The ERX Edge Router is configured for PPP over Ethernet without using VLAN tagging. How many PPP over Ethernet major interfaces can be configured per port?（）

单项选择题Which process occurs first during the Ethernet Discovery Stage process for a PPPoE service offering?（）

A.The ERX router sends an Active Discovery Offer message.
B.The ERX router sends an Active Discovery Initiation message.
C.The customer device sends an Active Discovery Offer message.
D.The customer device sends an Active Discovery Initiation message

单项选择题A user is connected on a DSL line and is using a PPP over Ethernet service. Which network device encapsulates the datagram inside of an ATM header?（）

A.DSLAM
B.DSL modem
C.ERX Edge Router
D.customer workstation

多项选择题What are the two well-known UDP ports used by RADIUS accounting servers?（）

A.1645
B.1646
C.1812
D.1813

单项选择题What is a method by which an IP interface can be assigned to a virtual router in a PPP over ATM environment?（）

A.policy list
B.RADIUS VSA
C.classifier ACL
D.LCP negotiation

单项选择题In a PPP over ATM service offering, what is a valid method for assigning an address to the ERX Edge Router?（）

A.DHCP assigned addresses
B.RADIUS assigned addresses
C.IP numbered with a loopback reference
D.IP unnumbered with a loopback reference