Final answer:
Support websites that use Web 2.0 technologies differ from earlier support websites primarily in their emphasis on collaboration and communication among users.
Step-by-step explanation:
Support websites that use Web 2.0 technologies differ from earlier support websites primarily in an emphasis on collaboration and communication among users. Web 2.0 technologies focus on user participation and interaction, allowing users to engage with each other and contribute to the content of the website. This is in contrast to earlier support websites, which may have focused more on providing static information or FAQs. Examples of Web 2.0 support websites include community forums, social media platforms, and crowd-sourcing platforms.