Final answer:
A member firm's website that doesn't require a password is a public forum due to its widespread accessibility.
Step-by-step explanation:
A website maintained by a member firm that does not require a password for access is considered to be a public forum. This is because the accessibility and universal availability of the information on the website to the public qualifies it as a public forum. A password protected site would fall into other categories like private or protected communication channels.
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