多项选择题
Which of the following are common issues that should be considered when establishing ortroubleshooting site-to-site VPNs？（Choose all that apply.）（）
A.User authentication B.Overlapping IP address space C.GRE or IPsec configuration D.MTU size E.VPN client software F.Authentication server configured ly
多项选择题 WhichofthefollowingareTACACS+characteristics？（Chooseallthatapply.）（）
单项选择题 Whichofthefollowingcommandswillremovealldynamicentriesforarouter’sNATtable？（）
多项选择题 Whichofthefollowingarecorrectstatements？（）
