Noise is not a component of a communication system, but rather an unwanted disturbance that can interfere with the transmission of information.

Digitization is the process of converting an analog signal into a digital signal, which involves sampling, quantization, and encoding.

Pulse Code Modulation (PCM) is a digital modulation technique, while Amplitude Modulation (AM), Frequency Modulation (FM), and Phase Modulation (PM) are analog modulation techniques.

Shannon Capacity is the maximum data rate that can be transmitted over a channel with a given bandwidth, as determined by Claude Shannon's mathematical theory of communication.

Mesh is not a type of network topology, but rather a type of network architecture in which each node is connected to every other node.

Packetization is the process of dividing a message into smaller units for transmission, also known as packets.

Checksum is not a type of error control technique, but rather a method for detecting errors in data transmission.

Demodulation is the process of converting a digital signal into an analog signal, which is the opposite of modulation.

Code Division Multiplexing (CDM) is not a type of multiplexing, but rather a spread spectrum technique used in wireless communication.

Addressing is the process of assigning a unique address to each device on a network, which allows for the identification and communication between devices.

Hypertext Transfer Protocol (HTTP) is not a type of network protocol, but rather an application protocol used for transferring web pages and files over the World Wide Web.

Handshake is the process of establishing a connection between two devices on a network, which involves the exchange of control information to negotiate the parameters of the connection.

Spam is not a type of network security threat, but rather an unwanted electronic message, typically advertising a product or service.

Encryption is the process of protecting data from unauthorized access or modification by converting it into a form that is unintelligible without the appropriate key.

Satellite is not a type of wireless communication technology, but rather a type of communication system that uses satellites to transmit and receive signals.