What type of connection is a dial-up line?

A dial-up line is classified as a temporary connection due to the nature of how it operates. This type of connection establishes a link to the Internet through traditional telephone lines and requires the user to dial into an Internet Service Provider (ISP) each time they want to access the Internet. The connection is made for the duration of the online session, and once the user hangs up or disconnects, the connection is terminated. This differentiates it from other types of connections, such as permanent or dedicated connections, which provide continuous and uninterrupted access to the Internet without needing to dial in each time.

In contrast, digital transmission refers to the way data is communicated (using discrete signals), which is not exclusive to dial-up lines, as they use analog signals for transmission. A permanent connection indicates a constant link, which does not apply to dial-up technology. Lastly, a fiber optic connection involves a different type of technology altogether, utilizing light signals through glass fibers, and it is not associated with the dial-up method. Hence, identifying dial-up as a temporary connection accurately reflects its operational characteristics.