A crossover cable. Some call them console cables.
IP configuration server
The computer hardware that database administrators need most is a computer that will be used as a server. There are also other network elements like routers, switches and cables that will be used.
Usually nothing, today all routers have a DHCP server included.
DHCP Server (Dynamic Host Configuration Protocol)
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caching-only server
There are dozens of different server companies. The best company though that build business routers is the company Cisco.
Windows Server Family, Linux are some examples. And also there are some routers that have the DHCP service enabled.
Settings on a LAN are not stored in any one place; for disaster recovery planning any configuration information should be written down. Most settings for devices on a LAN come from the DHCP server, so backing up that server would preserve most of the typical LAN settings.
This command will allow you to copy a configuration from a TFTP server to the running configuration of a Cisco device. When you issue the command you will be prompted for further details about the TFTP server. The new configuration will replace the active one (or running configuration) and make any necessary changes.
modem
When you are backing up date don't forget to include the folder with the configuration. And backup utility will save everything in that folder. But manually it's better to do that. Just locate all configuration files and copy it in safe place.