Open Source YUM (ACS package manager) fails with error: “Failed to connect” [changing repomd.xml to HTTP, FTP, HTTPS]

Administer Open Source package manager or ACS package manager by using this link:
https://www-01.ibm.com/support/docview.wss?uid=nas8N1022619
Each time a connection is established, a back end connection communicates to one of several IBM public RPM repositories on the Internet. See this document for more details.
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