Now the big picture is sketched out it's time to fill in the little details.
The big LIC network contains two smaller types of network:
- the power network, made from components ranging from extension leads to consumer units, and
- the data network which includes NICs and ethernet cables.
The network topology gives an idea of how these things are connected.
Each computer on the rack needs to talk to the LAN (Local Area Network). I use network cables to connect the network interfaces of each IBM PC to the network interfaces of each ethernet switch. A photo of these connections leads to mystification. The design relies on abstraction for explanation.
|LIC topography: network components|
|rack||PCs and monitors||cables and switches|
many physical things make up the LIC.
- a rack holds everything.
- an IBM PC (Personal Computer) base units run firewalls and other applications.
- a KVM switch is part of the KVM network.
- Each PC contains NICs (Network Interface Cards).
- dozens of blue, red and grey data network cables connect everything together.
- A UPS (Uninterruptible Power Supply) and kettle leads are part of the power network.
Many virtual things make up the LIC.