Communication Between Two Computers

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Q: Gordon is a project engineer for a company that uses Windows XP machines. Gordon’s computer does not use the default gateway; he is able to connect to the Internet, but cannot use e-mail unless he uses the company’s intranet. Which of the below is potentially the reason for this situation?

a. Protocols other than TCP/IP are being used.

b. An IP packet filter is installed.

c. The router is blocking Gordon’s machine.

d. Gordon may be using a proxy server.

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