You are a cybersecurity consultant who has been brought in to help design and implement a mid$-$size corporate network defense plan. The organization is focused on buying equipment and installing it as quickly as possible to get their network up and running to support business operations. The organization's CIO tells you that he wants to establish the network as quickly as possible then he will do what is necessary to make sure it is secure$.$ You advise the CIO that security should be designed into the network architecture from the beginning whenever possible. The CIO asks you to explain why security can't just be added after the network is up and running. Which of the following best describes the Bolt$-$On security problem?

Bolt$-$on security rarely works effectively and is usually much more expensive

Bolt$-$on security is far more complex and prone to failure

Bolt$-$on security leave seams, gaps and overlaps that can create attack vectors

All of the above