Cirkuit Planet MH-1000 사용자 설명서

Multi-Homing Security Gateway User’s Manual 

Low latency is everything for gamers. Most home users feel frustrated when trying to play an online game 

over a shared ADSL connection. Unfortunately, most routers have no way of determining the importance of 

the packet at any given time. All the traffic is treated equally, so a packet containing an "urgent" command 

may be delayed. QoS gives you the ability to control the bandwidth. Using IP Throttling, bandwidth limits 

can be enforced on a particular application or any system within the LAN. Prioritization specifies which 

packets have priority and should not be delayed, and which packets have lower priority and should be 

moved to the end of the upload queue. 

 

Suppose there are four students sharing a three-floor house with one single broadband connection. Robert, 

a college freshman, is playing the online game with his group members, while Mary, a sophomore student, 

is talking to her net pal via Skype. Meanwhile, Jerome is downloading a movie file by using the P2P 

application program. Sophia, however, is just trying to log on to the website to send her photos to her family. 

As a result, the net speed slows to a crawl and affects everyone sharing the Internet connection. QoS is 

designed for managing traffic flow and bandwidth to solve this problem. You can first classify different 

applications (online games, FTP, Skype, email) as shown in the table below. Then, you can manage and 

prioritize the flow of bandwidth at different levels (e.g. 30% for games, 20% for downloads, 10% for email, 

20% for FTP, and 35% for others). QoS can be used to identify different applications and assign priority to 

enable a smooth and responsive broadband connection. 

On-line games 

30% 

High 

Skype 5%  High 

Email 10% High 

FTP 

20% 

Upload (High), Download (Normal) 

Other 35%  

 

QoS is also ideal for small businesses using an office server as a web server. With QoS control, web pages 

served to your customers can be given top priority and delivered first so that it will not be impeded by email 

and office web browsing. 

 

Here is a good example of how QoS can work in an office environment. A CEO is holding a 

videoconference with international clients in the meeting room. However, the streaming video and voice 

frequently lag. Sales people are talking to international agencies via VoIP phone, while sending orders via 

email to vendors for production. However, some staff are downloading MP3 music files, large-size photos 

and watching video streaming online. Consequently, the Internet connection slows down. This is why 

business users need QoS to manage data traffic. With QoS, the network administrator can define and 

classify important packets; specify a minimum guaranteed rate for each application, and ensure that 

 

 

 

 

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