The WAN infrastructure for analog dial-up is usually the ____.
A) PSTN
B) POST
C) ISDN
D) DSL

Question

Quizplus · Accepted Answer

PSTN (Public Switched Telephone Network) is the traditional telecommunications infrastructure used for analog dial-up connections. It uses copper phone lines to carry voice and data signals over a circuit-switched network. POST (Power On Self Test) is a computer diagnostic test, not a WAN infrastructure. ISDN (Integrated Services Digital Network) and DSL (Digital Subscriber Line) are digital technologies and not typically associated with analog dial-up.

The WAN Infrastructure for Analog Dial-Up Is Usually the ____