单项选择题
A.used to verify the identity of the peer
B.used between the initiator and the responder to establish a basic security policy
C.used to establish a symmetric shared key via a public key exchange process
D.used for asymmetric public key encryption
单项选择题 WhichtypeofMACaddressisdynamicallylearnedbyaswitchportandthenaddedtotheswitch’srunningconfiguration？（）
单项选择题 AsanetworkengineeratCertpaper.com，youareresponsibleforCertpapernetwork.WhichwillbenecessarilytakenintoconsiderationwhenimplementingSyslogginginyournetwork？（）
单项选择题 Refer to the exhibit. Based on the VPN connection shown， which statement is true？（）