You should use at least an AC1900 router with…

Motorola MB7621 vs Motorola MB8600 The MB8600 can only work with one device. You can connect the MB8600 to either your computer or a router. You can connect up to four devices straight to the MB8600 if you pay for and get more than one IP address from your Internet service provider. I bought a Motorola MB8600 cable modem in May 2022. It does not have four Ethernet ports, but only one. I’m not happy because having an extra port would be very helpful for troubleshooting with a laptop that is directly linked and not going through a different router to get to the rest of the network.
The Model MB8600 is made with the future in mind. Since it allows Ethernet port sharing for speeds of more than 1Gbps, it should be used with a router that also has this feature. Any WiFi router can work with the MB8600 modem. You should use at least an AC1900 router with the MB8600 because of how fast it is. Depending on the other devices in your network, you may be able to get a better wireless link.
Top Internet Speeds for All Levels of Multi-Gigabit Bandwidth- Wirecutter says that this is the best cable modem for people who have Gigabit internet connections. All cable Internet service companies offer the fastest Internet speeds with DOCSIS 3.1 and DOCSIS 3.0 with 328 features. Get rid of the need to rent a cable router and you could save up to $168 per year. (The saves shown are for Comcast Xfinity, and they will be different for other television companies.) Comcast Gigabit services and Cox Gigablast, as well as all other speeds, are approved by Comcast Xfinity, Comcast Xfinity X1, Cox, and CableOne. not working well with RCN. (No cable modem is compatible with Verizon, AT&T, CenturyLink, Frontier, and others’ fiber optic, DSL, or satellite services.). Motorola’s MG7315, MG7540, MG7550, and MG7700 all have a wifi router built in.) Compatible with Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum, Time Warner Cable, BrightHouse, CableOne, SuddenLink, RCN, and many other cable service companies. Stop paying up to 156 dollars a year to rent a cable connection. (Savings are shown for Xfinity, but they are different for each television company. No cable modem works with fiber optic, DSL, or satellite services from Verizon, AT&T, CenturyLink, Frontier, or anyone else. The MB7621 doesn’t have a phone jack.) Requires cable Internet service.
The MB7621 type is recommended for real cable Internet service speeds of up to 650 Mbps. Wirecutter says that this modem is “the best for most people.” A Full-Band Capture Digital Tuner makes sure that your Internet link is more reliable and faster. This cable modem’s 1 Gigabit Ethernet port lets it connect to a WiFi network, computer, HDTV, game system, or device for streaming video. Excellent support with Whole Home WiFi or Mesh networks, like eero, Google WiFi, and Orbi. This cable modem can’t make phone calls or connect to a wifi network. Get rid of the need to rent a cable router and you could save up to $168 per year. (The saves shown are for Comcast Xfinity, and they will be different for other television companies.) Comcast Gigabit services and Cox Gigablast, as well as all other speeds, are approved by Comcast Xfinity, Comcast Xfinity X1, Cox, and CableOne. not working well with RCN. (No cable modem is compatible with Verizon, AT&T, CenturyLink, Frontier, and others’ fiber optic, DSL, or satellite services.). Compatible with any Wi-Fi router, including Whole Home Wi-Fi and Mesh routers like eero, Google Wi-Fi, and Orbi. A 10/100/1000 Gigabit Ethernet port lets you connect ANY Ethernet-capable device, like a router, Windows or Mac computer, HDTV, or game system. This cable modem doesn’t have a wifi link or a way to make phone calls. Active Network Security- When it comes to protecting against denial-of-service attacks, a Broadcom chipset is the best.