Which two inbound TCP ports should you open on the firewall?

Your network contains an Active Directory forest named contoso.com. The forest contains a member server named Server1 that runs Windows Server 2016. Server1 is located in the perimeter network.

You install the Active Directory Federation Services server role on Server1. You create an Active Directory Federation Services (AD FS) farm by using a certificate that has a subject name of sts.contoso.com.

You need to enable certificate authentication from the Internet on Server1.

Which two inbound TCP ports should you open on the firewall? Each correct answer presents part of the solution.
A . 389
B . 443
C . 3389
D . 8531
E . 49443

Answer: B,E

Explanation:

Configuring the following network services appropriately is critical for successful deployment of AD FS in your organization:

Configuring Corporate Firewall

References: https://technet.microsoft.com/en-us/library/dn554247(v=ws.11).aspx