The changes in 2.0 did not stop there. The memory-management code
was substantially improved to provide a unified cache for file-system data
independent of the caching of block devices. As a result of this change, the
kernel offered greatly increased file-system and virtual memory performance.
For the first time, file-system caching was extended to networked file systems,
and writable memory-mapped regions also were supported.
The 2.0 kernel also included much improved TCP /IP performance, and a
number of new networking protocols were added, including Apple Talk, AX.25
an'lateur radio networking, and ISDN support. The ability to mount remote
netware and SMB (Microsoft LanManager) network volumes was added.