Computer Networking
Which of the following best illustrates the default subnet mask for a class A,B, and C Network?

255.255.0.0, 255.255.255.0, 255.255.255.255
None of these
255.255.255.0, 255.255.0.0, 255.0.0.0
0.0.0.0, 0.0.0.1, 0.0.1.1
255.0.0.0, 255.255.0.0, 255.255.255.0

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Computer Networking
RS-232-G

requires only 7 pin out of 25 in order to transmit digital data over public telephone lines
is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment
None of these
specifies only the mechanical characteristics of an interface by providing a 25-pin connector
is an interface between two data circuit terminating equipment as examplified by a local and remote modem

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