[&] What is a major disadvantage of SMS-based two-factor authentication?
- It's inconvenient for user authentication
- It's vulnerable to SIM swapping and phishing attacks
- It does not support time-based OTPs
- It requires a smartphone

[&] What is the primary purpose of two-factor authentication (2FA)?
- To make login processes faster and more efficient
- To provide a backup access method if the password is forgotten
- To augment existing authentication mechanisms with a second security layer
- To replace passwords with a more modern solution

[&] How can network security improve the robustness of 2FA implementations?
- By using encrypted communication channels for transmitting OTPs
- By employing faster servers for OTP generation
- Through longer password requirements
- By limiting authentication attempts to reduce server load

[&] Which of the following describes a common component of two-factor authentication?
- Something you need
- Something you want
- Something you like
- Something you own

[&] Which technique is often used to bypass two-factor authentication?
- SQL injection
- Social engineering tactics like phishing
- Buffer overflow
- Dictionary attack

[&] Why are email-based two-factor authentication systems considered risky?
- They never expire
- They are often linked to vulnerable email accounts
- They demand Internet connectivity at all times
- They require complex setup processes