POTS
Plain Old Telephone Service
The traditional analog telephone network.
Plain Old Telephone Service refers to the traditional analog voice network carried over copper lines, also known as the public switched telephone network at the subscriber level. In security contexts it appears as an out-of-band channel for modems, alarm systems, and fax, and as a fallback when IP connectivity fails. Its analog nature makes it resistant to certain IP-based attacks but vulnerable to physical line tapping. It is increasingly displaced by VoIP, which introduces different network-based threats.
Looking POTS up is step one. Getting tested on it is step two.
A free account opens all 4 Domain 1 objectives, 271 exam-style questions with a lesson and a lab on each, a placement check that skips what you already know, and a dated plan. No card.
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