You are in charge of the network, and someone tells you that they can't get to some websites. You ping the servers and find that you can connect to them. Then you type in the IP address, open the browser, and check to see if it's accessible. But you can't get to them when you try to use the URL. What is the issue? 600 No traffic is allowed on HTTP TCP port 80 Traffic is permitted on ICMP but not http: No traffic is allowed on UDP Port 53 Traffic is Blocked on UDP Port 80 traffic is blocked on TCP port 20