An ultra complex LAN system would be used for high priority systems in banks,offices, and government use. The system would contain
- 1. Network interface cards (PC's)
2. Firewalls (Software and Hardware)
3. Routers
4. Repeaters
5. Switches
6. VPN's
7. NAT's
8. All special systems
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All systems will have a MAC address and will require a MAC address replicator to trick MAC filters on some LAN components.
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Firewalls would be bypassed on a LAN with port scanners and connecting on an open port.
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Repeaters do not need to be bypassed because they are just repeating a signal.
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VPN connections would be connected by a dotted line from the LAN to a Second LAN, and possible multiple VPN's per network.
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Routers, and Switches - The router would be used for connecting the system to the internet and split that connection to multiple network switches, the switches in turn would then in turn connect sections of the office to the internet (over 64 computers per switch)
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The NAT would be the data center, this may just be to keep personal file's for the employees, research files would not be saved on this system as this system has no security.
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The "special" systems would be the, public accesses server (directly connected to the primary router), mainframes, data centers, servers, supercomputers and the like.
With a system this complicated it would only be used for LARGE company's and high pay jobs, and maybe destroy this company mission (shut down LAN).
Banks should have these to make it extremely hard to to hack and would take a very long time.