Netscape supports memory and disk cache to improve performance and reduce network traffic. When you bring a page from the network, information is stored in both caches. Netscape retrieves a page from the memory cache more quickly than from the disk cache, though retrieving from the disk cache is still faster than fetching from the network.

The disk cache has the advantage of persistence. When you exit a session (quit the Netscape application), the memory cache is emptied, but the disk cache is maintained (and takes up space on your hard disk).