Firewalls can't protect very well against things like viruses or malicious software (malware). There are too many ways of encoding binary files for transfer over networks, and too many different architectures and viruses to try to search for them all. In other words, a firewall cannot replace security-consciousness on the part of your users. In general, a firewall cannot protect against a data-driven attack--attacks in which something is mailed or copied to an internal host where it is then executed.

Alternate Answer:
Properly configured firewalls can limit the propagation of worms - a form of malware.  Typically, firewalls are edge or parameter devices (separates network zones) and most viruses and malware targets end points (user workstations and servers).

Multiple processes must agree that they will share the same connection, where every parameter is the same, including the security settings.  The connection string must be identical.

Security can be handled at the machine, domain, or sharepoint level.

assembly and module.

COM Interop, Transaction, Visual Designer Component Builder

By default, all sites are created private.If you want your site to be a public Web site, enable
anonymous access for the entire site. Then you can give out your URL to anybody in your
business card, e-mail or any other marketing material. The URL for your Web site will be:
http:// yoursitename.wss.bcentral.com
Hence, please take special care to name your site.
These Web sites are ideal for information and knowledge intensive sites and/or sites where you
need to have shared Web workspace.
Remember: Under each parent Web site, you can create up to 10 sub-sites each with unique
permissions, settings and security rights