You work as a network engineer， do you know an IPsec tunnel is negotiated within the protection of whichtype of tunnel？（）

单项选择题Forthefollowingitems，whichmanagementtopologykeepsmanagementtrafficisolatedfromActualTests.comproductiontraffic？（）

A.OTP
B.OOB
C.SAFE
D.MARS

单项选择题Whichdescriptionaboutasymmetricencryptionalgorithmsiscorrect？（）

A.They use the same key for encryption and decryption of data.
B.They use different keys for decryption but the same key for encryption of data.
C.They use different keys for encryption and decryption of data.
D.They use the same key for decryption but different keys for encryption of data.

单项选择题Forthefollowingitems，whichonecanbeusedtoauthenticatetheIPsecpeersduringIKEPhase1？（）

A.pre-shared key
B.integrity check value
C.XAUTH
D.Diffie-Hellman Nonce

单项选择题Which description is correct based on the exhibit and partial configuration？（）

A.All traffic destined for network 172.16.150.0 will be denied due to the implicit denyall.
B.All traffic from network 10.0.0.0 will be permitted.
C.Access-list 101 will prevent address spoofing from interface E0.
D.This ACL will prevent any host on the Internet from spoofing the inside network address as the sourceaddress for packets coming into the router from the Internet.

单项选择题Inabrute-forceattack，whatpercentageofthekeyspacemustanattackergenerallysearchthroughuntilheorshefindsthekeythatdecryptsthedata？（）

A.Roughly 50 percent
B.Roughly 66 percent  ActualTests.com
C.Roughly 75 percent
D.Roughly 10 percent