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美國CPA模擬試題：Business商業壞境（5）
Which of the following statements is true regarding extranets:
a. Are extra intranets that that are used as backup intranets in emergency situations.
b. Are software programs used to monitor an organization's intranet activity.
c. Allow individuals from outside of an organization to enter certain areas of a private intranet.
d. Are an area of an organization's intranet that may be accessed by anyone from the Internet.
Explanation
Choice "c" is correct. Extranets are networks that directly link certain intranets of an organization with other organizations or individuals with which the organization may have a relationship. Extranets can enable customers, vendors, suppliers, consultants, subcontractors, and others to gain access to certain areas of a private intranet.
Choice "d" is incorrect. Extranets cannot be accessed by just any person on the Internet. In order to gain access to an extranet, permission and a password are generally needed.
Choice "a" is incorrect. Extranets are not backup intranets.
Choice "b" is incorrect. Extranets are a specific area of an intranet; extranets are not software.
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