The common topology in use today is the STAR. Hubs or switches are used to connect computers together like a "HUB". Switches are faster and better than a hub. Hubs, switches or servers are connected between each other by a "uplink" port that is specifically used to connect these devices together. There are 4,12,24,48,or 96 port hubs that can be purchased. Two hubs connected together with 96 ports would be able to serve 192 computers together. The possibilities are endless.
vlan
The arrangement of computers in a network is known as Network topology.
A group of computers might form a network, but this is not necessarily the case. There is no commonly used collective noun for computers.
LAN - Local Area Network
Servers
Two or more computers connected together create a computer network. Computers within a network can interchange data.
Not all - although most 'modern' computers do. Modern computers tend to be supplied with either an 'on-board' network adaptor or network card plugged into one of the slots on the motherboard. Older computers came without a network card, and needed additional hardware to connect to a network.
It is the relation between computers in network.
That is a printer that is accessible to computers in a network
That is a printer that is accessible to computers in a network
proxy or firewall
Not all - although most 'modern' computers do. Modern computers tend to be supplied with either an 'on-board' network adaptor or network card plugged into one of the slots on the motherboard. Older computers came without a network card, and needed additional hardware to connect to a network.