多项选择题
Which statements are true concerning NAT？ （）
A. NAT provides 1 to manyaddress mapping. B. NAT provides 1 to 1 address mapping. C. NAT is only useful forTCP/UDP and ICMP traffic. D. NAT can be used for all IP traffic.
多项选择题 WhattechnologiesareincludedinAnti-X？（）
单项选择题 CSAprotectsyourhostby：（）
多项选择题 ChoosethemostcorrectstatementsaboutSMTP/ESMTP.（）
