99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

多項(xiàng)選擇題

IPSec VPN is a widely-acknowledged solution for enterprise network. Which three IPsec VPNstatements are true?()

A.IKE keepalives are unidirectional and sent every ten seconds
B.IPsec uses the Encapsulating Security Protocol (ESP) or the Authentication Header (AH)protocol for exchanging keys
C.To establish IKE SA, main mode utilizes six packets while aggressive mode utilizes only threepackets
D.IKE uses the Diffie-Hellman algorithm to generate symmetrical keys to be used by IPsec peers

微信掃碼免費(fèi)搜題