Today Internet connection is available practically from any place in the world. Therefore regardless of where there is a user spoiled by progress, he always wishes to have the high-quality and high-speed Internet. Certainly, vendors adapt to the market because of what modems were available for sale Wi-Fi (3G and 4G routers). These devices solve a problem of simultaneous connection of several users to one 3G/4G channel, with one SIM card. To understand how this problem is solved, it is necessary to understand as Wi-Fi the modem works.
Instruction
1. Standard Wi-Fi the modem is formed from two main devices: 3G or the 4G-module (as a matter of fact it is the normal USB modem to which we got used) and router Wi-Fi. At connection of Wi-fi of the modem to the computer and initial installation of drivers, each module then starts execution of the specific task which, nevertheless, are extremely coordinated with each other.
2. The module of the mobile Internet at connection provides to the user an output in a wide area network by means of technologies of cellular communication. In different devices this module can use as standard 3G, and more modern 4G (the last differs from the first first of all in higher data transmission rate, including for the users moving with a high speed). This device directly participates in data transmission from Internet space.
3. However it is simple to obtain information insufficiently, she is required to be transferred to end users, that is laptops, phones, tablets and other devices. This task is carried out by Wi-Fi the module, distributing requests from attached devices so that the module of the mobile Internet in parallel could process requests of each connected consumer.
4. Memory of the device contains the routing table which saves paths to all devices consumers in the local area network. The related network of devices is formed, to each of which the module selects the most optimum and short path.
5. Then the device with a certain frequency sends test packages to each address to learn time for which the package will reach and whether it will reach in principle (if the device was switched-off). Current state of the card of network is continuously maintained by means of the routing table at the expense of what distribution of one channel with the mobile Internet on several devices is reached.
6. At application of Wi-fi of the modem by means of one mobile connection and only one SIM card more or less constant Internet connection of several different devices and users is provided. Nevertheless the similar way of web surfing is not considered very qualitative. In working hours of such network, irrespective of the provider providing services, jumps of speed and rare shutdowns are possible. Modern technologies do not allow to provide better communication, comparable, for example, with stationary connection yet.