__________ mode is suitable for parallel operation. Because there is no chaining, multiple blocks can be encrypted or decrypted simultaneously. Unlike CTR mode, this mode includes a nonce as well as a counter.

The CPU's control unit retrieves the next instruction in a sequence of program instructions from main memory in the __________ stage.

a. fetch b. decode c. execute d. portability

Network problems are often combinations of hardware, software and operating system problems.

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