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Objective 3.3
Implement Secure Access Between Private Networks
16-23
B. Incorrect: The filter list for a tunnel mode IPSec policy is no different
from the
list for a transport mode policy. You only have to specify port numbers if
you want
to filter traffic based on the applications generating the traffic.
C. Correct: All IPSec policies must specify the algorithm that the system
will use to
encrypt the protected data.
D. Incorrect: IPSec in tunnel mode is an arrangement between the two routers
functioning as endpoints for the tunnel. The only requirement for the
clients and
servers making use of the tunnel is that they have access to the routers.
4.
Correct Answers: D
A. Incorrect: The Kerberos protocol is the default authentication method for
Active
Directory networks. However, as these two networks are running completely
sep-
arate Active Directory installations, clients on one network cannot be
authenti-
cated by servers on the other.
B. Incorrect: Because neither network has a PKI in place, the use of digital
certifi-
cates for IPSec authentication would not be practical.
C. Incorrect: Smart cards rely on digital certificates, which are stored on
the cards.
Without a PKI in place, using smart cards for IPSec authentication would not
be
practical.
D. Correct: Using a key that you have supplied to the administrators of the
other
network beforehand, IPSec systems can authenticate each other without the
need
for additional infrastructure.
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