ZyXEL nbg-334w Guia Do Utilizador

 Chapter 15 Bandwidth Management

NBG334W User’s Guide

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. 

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. 

Table 57   Bandwidth Management Priorities

Table 58   Media Bandwidth Management Setup: Services

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.