The term _____refers to businesses that conduct transactions online, including large retail websites that sell products to consumers.?

Which of the following ensures that messages originate from their advertised source?

A. Sender authentication B. Message integrity C. Message confidentiality D. Message availability

Adding 1 to a pointer causes the pointer to point to the ____.

A. next element of the type pointed to B. first element of the type pointed to C. next byte D. next block