These clients provide a persistent addressing method for devices that change their location, configuration or IP address frequently.
Even this DNS facility still used static lookup tables at each participating node.
IP addresses, once assigned to a particular host, rarely changed and the mechanism was initially sufficient.
"root_domain" is a user set env var on external-dns service; record set - host ip addresses where service is deployed.
Example: service "foo" in stack "bar" belongs to environment "baz" has containers deployed on host1 and host2. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
Windows 2000 and later have a "DNS Client" service which is enabled by default.
This service caches DNS lookups for the local computer only.
The private network behind these routers uses address space set aside for these purposes (RFC 1918), masqueraded by the NAT device.
This, however, broke the end-to-end principle of Internet architecture and methods were required to allow private networks, with frequently changing external IP addresses, to discover their public address and insert it into the Domain Name System in order to participate in Internet communications properly.
You will actually save both CPU power and memory by disabling the service on all the local computers.