A．authenticityB．IPSecC．confidentialityD．integrity

下面哪一项不是VPN协议标准：（)A.L2TPB.ipsecC.TACACS＋D.PPTP

（51）以下属于身份认证协议的是A）S／KeyB）IPSecC）S／MIMED）SSL

【C4】A．interactB．communicateC．cooperateD．integrate

Paragraph 3________ A.The residents’ integration

Paragraph 4________A.The residents’ integration b

Paragraph 5________A.The residents’ integration b