Which protocol is an open standard protocol framework that is commonly used in VPNs,to provid secure end-to-end communication?

admin2019-04-08  1

问题 Which protocol is an open standard protocol framework that is commonly used in VPNs,to provid secure end-to-end communication?

选项 A、        L2TP
B、        IPsec
C、        PPTP
D、        RSA

答案B

解析
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