Router introduction
As an electronic product that every household needs now, routers are a huge market. The prices are also uneven, search on a treasure can be seen, cheap routers may be tens of dollars, expensive may be thousands. It can be seen from the purchase classification that routers are generally classified into home routing, broadband routing, network security routing, enterprise routing, multi-service routing, mini-routing, Internet cafe routing, and broadband routers.
What you need to do before you shop is to clarify your needs: home. In addition to the most basic home needs, there are some requirements such as:
1 The majority of computer plugged in cable, or mobile devices are mostly wireless
2 want to have a better wall effect
3 comes with features (wireless bridge, QSS, external storage, etc.) and so on.
1. The Gateway to the Internet World: Interface
Behind the router there will be a row of holes that look the same, this is the mother of the crystal head. The number of crystal heads is not unique, there may be four, there may be six, or even two. However, there are only two of these long and same interfaces (which will be differentiated by color): WAN ports and LAN ports.
We do not explain terminology, and only express it in easy-to-understand words.
·WAN
The WAN port can be understood as the main valve of the tank, which is connected outside the home.
There are three ways to access a broadband home: cats, optical cats, and network cables. The WAN port connects to these devices.
1 cat, cat is a modem, will be a network cable, the other end of this network cable is inserted in the WAN port;
2 Light cats, similar to cats, except that the telephone line has become an optical fiber (friendship reminder: Fiber Jedi not to fold, please gentle winding) only;
3 The network cable enters the home, and this network cable can be directly inserted into the WAN port of the router.
·LAN
If the WAN port is the main valve of the tank, then the LAN port is a root pipe in the home. The toilet water, the kitchen water, and the balcony water all need it. It is the internal connection of the house. LAN port is connected to the Internet terminal: laptop, desktop, monitor or our millet phone.
In fact, these two interfaces are well understood, I believe we will not pick the wrong ~
2. Source of WiFi: Antenna
The antenna thing is actually a wire that transmits and receives signals.
Someone who likes to buy routers likes to have "a lot of antennas", thinking that this signal will be good and the Internet will be fast;
Some people prefer "small numbers of antennas" when they choose to buy, and think that such radiation is small.
I just want to say: tan90°! ! nonexistent! !
The signal strength of the wireless network is not greatly related to the number of antennas.
What are so many antennas? So what does the strength of the signal depend on?
When the transmitter and receiver devices both support MIMO (Multiple-Input Multiple-Output) and have multiple antennas, the number of antennas affects the wireless rate at the same location; the routers of many types of antennas, gimmicks Accounted for a big factor, if you don’t believe it, everyone can experiment at home!
The decisive factor for the quality of a wireless router's signal is the transmit power of the wireless router. All countries have provisions for the transmission power of wireless routers, which should generally not exceed 100mW, which is 20dBm (2.4GHz band). So we can see that, in fact, according to national standards, the signal strength at the transmitter is fixed. Regardless of several antennas, its transmission power will not change, and it will not affect the coverage of wireless signals.
What really affects signal strength is the router's hardware configuration (wireless RF chips and wireless amplifiers), the placement of routers, the structure of the house, the gain of the antenna, wireless network cards, and other factors.
Specific to see the specific product parameters and introduction, which should be written clearly above ~
As for wireless radiation, we must first scan the blind.
From some Wikipedia interpretation of "radiation": "radiation refers to the field of electromagnetic energy from the source part of the source to the distance to spread, and then return to the field source phenomenon."
(Scribe points) Radiation is a phenomenon, not a substance.
So, in the ancient times when technology was underdeveloped, there was no radiation?
nonexistent!
# Why then say that radiation is harmful? #
(Also focused) Radiation is divided into two types based on its energy and material capabilities: ionizing radiation and non-ionizing radiation. The nouns are so esoteric that they only need to know that radiation is divided into categories, and that the same gas is also a source of life-sustaining oxygen and life-threatening toxic gases. 100% is harmful to the human body is ionizing radiation
Non-ionizing, as the name suggests, is not the radiation of ionized material. For example, electromagnetic waves communicated by mobile phones include base station signals and Wi-Fi signals.
The human eye is invisible to electromagnetic waves
In other words, people themselves are also radiation sources, constantly radiating people around them, and the same people around you are also constantly radiating you.
Yes, electromagnetic waves are everywhere, so you shut down your own router and break Wi-Fi.
How is the router next to your home?
What about the brakes?
Even if the electricity in the entire community is broken,
There are also three major operators' base stations at work.
Therefore, these are all in vain.
Some international authorities have passed extensive tests and concluded that some signals in daily use do not cause harm to the human body. So we don’t have to worry about radiation.
3. Don't be pitted by the inspection: bandwidth
Firstly, we need to understand what the computer plug-in cable has gone through: telecom operators - cats - routers - computer network cards. Each connection will have an interface, and there must be bandwidth for everything. In simple terms: To run a 200M broadband network, the computer may not be able to enjoy a speed of 200M. The bandwidth is divided into 10Mbps, 100Mbps (one hundred trillion), and one Gbps (gigabit). For applications larger than 100M broadband, all interfaces of computer network cards and routers are Gigabit. Otherwise, only 100Mb bandwidth is available.
In other words:
1 Telecom operators: Telecom provides 200M broadband services
2 light cat: light cats have to support Gigabit, otherwise it can not reach 200M
3 routers: WAN verbs support Gigabit, or less than 200M
4 routers: LAN port to support Gigabit, or less than 200M
5 computer network card: must be a Gigabit network card, otherwise it can not reach 200M
6 network cable: change CAT5e, CAT6 (six type), otherwise less than 200M
Any problems in any of the above links have a direct impact on the speed of the network (if telecommunications broadband is greater than 100M).
Why should we focus on bandwidth?
Because: There are some routers WAN port is 100M, and LAN port is Gigabit. If your home broadband is 200M, choose this router, I'm sorry, the download speed is up to 11MB/s, because the router WAN port is not Gigabit.
So what's the use of a 100M WAN port and a Gigabit LAN port? The speed of file transfer in the LAN is improved. For example, software files such as Feiqiu and IP Messenger are used. The two computers are connected via the LAN port. At this time, the speed of Gigabit broadband can be used. The WAN port is one hundred trillion, and the speed bottleneck on the external network is one hundred trillion.
Some people may say that 200M broadband or even faster broadband is not used, but now operators are implementing tariff cuts, optimization of network speeds, if your home broadband can speed up for free, do you upgrade? So, understand the doorway here and be prepared.
4. Data Highway: 2.4GHz and 5GHz
The 2.4GHz and 5GHz mentioned here are not 3G, 4G and 5G in mobile communications.
2.4GHz is the most commonly used and most common, and its characteristics are: good penetration, long transmission distance, and poor carrying capacity;
5GHz is more advanced and gradually popularized. Its characteristics are: poor penetration, transmission distance, and strong carrying capacity.
It is due to the common and common 2.4GHz, so the interference is more serious;
The 5GHz device terminal requirements, if the old device does not support 5GHz, even if the router launches a 5GHz signal, the terminal will not find this hot spot.
5. Waste You Can't See: Installation
Why is it wasteful?
Since the antenna (whip) signal radiates outward 360°, the location of the router is important.
In general, the router is best placed in the center of the required coverage to ensure maximum use of the radius of radiation.
If it is placed in a remote place such as a window, it means that part of the coverage is outdoors. Is this not a waste?
Take a look at the diagram, better understand:
Look at these, for the router is not a clear understanding of it, for the millet router efforts should be more understand it ~
Outer chapterNow that the router has a lot of features, compared to the previous need to log in to the router background in the browser to configure the router, now the mobile app can directly control the router, and even has a lot of features, but also can install a lot of plug-ins.
I don't think these features will be used by everyone, but there are some features are still very recommended, such as: Thunder remote offline download.
The router supports external U disk or hard disk, some can be inserted TF card or SD card expansion, install the plug-in on the router, you can act as a download machine and Samba.
For example, when a company is working, someone shares a movie. You can download the task to the router at the company. The router automatically downloads it to a memory card or USB flash drive. You do not need to open your home computer. You can watch it directly after you arrive home.
With a wide range of routers, I generally use this function too, because some resources are not very good, download relatively slow things, I have to hang on the router to download, save the computer.
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