Network transmission rate and speed measurement method

Network Transfer Rate Overview
According to the Communication industry standards promulgated by the State, fixed broadband 4m/6m/12m/20m products and 3G network 21m/42m products published rate is the data unit bits per second (bps), and the usual user Internet software or download speed refers to the bytes per second (byte/s), The conversion relationship between the two is 8 bit (bit) = 1 byte (byte). Take 4 m bandwidth for example, the actual download speed should be 4M bps divided by 8 (conversion units), about 512k byte/s.

Introduction to Broadband Rates
Internet speed and the website visited (that is, the server on the end), computer performance, distance and so on have a certain relationship. Visiting the British Museum, for example, will certainly be slower. To determine whether the contract bandwidth meets the standard, it is recommended to test through the Unicom speed testing site, Unicom speed-measuring platform is placed in the speed of the most close to the broadband access device location, so its speed of the most close to reflect the actual broadband access rate.
Internet bandwidth: Internet bandwidth includes uplink rate and downlink rate. Uplink refers to the sending of information, downlink refers to receiving information. The rate of common statistical units is bit (bit)/sec (bps). The 1mbps=1024kbps,1kbps=1024bps,1 bit (bit) represents a bits.
At present, the downlink access bandwidth provided by Unicom has 512kbps,1mbps,2mbps and other standards. Traffic is the sum of the amount of data sent and received on the Internet. The common Statistics Unit is in bytes (byte). The conversion relationships between these units are: (1) 1byte=8bits (1 bytes is 8 bits) (2) 1byte/s=8bps, (s)
It is important to note that in the notation of transmission units, B and B represent byte and bit respectively, and the definitions of the two are different and cannot be confused.

a more accurate method of Wideband Velocimetry

At present, there are many methods for speed testing, such as the common use of web pages, the software to test the speed of the Internet, from the principle that these means testing the broadband rate is not accurate, because the above-mentioned broadband speed measurement method is a different speed, We do not know where the location of the server where the speed is used (may be very far), different from the time, location, the introduction of line loss and other factors, test results will be very different, then how to accurately test their use of broadband speed it?
It is recommended to use the peer download software, (such as thunder, Electric Donkey) broadband speed ! As much as possible, these peer-to software will drain the current bandwidth, and the results have a good credibility!
The method is very simple, open the peer software, download can be speed! But pay attention to the matter!
1, download the current more popular resources, such as Office 2010,windows 7,QQ, etc., the best source not less than 200!

2, will download software download speed as far as possible to set the maximum, such as thunder can be in the "configuration-Network Settings", selected as high-speed download mode!
3, observe the download speed, record the floating range of download speed, and refer to the above bandwidth download theoretical value for reference! If the bandwidth of 2M can float in the range of 262K up to 20%, then the broadband you buy is normal! If 2M of bandwidth downloads any resources, the speed is not up to 200K, then you use the broadband there is a problem!

4, the result will be more accurate when the day is tested by noon and night!

Speed test method Three: Using ping to test speed

Use ping to test the computer name and the IP address of the computer, verify the connection to the remote computer, verify the connection to one or more remote computers by sending an ICMP echo packet to the computer and listen for Echo reply packets, which can be used only after the TCP/IP protocol is installed.

Using ping to test speed is also recommended by many people a speed measurement method, the method is very simple to operate. Open Cmd.exe in DOS window input: Ping www.baidu.com-t, and then look at time, if greater than 100ms, that proves that your network speed is very slow, generally between 30-50ms. In fact, this ping method does not calculate how much your network speed is the KB, it can only roughly explain how fast you are at that time. Therefore, this speed test method is not very desirable.

Unicom Speed Test Notes:
1, the access bandwidth refers to the broadband access service provider Broadband services access point bras to the user terminal This section of the link information transmission rate, generally in kbit/s or Mbit/s units. Broadband access rate test is mainly for the downlink direction of the network, that is, from the network side to the customer side direction.
2, because the access network is only a part of the web, so the broadband connection rate is not the same as the use of network services (such as watching video, download files, etc.) experience the actual rate, experience rate refers to the rate from the terminal to the Business Server.

3. The speed measurement service provided by China Unicom is to test the real-time data transfer rate between this machine and the broadband speed server, which can be approximated as the average data rate on the access bandwidth. Suggest can be in 24 hours different time period of speed, as long as there is a speed of the results to reach the bandwidth of the data transmission rate, which indicates that the access bandwidth band is normal, the phenomenon is generally due to the computer terminal, home LAN and the current network, testing system busy and other factors caused, Select a wired computer to test before speed and try to close some network-related applications to ensure the test results are accurate. Each time the speed of the results of the speed is only effective, not the future speed of the results of any predictive effect.

4, China Unicom Speed measurement platform of the speed of the server are placed to the nearest broadband access equipment location, so its speed of the most close to reflect the actual broadband access rate.

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Network transmission rate and speed measurement method