Final answer:
To investigate DDoS (Distributed Denial of Service) mitigations, Maja should consider both DNS sinkhole and Cloud computing, as they are relevant to DDoS mitigation and can help manage or prevent the attack.
Step-by-step explanation:
Maja has been asked to investigate DDoS (Distributed Denial of Service) mitigations. Among the options provided, a. DNS sinkhole and b. Cloud computing are relevant to DDoS mitigation. A DNS sinkhole can help in redirecting malicious traffic to a non-existent address, thereby preventing it from reaching the intended target and causing harm.
On the other hand, Cloud computing services often offer scalable resources and advanced security options that can absorb and distribute the DDoS attack load, making it easier to mitigate without overwhelming the network. Options c. Social media marketing and d. Graphic design are unrelated to DDoS mitigation and can be disregarded in the context of this question.