试题详情单项选择题Which protocol is an open standard protocol frame work that is commonly used in VPNs,to provid secureend-to-end communication?()A、L2TPB、IPsecC、PPTPD、RSA正确答案:B答案解析:关注下方微信公众号,在线模考后查看热门试题Refer to tA branch On a rouAs a Network EngineeCSA protectsThe enable secret coWhich two̳Host 1 is trying to What command visualiRefer to tHow does Which of Refer to tWhen usingQ以下哪些路由表项要由网络管理员手动配置(哪两种说法正确描述了命令 iIn PPPoA Which type of EIGRP R1, an ABR between A network&ensp