IPsec ____ mode encrypts only the data portion (payload) of each packet yet leaves the header unencrypted.

A software package that includes a text editor, compiler, debugger, and assorted utilities for creating, testing, and running software is called

A) a low-level programming language. B) a high-level programming language. C) a software utility package (SUP). D) an operating system. E) none of the above.

This vector function returns true if the vector has no elements.

a. has_no_elements b. null_size c. empty d. is_empty