Choosing a new home network setup means deciding on the right modem or router to purchase.
Choosing a new home network setup means deciding on the right modem or router to purchase.
I’m just starting out with setting up a home network. I bought a new house and need to get a router and possibly a modem. The internet comes in via a coaxial cable into the house. I want two Wi-Fi spots—one upstairs and one downstairs. Can you explain the roles of a modem and a router? Which one should be the first to pick up the signal from the cable, and which one is responsible for spreading that signal throughout the house as Wi-Fi?
I’m also considering some brands and models, like the Eero system you mentioned (https://eero.com/shop/home-wifi-system-2-pack). What are your thoughts on them?
Lastly, are there any upcoming Wi-Fi standards that might change things soon? I want to see if a new standard could make me think about upgrading my router or modem in about six months. This purchase is competing with a Comcast rental at around $10 per month. I’m trying to decide if the investment will be worthwhile compared to renting.
a modem usually receives the signal from a coaxial cable and forwards it to another device such as a router. Some modems come with routers, though they often lack strong performance. A router, on the other hand, sends out wireless signals for connection. When it comes to brands, quality tends to be consistent, but each offers unique features—consider what suits you best. I’ve used Netgear, Asus, and Linksys before; Asus seemed the top choice for me, though opinions vary. The latest standards like Wi-Fi 6 or Ax are faster and more reliable, but compatible routers are still limited. I rent modems and own routers myself. The Eero system uses a mesh network with multiple nodes to extend coverage, while I prefer a strong single router over mesh setups. I haven’t thoroughly researched the differences yet.
802.11ax/wifi 6 is the latest update, maybe hold off another month or two for more affordable wifi 6 devices and improved pricing, starting near $250. I’m okay with my current Google Wi-Fi, though it’s a bit costly.
A modem grants access to the ISP's network. It comes in various forms, such as phone lines, coaxial cables, or fiber optics. If your connection originates from a cable provider like Comcast, you benefit from cable internet that follows the DOCSIS protocol. Modems typically transform the type of cabling your ISP employs to deliver internet into a format compatible with home networks, like Ethernet connections. A router functions as a versatile tool, handling NAT operations so multiple devices can share a single IPv4 address assigned by the ISP. It also offers firewall safeguards and usually includes a DHCP server that assigns IP addresses automatically. Some routers come equipped with switches and wireless access points. A switch enables linking several Ethernet devices together, while a wireless access point transmits Wi-Fi signals. Many providers supply a gateway device in one package. In my view, separate units are preferable. Be cautious if your ISP uses their phone service—then you may need an eMTA modem. This adds complexity when purchasing alternatives, as companies like Comcast have strict requirements for compatible devices. Brands such as Asus and Netgear are commonly available. I’d recommend them as reasonably reliable options. ASUS also offers AI mesh technology, simplifying network setup and extending coverage to weaker spots. My sister uses Google Home WiFi, which performs well with fast speeds, though it costs around $300 for three devices.
My setup is Comcast’s cable service, specifically the SB6141 model. I wouldn’t advise purchasing this modem as it’s outdated. Comcast may phase out support eventually, forcing upgrades. Suitable modems include CM500, CM600, SB6183, or any Docsis 3.1 device. I own a Synology RT2600 AC router for $200, which provides full 2.4 GHz and 5 GHz coverage in my two-story home of 1300 sq ft, plus outdoor access. Currently, Wi-Fi is the standard; AX wireless is emerging but remains costly and not widely adopted yet. Comcast offers Wi-Fi gateways, though their performance is uncertain.
I’ve used a modem for five years on this network, enduring several router upgrades. You only need a replacement when it fails or when speeds exceed its capabilities—Comcast caps at about 200 Mbps. Higher speeds demand newer equipment. Separate routers don’t affect the modem’s function. You can change IP addresses as needed. The main shift is acquiring a fresh Comcast modem.
Wireless AC is still in development, with Wireless AX potentially arriving soon but at a high price. For now, it’s unclear how widely it will be adopted. At $13–$15 monthly, it doesn’t seem worthwhile. Remember, modems have a lifespan. My SB6141 has lasted five years despite multiple router changes. The only real need for a new one is when it stops working or you upgrade to faster speeds. I’m on 150/10 bandwidth, so I’m within its capabilities. Generally, the more channels a modem supports, the higher the potential speeds. Different routers don’t influence the modem’s performance. You’re free to update your router whenever desired. The only change is obtaining a new IP address from Comcast.
A note: I’ve been with Comcast over ten years. Feel free to ask if you have any questions.