This chapter explains how to use Red Hat Enterprise Linux or Fedora Core to connect to the Internet via a telephone dialup, Integrated Services Digital Network (ISDN), Digital Subscriber Line (DSL), Ethernet, or wireless connection. First, it provides an overview of networking and explains how to use the Network Administration Tool, an X-based program that makes it easy to connect to the Internet via an Internet service provider (ISP). The chapter also explains how to use wvdial, a program that can establish a telephone dialup connection to the Internet but doesn't require X. Next, the chapter describes several popular network client applications available under Linux, including the Mozilla web browser, the Ximian Evolution email client, and a graphical FTP client. Finally, the chapter gives some tips on how to configure Linux to work with your cable or DSL modem if the Network Administration Tool is unable to do so.