Uniform Resource Locators (URL's) can address many types of data and network protocols. SiteSurfer supports http, file, gopher, and ftp protocols. The file protocol is a special case, as it addresses files on the local filesystem, rather than across the network on a server.
The Protocols notebook entry lets you disable any of these protocols if you do not wish to support them in the SiteSurfer applet.
Warning: The Java 1.1 runtime environment has a bug that causes FTP links to hang the program when the computer on which it is running has multiple IP addresses. This can happen, for instance, when it is on a LAN and connected to the Internet via a dialup server.