Bandwidth management for effective use of Internet cafe Resources

Many services depend on the Internet. Therefore, bandwidth resources are often difficult to use and require constant attention from network administrators. For users who rely on bandwidth to provide services, such as Internet cafes, residential broadband, school dormitories, and ISPs), if the bandwidth is insufficient, the users will complain frequently when accessing the Internet. In addition, there are many emerging applications, such as the crazy Download Software Bt and thunder, which occupy a lot of bandwidth. Therefore, bandwidth management has become a hot topic. This article also applies to residential area bandwidth for Internet cafes.

Recognize principles

To do well, you must first sharpen your tools. As a manager, you must first understand some basic concepts of Internet applications to implement corresponding management. Here you need to understand the concepts of address, port, content, packets, routers, etc. Here we will focus on the introduction of packets.

To ensure the security and smoothness of the transmission process, the content is separated and the header and tail information is added for transmission in the form of packets. Each packet has the sending and Destination Address, port used, content size, and required information for transmission. The main purpose of a packet is to facilitate the scattered processing of the transfer work and ensure that the transfer work is forwarded from the sending Address to the destination address in sequence as expected. Therefore, you only need to be able to understand the relevant information of the packet. Generally, during bandwidth management, transmission information is mostly checked through resolution packets.

In general, the purpose of various Internet applications is to transmit information content, but to effectively transfer, the content will be packaged in a packet, packets are transferred between networks by means of IP addresses and communication ports. Therefore, to effectively manage the bandwidth, you must view the various information of the packets and manage these transmission features.

Instance description

When users access the Internet, such as Browsing webpages or sending and receiving emails, the bandwidth is about kbps ~ 200 Kbps. If a downstream ADSL of Kbps is used as an example, when ten people share an ADSL bandwidth to access the Internet at the same time, the response speed is acceptable. However, because the chances for all users to access the Internet at the same time are not high, such bandwidth can generally meet the needs of users with less than 30 users.

However, when there is a large number of downloads, a user can occupy most of the bandwidth. According to tests, in a normal internet cafe environment, the bandwidth that a BT user can occupy is usually as high as 2 Mbps ~ 5 Mbps, occupying multiple ADSL bandwidth at once. When we provide support to users, such as residential areas, hotels, and enterprises, we often find that users complain that the Internet is suddenly "changed to a card", and the Internet access through email reception is slow, which is considered a router problem, results After carefully checking the package, the number of people inside the package who are downloading BT or watching online movies is, which affects the normal operations of others.

It should be noted that downloading programs such as BT usually occupy the upstream and downstream bandwidths, which affects other users. For example, watching online movies, every user needs to occupy about 0.8 Mbps, so three or five users are enough to occupy an ADSL bandwidth.

In addition, when assisting users with bandwidth management, we often encounter the following phenomenon: "The bandwidth is intended for users. Why should we limit it ?" As we do not know, in many cases, a single user often affects all other users. In Internet cafes or residential areas, it often causes other users to "Call cards" for a long time, instead of going to the door or asking to unsubscribe. The restriction on specific people makes it inconvenient for a few people, such as downloading a patch from a few minutes to an hour or updating a patch from several seconds to several minutes.

Therefore, bandwidth should be considered as an important resource for enterprises, Internet cafes, residential areas, and schools. Only appropriate management can make a great use of it. Next, we will introduce the tools available for bandwidth management.

The bandwidth that a person needs to use when surfing the Internet.

Bandwidth occupied by service types

10 Kbps ~ 30 Kbps

Watching movies at 0.6Mbps ~ 0.8 Mbps

20 kbps for online games ~ 30 Kbps

Sending and receiving emails depends on the bandwidth of the user and the email server. Generally, it is about 30 kbps ~ 500 Kbps

FTP download depends on the bandwidth between the user and the FTP server. Generally, the download can take up to seven of the available bandwidth.

BT download depends on the bandwidth available to users. Generally, it can take up to of the upstream and downstream available bandwidth.

Online Game updates depend on the bandwidth between the user and the FTP server. Generally, downloads can take up to seven of the available bandwidth.