Which of the following can be installed and configured to prevent suspicious emails from entering
the user’s network?

A.
Kerberos

B.
Single sign-on (SSO)

C.
TCP/IP protocol

D.
Microsoft Forefront and Threat Management Gateway

Explanation:
To prevent suspicious emails from entering the network, it is required to install Microsoft Forefront
and Threat Management Gateway and configure it so that it can block any malicious emails.
Exchange server has many spam filtering tools but Forefront and TMG are additional security
measures used for enhancing the protection of the system.

Answer B is incorrect. Single sign-on (SSO) is defined as a mechanism in which a single action of user
authentication and authorization is used to allow a user to access all computers and systems where
he got a access permission, without entering passwords for multiple times.

Answer A is incorrect. Kerberos is defined as a secure method used for authenticating a request for
a service in a computer network.

Answer C is incorrect. TCP/IP protocol is used to define the rule computers are required to follow
for communicating with each other over the internet.