Option 1: This option describes a wireless computer network, not cloud computing. Cloud computing refers to the delivery of computing services (resources, software, and information) over the internet.

Option 2: This option describes various ways of telecommunications technology but does not accurately define cloud computing. Cloud computing is about providing shared resources and services over the internet, not just data transfer.

Option 3: This option defines a short-range wireless connection technology like Bluetooth, but it is not an accurate definition of cloud computing. Cloud computing is about accessing shared resources and services over the internet, not just wireless connections between devices.

Option 4: This is the correct answer. Cloud computing is an internet-based service where shared resources, software, and information are provided to computers and other devices on demand. It involves accessing computing services over the internet without the need for local infrastructure or physical hardware. The cloud provides scalability, flexibility, and ease of access to computing resources, making it a popular choice for businesses and individuals.

Overall, option 4 provides the most accurate description of what cloud computing refers to.