X.25 Protocol – 1 – 3

11. X.25 is a :

(a) Protocol
(b) Technology
(c) Data service
(d) Telephone service

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

12. X.25 protocol was recommended by CCITT in :

(a) 1975
(b) 1976
(c) 1977
(d) 1978

Answer
Answer : (b)

Explanation
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13. X.25 protocol exchanged the data control information between :

(a) A node
(b) A user device
(c) Both a & b
(d) None of these

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

14. The channel grouping in X.25 are known as :

(a) Logical channel number(LCN)
(b) Logical channel group number(LCGN)
(c) Both a & b
(d) None of these

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

15. Maximum packet sizes in X.25 vary from :

(a) 32 bytes to 64 bytes
(b) 64 bytes to 128 bytes
(c) 64 bytes to 2056 bytes
(d) 64 bytes to 4096 bytes

Answer
Answer : (d)

Explanation
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