Wireless broadband
Wireless broadband includes two kinds, one kind is mobile phone Internet, of course, now can also use the network card through the laptop Internet. The other is the very fashionable wireless local area network, or WiFi.
Wireless broadband Internet access is easy
Cable broadband
There are a lot of wired broadband, one of the more common is ADSL, the original telecom operators in order to make full use of existing telephone lines and the development of a technology. All construction costs were lower because of the use of existing telephone copper wires in the house. But the transmission rate is generally only up to a few megabytes, although the theory can achieve a higher rate, but in practical application, the quality of many families of copper wire is not good, not up to the theoretical maximum.
Another common type is cell broadband, using Ethernet technology, the average transmission rate per user can reach about 10 megabytes.
Last year, with all the fuss over the convergence of the three networks, broadcasters will also be able to offer telecoms services, especially Internet access, using the same coaxial cables used by existing cable networks. The basic technical scheme of radio and television is EOC, which is Ethernet Over Cable. According to the different number of users, each user can also reach more than 10 MB. Shanghai Telecom's broadband users can apply for a free bandwidth upgrade from January 1, with the maximum speed up to 20 mbit/s.
The optical fiber broadband
The most advanced technology is optical fiber, which can be divided into FTTH and FTTB according to the distance from the user. After using optical fiber to the home technology, the user's transmission rate can reach more than 100 megabits. "Fiber to the home", the speed of up to 100 megabytes.
Wireless broadband is convenient and cheap, and wired broadband has high speed
Broadband technologies are not independent, but are often combined to provide services to users. For example: In most homes, all kinds of wired broadband technologies are used to enter the home, and then WiFi is installed. For example, most smart phones now support both WiFi and mobile communication networks. Another example is huawei's E5, which uses the mobile communication network as the transmission network to provide WiFi signals. This feature is already included in the CDMA iPhone. It's said to be a standard feature on the iPhone.
From the development of these years, wireless broadband has incomparable advantages. One is convenience, and the other is low price. Wireless technology is free of cables and can move anywhere. Mobile technology also ensures that when roaming abroad, you can get the same service as at home. In terms of price, WiFi is almost free. Mobile services, though much more expensive, offer a big advantage over the cost of broadband access in hotels and restaurants.
Of course, wired access also has a very prominent feature, is very high transmission rate, fast network speed. With the adoption of optical fiber technology, transmission capacity is almost unlimited. Especially for high-definition TV, fiber is the only solution. In the current process of the convergence of the three networks, if we take a closer look at the development path of radio and television and telecom operators, we will find that optical fiber access technology is finally developed. Telecom ADSL and Ethernet, as well as radio and television coaxial cable will be eliminated.
There are people summed up, wired bandwidth is infinite, wireless bandwidth is limited.
What's the difference between 4MB Internet fiber and 4MB ADSL broadband
There was also a misunderstanding in my previous understanding of optical fiber and broadband. I thought that 4MB network optical fiber and 4MB ADSL broadband are the same, but I don't understand why optical fiber is so much more expensive than ordinary broadband. Today I looked at other people's explanations of both.
Optical fiber upstream and downstream rate equal, ADSL regardless of a few M. It's going to be 50 kelvin. Very rubbish, some of course do not use ADSL with optical fiber. Fiber response delay is very low, the game is very cool.
The delay is different. Upload is different, ADSL is 512K to 1M. Downloading ADSL is affected by transmission media.