To protect an environment against Hash DoS attacks, which two configurations can a Citrix Administrator use to block all post requests that are larger than 10,000 bytes? (Choose two.)

Scenario: A Citrix Administrator made changes to a Citrix ADC, deleting parts of the configuration and saving some new ones. The changes caused an outage that needs to be resolved as quickly as possible. There is no Citrix ADC backup.
What does the administrator need to do to recover the configuration quickly?

Scenario: A Citrix Administrator suspects an attack on a load-balancing vServer (IP address 192.168.100.25).
The administrator needs to restrict access to this vServer for 10 minutes.
Which Access Control List (ACL) will accomplish this?

Which step can a Citrix Administrator take to use default compression policies?

A Citrix Administrator needs to confirm that all client certificates presented to the authentication vServer are valid until the year 2023.
Which expression can the administrator use to meet this requirement?