Which two things best describe a router's role in a WAN?

a. A multiport internetworking device used in carrier networks
b. Can support multiple telecommunications interfaces
c. Concentrates dial-in and dial-out user communications
d. Converts carrier-line frames into frames that the LAN can interpret
e. Needs a CSU/DSU or modem to connect to the POP


B,E

Computer Science & Information Technology

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