Which two devices are needed when a digital leased line is used to provide a connection between the customer and the service provider? (Choose two.)
- dialup modem
- access server
- Layer 2 switch
Explanation: Digital leased lines require a channel service unit (CSU) and a data service unit (DSU). An access server concentrates dialup modem dial-in and dial-out user communications. Dialup modems are used to temporarily enable the use of analog telephone lines for digital data communications. A Layer 2 switch is used to connect a LAN.
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