A network administrator who manages a Linux web server notices the following traffic:

http:$//$comptia$.$org$/../../../../$etc$/$shadow

Which of the following is the BEST action for the network administrator to take to defend against

this type of web attack?

A$.$ Validate the server certificate and trust chain.

B$.$ Validate the server input and append the input to the base directory path.

C$.$ Validate that the server is not deployed with default account credentials.

D$.$ Validate that multifactor authentication is enabled on the server for all user accounts.