What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard? a. 4 b. 2 c. 6 d. 3 3. none of the above

What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?
a. 4
b. 2
c. 6
d. 3
3. none of the above
by

1 Answer

Answer :

3
by

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