Solved - Macbook Would Connect to Wifi but Has No Internet Connection

I'm currently visiting my parents in another state.  I last visited them two weeks ago.  The last visit, I was able to connect all of my Apple devices to their wireless access point (WAP) without issue and have been doing that for years, without issue.

I attempted to connect my Macbook Air to their WAP and it connects but I couldn't browse the web.  The browser client was saying that there was no internet connection, yet my mother's MBP could connect.  My Dell G17 could connect.  My iPhone Pro Max could connect.

My parents' router was working with all electronic appliances, with the exception of my MBA.

I used Google to search for "macbook connected to wifi but no internet".  The search results are here.

I focused on this web page - Solved: Macbook Connects to Wi-Fi but Has no Internet Connection - AppleToolBox.

I tried the steps that were recommended and all failed until I reached Step 4, "Change your Mac's Domain Name System (DNS)".

When I changed the MBA's DNS settings to use the Google DNS IPs, I was immediately able to reach Google.com when testing for connectivity.

I'm still not sure what was causing this issue.  When I checked the MBA's DNS settings (before I changed them), the MBA was pulling the DNS settings from my parents' router without issue.  The DNS IPs weren't resolving names, though, and the issue was only affecting the Macbook Air.  It was a very odd issue.

I thought I'd share this issue and fix so that when folks had this issue, they'd have a potential fix.