Computer Networking
The first step in troubleshooting many problems is to verify which of the following?

The subnet mask is valid
None of these
The WINS server is running
The BDC is operable
TCP/IP is installed correctly on the client

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Computer Networking
RS-449/442-A/423-A is

None of these
a check bit appended to an array of binary digits to make the sum of the all the binary digits
a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression the resulting expression will not conform to the rules of construction and
the ratio of the number of data units in error to the total number of data units
a set of physical layer standards developed by EIA and intended to replace RS-232-

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