Ukraine cyber attack

While Ukraine is far away from the US, the threat of cyber attack from Russia is not. The US government has asked Americans to look out for Russia
hacking efforts ( https://www.cnn.com/2022/03/26/politics/jen-easterly-interview-russia-cnntv/index.html).
a. Do you think the threat is real?
b. How should individuals and organizations prepare for this kind of malicious attacks?