You can place an insertion point by clicking in the field or by clicking F2 keyboard shortcut. Insertion point is usually characterized by a blinking vertical line that allows you to insert a next character that you wanted.
TRUE, that is a one-sided answer. One of the biggest examples is virtually unhackable blockchains.
I think you can call it to a Network Switch, but LAN is always used device network: Hubs and Switch or maybe Connect Device or Cable.