3Com Dual 56K manual Glossary

GLOSSARY 159

Modem’s two 56K lines, Multilink PPP is used to combine these two 56K connections into a virtual, single 112K connection.

NetBIOS filtering NetBIOS filtering is a LAN Modem feature that helps prevent the LAN Modem from establishing unwanted calls. This feature filters the DNS requests made by NetBIOS that inadvertently cause the LAN Modem to place a call. NetBIOS is a protocol primarily used by Windows 98, 95 and NT for local file and printer sharing.

off hook/on hook Modem operations that are the equivalent of manually lifting a phone receiver (taking it off-hook) and replacing it (going on-hook).

PAP Password Authentication Protocol. PAP is one of two PPP authentication protocols; CHAP is the other. An authentication protocol requests information to verify a valid user. PAP requests the user’s name and password for verification.

PC/TCP PC/TCP is a PC version of TCP/IP created by FTP software.

POTS Plain old telephone service.

PPPPoint-to-Point Protocol. PPP provides a standard method of transmitting data through the Internet. PPP is used for communication between a computer and an Internet Service Provider.

PPTP Point-to-Point Tunneling Protocol. PPTP is a protocol that allows for Windows 95 and Windows NT systems to establish a secure connection to a remote, private network via a locally-dialed ISP account.

router A router is a device that links two or more networks together by forwarding data packets to their proper destinations according to network addresses contained within the packet headers. Routers use address tables to perform this function and are considered “intelligent” in their ability to make decisions about the most efficient route through which to send each packet. A router often serves as the link between a LAN and WAN.

Service Provider As used by the Dual 56K LAN Modem, the term Service Provider applies to any remote dial-out destination. The LAN Modem recognizes two categories of Service Providers: Internet Service Providers (see also ISP), which provide a direct connection to the Internet, and Private Network Service Providers, which provide a direct connection to a remote Private Network, such as a corporate office LAN.

server-sideWithin a client/server network environment, server refers to the device which supplies, maintains, and/or processes information or services which are requested and by other, receiving client devices. In the context of the LAN Modem’s dial-in scenarios, server-siderefers to the LAN Modem that receives the dial-in call from the calling party. (See also client-server.)

TCP/IP Transmission Control Protocol/Internet Protocol. TCP/IP is a standardized communications protocol which allows different types of devices to communicate with each other over LANs and WANs.

UDP User Datagram Protocol. UDP converts application data messages into packets to be sent via the Internet Protocol (IP), but does not verify a successful transmission. In this way, UDP is more efficient that TCP, leaving the reliability on the application that generates the message.