Explanation
Redirecting the attacker's traffic is a viable containment strategy for a distributed denial of service (DDoS) attack because it helps to divert the malicious traffic away from the target server and reduce the impact of the attack. A DDoS attack is an attempt by attackers to overwhelm a server or a network with a large volume of requests or packets, preventing legitimate users from accessing the service or resource. Redirecting the attacker's traffic is a technique that involves changing the DNS settings or routing tables to send the attacker's traffic to another destination, such as a sinkhole, a honeypot, or a scrubbing center. A sinkhole is a server that absorbs and discards the malicious traffic. A honeypot is a decoy server that mimics the target server and collects information about the attacker's behavior and techniques. A scrubbing center is a service that filters out the malicious traffic and forwards only the legitimate traffic to the target server. Redirecting the attacker's traffic helps to contain the DDoS attack by reducing the load on the target server and preserving its availability and performance. Therefore, redirecting the attacker's traffic is the correct answer.
References:
* https://www.fortinet.com/resources/cyberglossary/implement-ddos-mitigation-strategy
* https://learn.microsoft.com/en-us/azure/ddos-protection/ddos-response-strategy
* https://www.cloudflare.com/learning/ddos/glossary/sinkholing/.