Employees in a Company Are No Longer Able to Access

Employees in a company are no longer able to access Internet web sites on their computers. The network administrator is able to successfully ping IP address of web servers on the Internet and is able to open web sites by using an IP address in place of the URL. The administrator runs the nslookup command for www.eccouncil.org and receives an error message stating there is no response from the server. What should the administrator do next?

A) Configure the firewall to allow traffic on TCP ports 53 and UDP port 53.
B) Configure the firewall to allow traffic on TCP ports 80 and UDP port 443.
C) Configure the firewall to allow traffic on TCP port 53.
D) Configure the firewall to allow traffic on TCP port 8080.