A.两种安全机制都可以认证和加密
B.两种机制分别是AH和ESP
C.AH提供认证,所有数据在传输时可以明文传输
D.AH无法穿越NAT
A.NG<0,△S>0,△H<0
B.AG<0,AS<0,△H<0
C.△G>0,△S>0,AH> 0
D.△G>0,△S<0,AH< 0
Max: You should go to pubs, or join a club.
Peter: But... English people never speak to me.
Max: Ah! You should speak to them first.
Peter: (59)
A.200.1
B.215
C.175.8
D.230.1