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Hubs are like the postmaster taking every piece of

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Hubs are like the postmaster taking every piece of mail to every address, asking the resident to pick out the ones addressed to him/her. A switch is like the mail being pre-sorted and then the carrier only brings you what is addressed to you. Samba? As explained earlier, Samba can help Windows and Unix machines coexist in the same network. However, there are some specific reasons why you might want to set up a Samba server on your network: You don't want to pay for - or can't afford - a full-fledged Windows NT server, yet you still need the functionality that one provides.
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You want to provide a common area for data or user directories in order to transition from a Windows server to a Unix one, or vice versa. You want to be able to share printers across both Windows and Unix workstations. You want to be able to access NT files from a Unix server. What's NFS? The NFS (Network File System) program enables you to treat files on another computer in more or less the same way you treat files on your own computer. You may want to use NFS for several reasons: Often you have a bunch of similar computers scattered around, all running more or less the same programs. Rather than load every program on every computer, the system administrator loads one copy of everything on one computer (the server) so that all the other computers (the clients) can share the programs. Centralizing the files on a server makes backup and administration easier. It's much easier to administer one disk of 4,000 megabytes than to administer 10 disks of 400 megabytes apiece. It's also easier to back up everything because everything is all in one place rather than spread around on a dozen machines. Another use of NFS is to make a bunch of workstations function as a shared time-sharing system. It is reasonably straightforward to set up a bunch of workstations so that you can sit down at any one of them, log in, and use the same set of files regardless of where on the network they physically reside. This capability is a great convenience. Also, by using programs such as ssh, you can log in to another machine on the network and work from that machine (which is handy if the other machine is faster than yours or has some special feature you want to use). In heterogeneous networks, NFS is a fancy term for networks with different kinds of computers. NFS is available for all sorts of computers, from PCs to mainframes.
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