Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...

Internet Access Methods 119
with the carrier. There is no dial tone and therefore you will not be able
to dial out. Answer C is incorrect because the modem settings are not the
root cause of the problem. Answer D is incorrect because the Windows
operating system is installed on a PC, which has nothing to do with the
absence of dial tone.
5. Correct answer and explanation: D. Both use dialing, but dial-up is based
on the telephone system and use analog lines, whereas ISDN and DSL are
both digital.
Incorrect answers and explanations: A, B, and C. Answer A is incorrect
because dial-up is not based on the WAN but rather telephone systems.
Answer B is incorrect because both use dialing and ISDN and DSL are both
digital. Answer C is incorrect because dial-up is based on the telephone
system and use analog lines.