Absolutely. Its jacket is damaged which means it can now be compromised by moisture which alters the signal properties of the cable. Also looks like it was kinked tightly which can damage it.

That is a switch…look closely it requires power and has lights on it. Its just a 3-port wired gigabit network switch.

Nah look closer - its a switch. USB power supply and normal switch LED indicators on the ports.

Idk why they are marketing it as a “splitter” making it sound inferior…that should make for more painful searches next time I need an actual splitter. Which can be handy for like 2x PoE cameras over 1 existing drop…and even 4K cameras will never saturate 100Mbps so its fine.

I’d avoid your ISP DNS for almost any other option. I’ve had multiple ISPs that redirect unregistered domains to their own site or search pages, and/or marketing pages, or decide that some sites or content should be limited for no real reason.

At least the big public ones (Cloudflare, Google, Quad9, etc) have less reason to misdirect your results.

I now run my own DNS resolver, which also can cache results on my LAN for improved speed, and then query upstream to Cloudflare 1.1.1.1 or Google 8.8.8.8 as needed. I’ve been quite happy with that.

A million times better!

Cable modem or all-in-one modem+router?

Cable modems are configured by your ISP and you will have to call (or some can do online) them to have it provisioned, and then they will remove the old one and configure the new one with whatever you pay for.

If you mean the router LAN configuration, that would depend if your old one has a way to export the new one understands. Probably not with consumer hardware.