单项选择题
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
单项选择题 WhatistheroleofForwardingEquivalenceClass（FEC）inMPLS？（）
单项选择题 TheIPv6addressFE80：：656：78FF：FE9A：BCDEiswhattypeofaddress？（）
单项选择题 Howmanytokenbucketsareneededtosupportamulti-actionspolicerthatmetersconforming，exceedingandviolatingtraffic？（）
