Exam 300-715 topic 1 question 41 discussion

DE is still valid on ISE 3.0 , there is however several other ports based on the context of the question as seen on this document. https://www.cisco.com/c/en/us/td/docs/security/ise/3-0/install_guide/b_ise_InstallationGuide30/b_ise_InstallationGuide30_chapter_7.html

page 5 at Cisco document clearly answers the question: https://www.cisco.com/c/en/us/td/docs/security/ise/2-0/ise_active_directory_integration/b_ISE_AD_integration_20.pdf

The two ports that should be opened to connect ISE to Active Directory as an external authentication source are LDAP: 389 and HTTPS: 443. LDAP (Lightweight Directory Access Protocol) is a protocol for accessing directory services, such as Active Directory. ISE uses LDAP to authenticate users against Active Directory. HTTPS (Hypertext Transfer Protocol Secure) is a secure version of HTTP that uses Transport Layer Security (TLS) to encrypt traffic between ISE and Active Directory. The other ports are not required for this task. TELNET: 23 is a text-based protocol that is not secure. HTTP: 80 is a protocol for accessing web pages. It is not secure by default, but it can be secured using HTTPS. MSRPC (Microsoft Remote Procedure Call) is a protocol for remote procedure calls. It is not required for connecting ISE to Active Directory.

D & E are the required ports

The provided answer is correct. These are the important ports to open in AD implementation: https://cloudinfrastructureservices.co.uk/active-directory-ports/

correct