A crossover cable. Some call them console cables.
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.
IP configuration server
Usually nothing, today all routers have a DHCP server included.
DHCP (Dynamic Host Configuration Protocol) service can be provided through a dedicated DHCP server that assigns IP addresses and network configuration settings to devices on a network automatically. This server can be software-based, running on a server operating system, or hardware-based, integrated into network routers or switches. Additionally, DHCP can be implemented in a failover setup for redundancy, ensuring continuous service availability. The server communicates with clients using broadcast messages to dynamically allocate IP addresses from a predefined range.
There are dozens of different server companies. The best company though that build business routers is the company Cisco.
DHCP Server (Dynamic Host Configuration Protocol)
Windows Server Family, Linux are some examples. And also there are some routers that have the DHCP service enabled.
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caching-only server
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.
modem
1.Cables for connecting clients and server computer .2.For server ,special operating system is required .