Which of the following statements concerning intranets is incorrect?
　　a. A firewall is needed to ensure that unauthorized Internet users cannot access an organization's intranet.
　　b. An intranet connects geographically separate LANs within an organization.
　　c. An intranet web browser is different from an Internet web browser.
　　d. In order to gain access to an intranet, a user generally must enter a password.
　　Explanation
　　Choice "c" is correct. The same web browser can be used for both intranets and the Internet making choice "c" an incorrect statement.
　　Choice "b" is incorrect because this statement is correct.
　　Choice "a" is incorrect because this statement is correct.
　　Choice "d" is incorrect because this statement is correct.