单项选择题
For a router connected to two ISPs for redundancy， using IPSLA and static routing， how would you configure uRPF on the uplink interface？（）
A.ip verify unicast source reachable-via any B.ip verify unicast reverse-path C.ip verify unicast reverse-path loose D.ip verify unicast reverse-path strict
多项选择题 Voicequalityisbadduetohighdelayandjitteronalink.Whichtwoactionswillimprovethequalityofvoicecalls？（）
单项选择题 WhatactionwillaBGProutereflectortakewhenitreceivesaprefixmarkedwiththecommunityattributeNOADVERTISEfromaclientpeer？（）
多项选择题 WhichtwoOSPFLSAtypesarenewinOSPFversion3？（）
