Acompany has made the decision to host their own email and basic web services. the administrator needs to set up the external firewall to limit what protocols should be allowed to get to the public part of the company's network. which ports should the administrator open? (choose three.)

Port 25

Port 53

Port 80

Explanation:

Port 25 is to be used for relaying messages between MTAs (Mail Transfer Agents) or from MSAs (Mail Submission Agents) to MTAs.

Port 53 is used by the Domain Name System (DNS), a service that turns human readable names like AuditMyPc.com into IP addresses that the computer understands. Because port 53 is usually open, malicious programs may attempt to communicate on it.

On a Web server or Hypertext Transfer Protocol daemon, port 80 is the port that the server "listens to" or expects to receive from a Web client, assuming that the default was taken when the server was configured or set up. By default, the port number for a Web server is 80.

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