Answer:
to send an email to someone without revealing that person’s email address to others on the distribution list
Explanation:
BAM
Answer:
C: The protocols of the Internet are open and used by all devices connected to the network
Explanation: Hope this helps.
There are billions of devices connected to the Internet, and hundreds of different kinds of devices: laptops, tablets, phones, refrigerators, handheld credit card readers, and so on. Protocols (standards) ensure that the variety of devices interact with each other smoothly. There are a lot of protocols! The Internet was designed with several layers of abstraction that sort the protocols according to what part of the process they support.
The answer to this question is true
Answer:
a. select * from R, S where R.C = S.C (+); (R left outer join S)
Explanation:
In SQL, left outer join of two tables R and S joined on a common column C means that all rows of R are included in the result including those rows for which value of R.C is null. On the contrary, right outer join of two tables R and S joined on a common column C means that all rows of S are included in the result including those rows for which value of S.C is null. As per the question our requirement is the former. So option a is correct.
