ZyXEL Communications NBG-417N User Manual

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Chapter 16 Bandwidth Management
NBG-417N User’s Guide
142
16.5.3  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 in the Management > Bandwidth MGMT > Advanced screen.  
16.5.4  Services and Port Numbers
Se
 for commonly used services and port numbers.
Table 58   
Media Bandwidth Management Setup: Services
SERVICE
DESCRIPTION
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.
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. WWW uses port 80.
Telnet
Telnet is the login and terminal emulation protocol common on the Internet and 
in UNIX environments. It operates over TCP/IP networks. Its primary function is 
to allow users to log into remote host systems. Telnet uses port 23.
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
SMTP - port 25
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. 
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.
Gaming
Online gaming services lets you play multiplayer games on the Internet via 
broadband technology. One example is Microsoft’s Xbox Live, which uses port 
3074. As of this writing, your NBG-417N supports Xbox, Playstation, Battlenet 
and MSN Game Zone.