Final answer:
The correct answer is b) ALU. ALU is not a network protocol. TCP/IP, HTTP, and FTP are network protocols.
Step-by-step explanation:
The correct answer to the question is b) ALU. ALU stands for Arithmetic Logic Unit, which is a component of a computer's central processing unit (CPU) responsible for performing arithmetic and logical operations. It is not a network protocol.
TCP/IP, HTTP, and FTP are all examples of network protocols. TCP/IP is a suite of protocols used for communication between computers on the internet. HTTP is the protocol used for transmitting hypertext over the internet, commonly used for accessing web pages. FTP is the protocol used for transferring files over the internet.