Ban
For when you need it.
This, while well intentioned, is pretty weak in describing computers and their security flaws. Millions of chips? Sigh. There is RAM / memory and disk storage is some variety. Then there are numerous devices that have chips / drivers and low level access to the machine. Backdoors in a range of devices via drivers or firmware running on the chips or similar is where many exploits reside. But the software and activity exploited by malware and such is the most common method. There are indeed a sad number of exploits and holes in most connected devices and difficult to guard against them