6. The X.25 standard specifies a _________.
(a) data bit rate.
(b) DTE/DCE interface.
(c) technique for dial access.
(d) technique for start stop data.
7. In X.25 defines the protocols from :
(a) Layer 2 to Layer 3
(b) Layer 1 to Layer 2
(c) Layer 1 to Layer 3
(d) Layer 3 to Layer 2
8. The access methods and protocols for GSM may be from :
(a) X.25
(b) X.32
(c) Both a & b
(d) None of these
9. X.25, it was developed for computer connections used for :
(a) Terminal connection
(b) Timesharing connection
(c) Both a & b
(d) None of these
10. What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard ?
(a) 2
(b) 3
(c) 4
(d) 6
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