What should you recommend a solution to prevent internal users from sending e-mail messages with MP3 and WAV file attachments to each other?

You are the messaging engineer for your company. You have deployed four Exchange Server 2007 servers: a Mailbox server, a Hub Transport server, a Client Access server, and an Edge Transport server. The Edge Transport server is located in the perimeter network and receives all e-mail from the Internet. You need to recommend a solution to prevent internal users from sending e-mail messages with MP3 and WAV file attachments to each other. What should you recommend?

A.
On the Edge Transport server, create a transport rule that drops messages with MP3 or WAV attachments.

B.
On the Edge Transport server, add the MP3 and WAV file extensions to the attachment filter entry list.

C.
On the Hub Transport server, create a transport rule that drops messages with MP3 or WAV attachments.

D.
On the Hub Transport server, install the anti-spam agents, and add the MP3 and WAV file extensions to the
attachment filter entry list.

Explanation:
Since want to block internal file sharing, Edge servers not involved.

EMC > Organization Configuration > Hub Transport > New Transport Rule…

New-TransportRule -Name Music Share -Conditions FromScopePredicate, SenttoScopePredicate, AttachmentNameMatchesPredicate -Actions DeleteMessageAction -Exceptions -Enabled $true -Priority 1

Transport Rules are used to apply messaging policy to mail flowing thru an organization. Two rules agents are available:

The Transport Rules Agent runs on all Hub servers and can be used to control mail exchange between senders and recipients, both inside and outside the company, and enforce legal or business constraints with regard to:

1. Preventing inappropriate content.

2. Filtering confidential information.

3. Tracking or archiving email transmitted by certain people.

4. Redirecting particular messages for inspection prior to delivery.

5. Applying disclaimers to mail exiting the company.

Since Hub servers are domain members, each one periodically queries AD to retrieve the current set of transport rules and then applies such configuration to whatever mail it encounters. This insures a uniform mail policy across the entire organization.

The Edge Rules Agent runs on all Edge servers and can be utilized to protect the company from spam, viruses and DoS attacks.

Each transport rule consists of three components:

1. Condition: What attributes trigger the rule?

2. Exception: Fine tuning the rule, why shouldnt any prescribed action be applied to a certain message, after it matches a particular condition?

3. Action: How to treat a message matching all the conditions of, but none of the exceptions to, the rule.

Since the Transport Rules and the Edge Rules serve different purposes, the conditions, exceptions, and actions available to each agent vary. The former are geared toward regulation and compliance; the latter, toward shielding the organization from harmful external threats.

http://www.msexchange.org/tutorials/Exchange-2007-Transport-Rules.html?

http://technet.microsoft.com/en-us/library/aa998860.aspx