To make the site more user-friendly and address the issue of error pages popping up due to deleted pages, the best option would be:

C. Create a custom error page with a link back to the main site.

This option is the best choice because it provides a user-friendly experience when a user encounters a deleted page or a broken link. By creating a custom error page, you can include a clear message explaining that the page the user is trying to access is no longer available. Additionally, including a link back to the main site allows the user to easily navigate back to the main site and continue their browsing experience.

Now let's go through each option and explain why it is right or wrong:

A. Create a custom pop-up window to redirect the user: This option is not the best choice because using pop-up windows can be intrusive and disruptive to the user experience. It may also cause frustration for users if they encounter multiple pop-up windows when trying to access deleted pages.

B. Reinstall the missing pages: This option may not be feasible or practical, especially if there are a large number of missing pages. Reinstalling the missing pages would require identifying and locating each missing page and then restoring them, which can be time-consuming and may not be a permanent solution if the issue continues to occur.

C. Create a custom error page with a link back to the main site: This option is the best choice because it provides a user-friendly experience when encountering deleted pages or broken links. By creating a custom error page, you can inform the user about the issue and provide a clear message, along with a link back to the main site, allowing them to easily navigate back to the main site and continue their browsing experience.

D. Redirect the broken links to another page on the site: This option may not be the best choice because redirecting broken links to another page on the site without informing the user about the issue can lead to confusion and frustration. It is important to provide clear communication to the user when encountering deleted pages or broken links.

The Answer is: C. Create a custom error page with a link back to the main site.

To solve this problem, the user needs to have basic knowledge of networking and troubleshooting. The user should check the possible causes of the issue and try to eliminate each cause until the correct one is identified.

In this scenario, the user is unable to communicate with a host on a different department of the company but has no issue communicating with others on the same subnet. Other hosts on the subnet can also reach remote hosts. Based on this information, we can eliminate options A and B as incorrect subnet masks would affect all communication outside the subnet, not just one specific host.

Option D can also be eliminated as the WINS server is not used for basic network communication, and the issue is only with one specific host.

Therefore, the correct answer is:

C. Incorrect default gateway on your computer

This option is the most likely cause of the issue as the default gateway is responsible for forwarding traffic to remote networks. If the default gateway is not configured correctly, the traffic will not be directed to the correct destination, resulting in the inability to communicate with remote hosts.

To answer this question, the user needs to understand the purpose of the security log in Windows 2000 server.

The security log in Windows 2000 server is primarily used for auditing purposes. It records events related to security and authentication, such as successful or failed logon attempts, changes to user accounts and permissions, and other security-related events.

Therefore, the correct option is:

The Answer is: C. auditing.