KNOWLEDGE OF COMPUTER APPLICATIONS (GENERAL STUDIES) Part-2

27. AT&T designed its first commercial modem, specifically for converting digital computer data to analog signals for transmission across its long distance network. What is the name of the modem?

1. (a) Telex
2. (b) Memex
3. (c) CompuServe
4. (d) Bell 103 dataset
5. (e) Dataphone