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An email user's account name is also known as his/her domain name

________ is the process of encoding e-mail so that only the person with a corresponding key can decode and read the message

Fill in the blank(s) with correct word

When you try to save a file, your computer gives you a warning that you do not have enough disk space. Which of the following upgrades target the warning?

a. adding more memory or RAM b. adding more disk space c. all of the above