Logs show an unauthorized IP address entering a secure part of the network every night at 8:00 p.m. The
network administrator is concerned that this IP address will cause an issue to a critical server and would like to
deny the IP address at the edge of the network. Which of the following solutions would address these
concerns?


A. Changing the VLAN of the web server
B. Changing the server's IP address
C. Implementing an ACL
D. Installing a rule on the firewall connected to the web server