In Excel the sum B2 and B6 simply means that B2 and B6 Numbers are adding to get a Sum, it actually like the normal Calculator, but in Excel it helps to do the calculation of your your data simple and easy, there is no hard work.
HDLC is a synchronous Data Link layer bit-oriented protocol developed by the International Organization for Standardization (ISO).
Answer:
Multiple devices can be connected
True
yes computers are capable of serving network servers.
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