What is a host in networking?
Generally speaking, a host is an computer or device that is connected to a network, especially the TCP/IP network, including the Internet. Each network host has its own IP address and may provide any kind of data to the users and other devices on the network.
What is a Server?
The term server is a computer program or a device that provides certain information resources and/or services for for other programs or devices, called "clients". A typical client–server system works in the request–response model: