1. What happens if two CPUs in a multiprocessor attempt to access exactly the same word of memory at exactly the same instant?

2. Why is there a limit on cable length in an Ethernet network?

3. In the discussion of how URLs are processed by a browser, it was stated that connections are made to port 80. Why?

4. When multiple processes need access to data, in what way is object-based access better than shared-memory?

5. When a browser fetches a Web page, it first makes a TCP connection to get the text the page (in the HTML language). Then it closes the connection and examines the page. If there are figures or icons, then it makes a separate TCP connection to fetch each one. Suggest two alternative designs to improve performance here