A technician wants to increase the reliability of a DHCP server. Which of the following components should be installed to increase the server's uptime on the network?

Increasing RAM improves server performance and capacity but does not protect against hardware failure or prevent the server from going offline.

Using a lower voltage power supply does not increase reliability and could actually be harmful if it does not meet the server's power requirements.

Adding a hardware firewall improves network security but does not address the server's hardware redundancy or uptime.

Redundant NICs allow NIC teaming or failover configuration, meaning if the primary network interface fails the secondary automatically assumes the connection, eliminating a common single point of failure and maintaining the server's network availability without downtime.