2 pointsif your IP addresses are handed out (aka managed) by DHCP the DNS entrees that you include in the router are dished out with the IP address. as you move from place to place the DNS will get changed along with the IP the new place is using. some "hot spots" will not work unless you use the DNS provided. and sometimes that DNS blocks certain sites (pr0n, pirate, hate, facebook, etc) because the place does not want to deal with the traffic. like DO YOUR WORK at WORK not look up cat videos… sometimes you want to put a specific DNS in the computer. maybe for a GAME or a for testing to see if your newly updated DNS specs for a domain are updating. or your ISP provided DNS is flaky so you choose to use google or some other public server.
1 pointNo @Waldo Pepper. If you manually enter the DNS addresses into the Network Setting in System Preferences on the Mac (under Advanced…), then those are the DNS setting that will be used (not the ones from the DNS router). It's actually one way you might get around DNS filtering/blocking on specific network. For example here is how its looks configured locally on my Mac for using the OpneDNS servers: Just remember that these are set per interface, so if you also use a wired Ethernet connection you'd need to set them there too. All this said, at home I have the OpenDNS setting set up on my router so that all Macs/Devices in my home network are using OpenDNS. The main reason is because my cable ISPs DNS (Cox) has proven to be slow and unreliable in the past. That, and OpenDNS does automatic blocking of know hacked and attacked websites.
1 pointI use a Synology DS213J obviously quite old now (I purchased it in 2014) I have 2 x 3TB WD Red drives in it and a Wireless adapter connected. I never had any issues, I've heard that Synology can be more geeky to set up than Drobo but I had no problems (found it quite easy). If your drives are external you can add them via USB to the Synology to give extra storage, you can also share the attached USB drive. Don't if this helps but hope it does.
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