ModemHelp.Net FAQs

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Modem Basics	Modem Protocols
What happens when I dial up and connect? What is a modem? What does it do? What is a COM port? What is an IRQ? What is "serial data"? What is "parallel data"? What does 8-N-1 mean? What is a UART? How does it work? What is a FIFO buffer? How does it work? What is a DSP?	What is a modem "handshake"? What are modulation protocols? What is flow control? RTS/CTS? Xon/Xoff? What is error correction? What is data compression? What's V.90? How does 56K work? What is modem "firmware"? How do I tell what version I have? What is retraining? What is fallback?
Authentication and Networking	Windows Drivers/Settings
What is PAP? What is CHAP? What is Realm authentication? What is TCP/IP? How does it work? What is "local host"? What is 127.0.0.1? What is PPP? What is SLIP? What is IPX/SPX? What is NetBEUI? What is DNS? How does it work? What is WINS? What does disabling it do? What is DHCP? How does it work?	What is a modem driver? What is TAPI? What is a winmodem? What does 'telephon.ini' do? What are MTU, TTL, and RWIN?
High Speed Info	General ISP Info
What is multi-linking? Can we do that? What is a "shotgun" modem? Can we do that? What about ISDN? What is a TA? What's a SPID? What is ADSL? How does it work? What is a "cable modem"? How does it work?	What is a PoP, really?