The network administrator has configured the enterprise firewall to permit port 21 to allow FTP transfers to occur from outside the enterprise. Users can connect to the FTP server that is located on the enterprise network. However, file transfers fails. Why could this be?

UDP port 21

TCP port 20

TCP port 21

UDP port 20


TCP port 20

TCP port 21

Computer Science & Information Technology

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Is there an error?

What will be an ideal response? ``` class B { public: void virtual f(); }; void B::f() {/*. . . */} ```

Computer Science & Information Technology

What is stored inside the variable value after the following line of code is executed?

``` var value = navigator.appVersion; ``` a) It stores the type of browser that the user is using. b) It stores an integer representing the version of the browser. c) It stores a string representing the version of the browser and other information. d) The navigator object does not contain an attribute named appVersion.

Computer Science & Information Technology

Wrapper class objects are mutable.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology

COGNITIVE ASSESSMENT Which of the following statements is not a safeguard against the failure of hardware?

A. surge protectors B. fault-tolerant computers C. device-tracking apps D. UPS

Computer Science & Information Technology