In what order did the following technologies come to the market. (Label the following 1-3 with 1 being the oldest)
a. ❌ DSL, which did not create a point-to-point link and could not support PPP and CHAP.
b. ❌ Analog modems for dial-up, which could use PPP and CHAP.
c. ❌ ISDN for dial-up, which could use PPP and CHAP.
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