Each type of Internet connection has its own type of router:
ADSL – for connecting to the global network via a telephone cable. Ethernet – for connecting with a twisted-pair cable. PON (CPON, CEPON) – for fiber-optic Internet connection.
In addition, there are universal routers with the implementation of several technologies. For example, Ethernet + 3G (4G) or ADSL + Ethernet. They are more expensive, and their purchase is justified only when all connection methods are used.
A router is a mini-computer comparable in performance to an office PC 10 years ago. Accordingly, the more powerful the processor, the greater the capacity of operational (RAM) and permanent (ROM) memory, the higher the quality of communication. Models that will be relevant in the next 3-5 years are equipped with a processor with a clock frequency of 300 MHz, have at least 128 Mb RAM and from 16 Mb ROM.
The Wi-Fi module is equipped with all the routers of the latest generation home segment, even those that do not have external antennas (antennas in such models, of course, are present, but are inside). For cheap routers with only internal antennas, the coverage area is minimal – the interior wall is often an insurmountable barrier for them. If your house has more than one room, it is optimal to choose a device equipped with 2 or more external antennas with a gain of 3-5 dBi.
There are also expensive models with only internal (powerful) antennas. Their attractive design outperforms the “horned brethren,” but such antennas are not easily replaced.
Wi-Fi Transmit Power
The more powerful the wireless signal transmitter, the more stable and stable the connection. Devices that can provide high-quality Internet connection in a medium-sized apartment are equipped with transmitters with a power of 15-20 dBM.
All routers manufactured in recent years support the IEEE 802.11n communication standard, which transmits data at speeds up to 600 MBit / s when connecting 4 antennas (150 MBit / s per antenna). Some models are also supplemented with support for IEEE 802.11ac, a new generation standard transmitting at speeds up to 6, 77 GBit / s (866 MBit / s per antenna, the maximum number of which is increased to 8) and backward compatible with 802.11n.