Answer: a. RADIUS
Explanation:
RADIUS as developed with the idea of allowing its users or clients to be able to authenticate to a dial-in access server. So basically it is a client server protocol and he client here is the firebox and the server is the RADIUS server.
The authentication mechanism start by user who sends a message to the RADIUS server. Then the RADIUS server upon receiving the message accept or denies it. It accepts if the client is configured to the server.
A large amount of additional information can be sent by the RADIUS server in its Access-Accept messages with users so we can say that RADIUS is uitable for what are called "high-volume service control applications" such as dial-in access to a corporate network.
Explanation:
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The answer is called bloatware. This is unneeded files that are actually on the computers which are already there even if it's new. It doesn't have any essential function and sometimes is a trial version. The application also adds up space which limits your free space storage. In other words, because it has no significant tasks to handle it is unnecessary, but it only serves as an additional profit to the company once it is purchased by the buyer.
Bloatware may also come especially in adware where a lot of extension applications are sometimes automatically installed after it is allowed to operate in just a click. The only solution for a bloatware is to uninstall it. .