Replacing the modem provided by your Internet Service Provider (ISP) with a MikroTik device is a great way to improve the stability of your network, expand wireless coverage, and gain more control over your network configuration.

However, it is crucial to understand the difference between a modem and a router, as well as the specific capabilities of the MikroTik equipment you mention.

Initial considerations

• Modem vs. Router: A modem connects your local network (LAN) to the Internet (WAN) by converting your ISP's digital signal to a signal your local devices can understand, and vice versa. A router distributes that Internet connection between the various devices on your local network. Some MikroTik devices act primarily as routers and do not include built-in modem functionality. To completely replace your home modem, you would need a device that can handle signal conversion or purchase a compatible modem and then connect a MikroTik router to this modem.
• Internet Connection Type: Depending on your connection type (DSL, cable, fiber, etc.), you may need a specific modem to convert the ISP signal to Ethernet before it can be managed by a MikroTik device.

MikroTik Equipment Options

Given these considerations, the MikroTik devices you mention are excellent routers and access points for home or small office networks, but they do not directly replace the functionality of a modem. Here I explain how you could use them:

• RB951Ui-2HnD: This is a SOHO wireless router with good signal strength and basic routing capabilities. It is ideal for small home networks.
• hAP series (such as hAP ac²): These devices are very versatile wireless routers with access point capabilities. They offer good performance and wireless coverage for homes and small offices.
• RB2011UiAS-2HnD-IN: It's a little more advanced, offering five 1 Gbps Ethernet ports, five 100 Mbps Ethernet ports, and wireless capabilities. It is suitable for SOHO environments that need more ports and connectivity options.
• RB4011iGS+5HacQ2HnD-IN: This is a high-performance device with ten 1Gbps Ethernet ports and advanced wireless capabilities. It is designed for larger networks and users who require high connection speeds and performance.

Suggested Implementation

To replace your ISP's modem with a MikroTik device, you should first connect a compatible modem (that converts your ISP's signal to Ethernet) to one of these MikroTik routers. This will allow you to manage your local network with greater efficiency, security and flexibility.

If you're looking to improve wireless performance and routing capabilities in your home or office, any of the equipment mentioned above would be a significant upgrade over the modems/routers provided by most ISPs.

However, for a network with specific requirements (such as support for many simultaneous connections, wide coverage, or advanced networking features), the RB4011iGS+5HacQ2HnD-IN would be a robust and future-proof option due to its high performance and advanced capabilities.

Remember to check compatibility with your type of Internet connection and, if necessary, use a compatible modem between your Internet line and your MikroTik router.