Servers workstations and hosts

Servers, workstations, and hosts are components of any networking environment. Servers are computers that run network operating systems, workstations are personal computers that are connected to a network, and hosts are network devices that have a TCP/IP address.

Servers (example: Computer or PC with Linux Server Installed)
The NOS turns a personal computer into a network server. Servers on most networks
are computers that have been optimized to run a network operating system. They might include multiple processors, redundant power supplies, and heavy-duty cooling systems, and they will have significantly more RAM and hard drive space than other machines in the office.
Some network operating systems need a dedicated server, that is, the computer running the NOS cannot be used for any other purpose. It is strictly a server. This is the case with Novell NetWare.
Other network operating systems make it possible for the server to perform other functions. For example, you can compose a letter by using a word processing application on a Microsoft Windows 2000 or Server 2003 server. However, server resources are typically best used for processing user requests; therefore, using the server for these types of tasks is not recommended.

Workstations (example: Pc with windows XP installed on it)
A workstation can be described as a personal computer that is connected to a network, which can perform tasks through applications or utilities. The term client or station might also be used. While a workstation can share resources such as files with other network users, this is not the workstation's primary function. A workstation must be connected to a network using some type of media, such as a cable or through a wireless connection, and it must have a networking protocol, such as TCP/IP, installed

Hosts
A host is any network device,that has a TCP/IP address. In the context of network operating systems, a host call be a server, a workstation, or other peripheral device, such as a printer, print server or fax server

NOTES: anything that has an IP Address is a host no matter if its a server or a client