单项选择题
A.An IPSec tunnel cannot be established between Router A and Router B
B.The Linksys Firewall router does not support PPPoE
C.Destination addresses defined in RFC 1918 are not supported within an IPSec tunnel
D.The phone and PC behind Router A will not be able to connect to a host on 192.168.1.0/24
单项选择题 Refer to the exhibit. Easy VPN operates in two modes. The exhibit represents network extension mode. Choose the best reason for using this mode.（）
多项选择题 WhataredisadvantagesofNetworkAddressTranslationTransparency?（）
单项选择题 WhichisnotareasonthatInternetServiceProvidersprefertousePPPoverEthernet(PPoE)?（）
