________ are similar to outline levels and are identified by bullet size, indentation, and text size

Which of the following best defines a fault-tolerant network? a. A fault-tolerant network supports users who have different viewpoints. b. A fault-tolerant network limits the impact of hardware or software failures and recovers quickly when a failure occurs

c. A fault-tolerant network can expand quickly to support new users and applications withoutcausing errors for existing users. d. A fault-tolerant network is built to withstand earthquakes.

Answer the following statements true (T) or false (F)

1. Given the potential vulnerability of DES to a brute-force attack, an alternative has been found. 2. A number of Internet based applications have adopted two-key 3DES, including PGP and S/MIME. 3. The sender is the only one who needs to know an initialization vector. 4. A typical application of Output Feedback mode is stream oriented transmission over noisy channel, such as satellite communication. 5. Cipher Feedback (CFB) is used for the secure transmission of single values.