How a wi-fi network works
Understanding (in simple terms) how this technology works
helps us to choose better configurations
Data transmission between any device (computer, tablet, smartphone,
VoIP phone) communicates via radio waves without the need for connection
cables. The principle seems obvious today, but a few years ago it was an
unthinkable revolution.
The first advantage that is perceived when using a Wi-Fi
network is that the device is therefore not tied to a network socket but can be
used on the move like any mobile phone. All communications between a device and
the Internet take place through a router, a network device that
"intercepts" the radio waves through a system of antennas and allows,
with appropriate technologies, to share the connection to the Internet home to
multiple devices.
The English word "router" really means
"routers" or rather an apparatus that on the way communicates to a
right destination. Each device recognizes its own router through a code that is
continuously transmitted by routers in the air: this is the SSID , a unique
code and allows us to recognize our router. However, these communications must
guarantee a certain level of security and above all the router must be able to
recognize the devices that are authorized to use its services. This is done
through the uses of appropriate security protocols.
Most modern devices already have a built-in network card and
allow for wireless connections. However, there are still devices without Wi-Fi
connection: these are in particular old laptops , which however can take
advantage of the communication ports (PCMCIA or a common USB port) using
network cards that have a rather low cost. Even a desktop PC can take advantage
of one of the expansion slots with a Wi-Fi card: this is useful for connecting
to the Internet where there is no connection socket.
However, it is possible to choose a good number of wi-fi
cards with modern features and
competitive prices.
However, it is necessary to consider two essential limits of
Wi-Fi connections: first of all, the connection speed, even if in recent years
it has significantly improved, it is never comparable to that achievable with a
traditional connection cable; secondly, the Wi-Fi signal tends not to reach all
parts of the house in a homogeneous way and is often interfered with by other
Wi-Fi networks in the vicinity.
There DSL modem
Often the weak point of the wi-fi network is the provider's
modem
Why change the provider's modem?
First, let's consider the base: the modem that the provider
gave you to connect to the Internet.
Almost all the latest generation modems supplied by Internet
ISPs are also wi-fi routers.
The Internet connection speed, of course, depends on many
factors: the type of contract you have chosen, the technology that the provider
uses to reach the exchange (ADSL or optical fiber ).
The modem has a very simple function: connect to the
supplier's control panel and interpret the signal, in order to convert it into
an IP connection.
These devices are obviously essential to connect to the
Internet and perform their function very well, but often lack functionality and
efficiency when used as a wi-fi router.
Even if the average quality of the equipment used by the main
providers has been improving, overall the performance of the wireless sector is
still often poor. If you are connected to a fiber optic network , most likely
your router does not support the latest generation wireless protocols
(802.11ac) and the connection speed to the router will be quite slow.
What are link bands?
The bands are the "highways" through which data
travels: the old technology operated at 2.4 Ghz, while the new wi-fi routers
operate on one or more 5 Ghz bands. Clearly the 2.4 Ghz band will certainly be
more clogged because it is exploited by all wireless devices on the market. In
addition, this band can also suffer a lot of interference from other devices,
such as portable phones, wireless speakers, and even microwave ovens.
The 5.0 Ghz band offers better guarantees of stability
precisely because it is less subject to interference: it is, therefore, a real
wireless data highway that can be exploited with little expense only by
replacing the router with a more recent model.
I router dual band
Dual band wi-fi routers exploit both connection bands at the
same time, therefore, to improve speed by adding up the speed.
If you connect with a 2.4 Ghz network that guarantees a
speed of 300 mbps (megabits per second) and you also connect to the 5.0 Ghz
network that guarantees 600 mbps, the two speeds will add up guaranteeing a
theoretical speed up to 900 mbps .
Obviously the Internet connection speed does not change and
depends on the band guaranteed by the provider, but the rest of the network
will benefit from it to interconnect between different devices. You can also
check directly on Amazon, the best AC wi-fi routers of the moment.
I router wi-fi 802.11ac
Modern 802.11ac wi-fi routers are now quite affordable. If
you want to obtain an immediate result and a significant increase in the
performance of your home network , combine the modem router supplied with a
wi-fi AC router .
You can continue to use the equipment supplied by the
provider as a modem (an indispensable solution, for example if you are
connected to a fiber optic control unit ) and your router to manage the
wireless home network instead .
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