay attacks?

• A) By compressing data during transmission.

• B) By using unique tokens for each session or transaction to prevent reuse.

• C) By encrypting all transmitted data.

• D) By increasing the network bandwidth.

Why is encryption important in preventing replay attacks?

• A) It reduces the size of data packets.

• B) It makes data transmission faster.

• C) It prevents attackers from capturing and understanding the data being transmitted.

• D) It increases network latency.

What role do message integrity checks play in preventing replay attacks?

• They compress data for faster transmission.

• They verify the integrity and authenticity of messages to ensure they have not been tampered with or replayed.

• They encrypt the data being transmitted.

• They increase the network's bandwidth.

How does time-limited validity of authentication tokens help prevent replay attacks?

• It ensures tokens have a limited validity period, reducing the window of opportunity for replay attacks.

• It increases the size of data packets.

• It compresses data during transmission.

• It encrypts the data being transmitted.

In a replay attack scenario, what might an attacker gain by intercepting and replaying a valid session token?

• Faster network speeds

• Unauthorized access to the user's account

• Increased data compression

• Improved data encryption