ocr: Packet On the internet data is broken up into small chunks called packets. Password A code used to gain access to a system. Peripheral An external hardware component (printer, disk, etc.) that is externally connected to a computer and serves it. Ping Software that allows a user to check if a connection exists between his/her computer and another computer. Plug-in An application written in order to broaden the Web browser's features. After you download the plug-in to your computer and place it in the plug-in folder, your Web browser will be able to offer you additional features. For example, af ...