CCNA Cisco Certified Network Associate (#357)

Section: Version 2.0

What is the difference between a CSU/DSU and a modem?

A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.
A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.
A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.
A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.