Chapter 14 Bandwidth Management

Table 53 Bandwidth Management Priorities

PRIORITY LEVELS: TRAFFIC WITH A HIGHER PRIORITY GETS THROUGH FASTER WHILE TRAFFIC WITH A LOWER PRIORITY IS DROPPED IF THE NETWORK IS CONGESTED.

Mid

Typically used for “excellent effort” or better than best effort and would include

 

important business traffic that can tolerate some delay.

 

 

Low

This is typically used for non-critical “background” traffic such as bulk

 

transfers that are allowed but that should not affect other applications and

 

users.

 

 

14.6 Predefined Bandwidth Management Services

The following is a description of the services that you can select and to which you can apply media bandwidth management using the wizard screens.

Table 54 Media Bandwidth Management Setup: Services

SERVICE

DESCRIPTION

Xbox Live

This is Microsoft’s online gaming service that lets you play multiplayer Xbox

 

games on the Internet via broadband technology. Xbox Live uses port 3074.

 

 

VoIP (SIP)

Sending voice signals over the Internet is called Voice over IP or VoIP. Session

 

Initiated Protocol (SIP) is an internationally recognized standard for implementing

 

VoIP. SIP is an application-layer control (signaling) protocol that handles the

 

setting up, altering and tearing down of voice and multimedia sessions over the

 

Internet.

 

SIP is transported primarily over UDP but can also be transported over TCP,

 

using the default port number 5060.

 

 

FTP

File Transfer Program enables fast transfer of files, including large files that may

 

not be possible by e-mail. FTP uses port number 21.

 

 

E-Mail

Electronic mail consists of messages sent through a computer network to specific

 

groups or individuals. Here are some default ports for e-mail:

 

POP3 - port 110

 

IMAP - port 143

 

SMTP - port 25

 

HTTP - port 80

 

 

BitTorrent

BitTorrent is a free P2P (peer-to-peer) sharing tool allowing you to distribute large

 

software and media files using ports 6881 to 6889. BitTorrent requires you to

 

search for a file with a searching engine yourself. It distributes files by corporation

 

and trading, that is, the client downloads the file in small pieces and share the

 

pieces with other peers to get other half of the file.

 

 

MSN Webcam

MSN messenger allows you to chat online and send instant messages. If you use

 

MSN messenger and also have a webcam, you can send your image/photo in

 

real-time along with messages

 

 

WWW

The World Wide Web (WWW) is an Internet system to distribute graphical, hyper-

 

linked information, based on Hyper Text Transfer Protocol (HTTP) - a client/server

 

protocol for the World Wide Web. The Web is not synonymous with the Internet;

 

rather, it is just one service on the Internet. Other services on the Internet include

 

Internet Relay Chat and Newsgroups. The Web is accessed through use of a

 

browser.

 

 

 

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ZyXEL NBG-334SH User’s Guide