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It is difficult to create a batch file that correctly configures SLIP. My advice is to avoid SLIP whenever possible. Also, many modern operating systems, such as Windows 2000 Server, don’t support inbound SLIP connections. Windows 2000, however, still supports outbound SLIP to allow connections to Unix machines.

Point-to-Point Protocol (PPP)

PPP is used to implement TCP/IP over point-to-point connections (for example, serial and parallel connections). It is most commonly used for remote connections to ISPs and LANs.

PPP uses the Link Control Protocol (LCP) to communicate between PPP client and host. LCP tests the link between client and PPP host and specifies PPP client configuration. PPP can support several network protocols, and because it features error checking and can run over many types of physical media, PPP has almost completely replaced SLIP. In addition, PPP can automatically configure TCP/IP and other protocol parameters. On the downside, high overhead is associated with using PPP, and it is not compatible with some older configurations.

From the technician’s standpoint, PPP is easy to configure. Once you connect to a router using PPP, the router assigns all other TCP/IP parameters. This is typically done with the Dynamic Host Configuration Protocol (DHCP). DHCP is the protocol within the TCP/IP protocol stack that is used to assign TCP/IP addressing information, including host IP address, subnet mask, and DNS configuration. This information can be assigned over a LAN connection or a dial-up connection. When you connect to an ISP, you are most likely getting your IP address from a DHCP server.

To configure a client with Windows 95/98 to dial up a remote access server and connect using PPP and Windows 9x Dial-Up Networking (DUN), follow these steps:

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