Operating System (OS)
Link encryption

can not be used in a public network
is used only to debug
None of these
is less secure than end-to-end encryption
is more secure than end-to-end encryption

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Operating System (OS)
Operating system

None of these
All of these
provides a layered, user-friendly interface
enables the programmer to draw a flowchart
links a program with the subroutines it references

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