“Signal” is a varying wave over time. The waves travel through the air, ultimately pushing on the sensors recreate the signal. The signal goes from one medium to the next, keeping its basic curvy shape.
When the signal digitalised it is easy the manipulate it.
To be on the internet, a computer needs an IP address.
Every computer on the internet has an IP address. IP addr is exactly 4 bytes (4 1-byte numbers) Left part encodes “neighborhood” on internet.
Although Wi Fi surround the enviroments as a energy field, it’s not visible to a eye. It is shared radio channel and each computer listen the channel. Cell phones,televisions and radios also do use the radio waves. However their (the waves) unique height, power (amplitude), distance from each other, and their travelling speed give them a clean transmission that cannot interrupted by other signals. For example, they are longer than microwaves and shorter than radio waves. Wifi routers are antenna. Their ability is sending the data over multiple frequencies all at the same time.
Radio frequency energy is part of the electromagnetic spectrum that includes visible light and x rays. Heinrich Hertz is a German physicist discovered radio waves in 1888 by providing the existence of electromagnetic waves theorized by James Clerk Maxwell’s electromagnetic theory of light.
Persistent Storage stores bytes as a magnetic pattern on a spinning disk. It preserves bytes even when not powered. A flash drive is faster and uses less power than a hard disk.
Random Access Memory
RAM is a Temporary, working storage for bytes. When power goes out, RAM’s state is gone. Ram store both data, which is just the passive information, and code that defines the active plan followed by the computer.