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Chapter 20. Networking Mix and Match > Internetworking with DOS and OS/2

Internetworking with DOS and OS/2

DOS and IBM’s OS/2 operating system use the same fundamental networking functions as Windows. This fact shouldn’t be a surprise, as Microsoft developed the networking software used on the original IBM PC, and its relationship with IBM lasted through the release of the first few versions of OS/2. IBM’s LAN Server evolved directly from Microsoft’s original LAN Manager product, whose name still appears here and there in Windows XP. You’ll see the letters LM and the phrase LanMan used in some Windows networking components.

However, Microsoft has dropped support for the NetBEUI transport protocol on which the old DOS and OS/2 networking software depended. Ostensibly this is due to NetBEUI’s archaic nature (although one might speculate that it’s to force the remaining OS/2 holdouts to give up, or as retaliation for IBM’s support for Linux). Whatever the reason, this is bad news for those who still depend on OS/2 or DOS-based computers.


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