Typical ADSL broadband Internet access requires a username and password to be entered on end-userPC connected to the ADSL modem in order for the end user to gain access to the Internet.if a Cisco ADSLrouter is used instead of an ADSL modem，what functionality is required on the Cisco ADSL router so theend-user connected to the Cisco ADSL router can access the Internet without entering a username andpassword？（）A、PPPoAB、Route Bridge Encapsulation（RBE）C、PPPoE clientD、Integrated Routing and Bridging（IRB）E、AAA
Typical ADSL broadband Internet access requires a username and password to be entered on end-userPC connected to the ADSL modem in order for the end user to gain access to the Internet.if a Cisco ADSLrouter is used instead of an ADSL modem，what functionality is required on the Cisco ADSL router so theend-user connected to the Cisco ADSL router can access the Internet without entering a username andpassword？（）
- A、PPPoA
- B、Route Bridge Encapsulation（RBE）
- C、PPPoE client
- D、Integrated Routing and Bridging（IRB）
- E、AAA
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