Using classic Outlook for Windows in business environments
The modem (IP 192.168.0.1) is your system's DNS server front-end. The modem, in turn passes on lookups to its DNS server, i.e., 205.171.3.66 in the you tube example. The modem has 2 DNS servers (for redundancy), and the second is probably 205.171.2.66. These 2 servers can change, and that update of DNS servers is one of the things that rebooting the modem was suppose to accomplish. My modem currently uses 205.171.3.65 & 205.171.2.65.