ZyXEL Communications P-660HW-D Series - Manual (Page 125)

P-660HW-D Series User’s Guide
Chapter 7 Wireless LAN 124
7.7.2 WMM QoS Priorities
The following table describes the priorities that you can apply to traffic that the ZyXEL device
sends to the wireless network.
7.7.3 Services
The commonly used services and port numbers are shown in the following table. Please refer
to RFC 1700 for further information about port numbers. Next to the name of the service, two
fields appear in brackets. The first field indicates the IP protocol type (TCP, UDP, or ICMP).
The second field indicates the IP port number that defines the service. (Note that there may be
more than one IP protocol type. For example, look at the DNS service. (UDP/TCP:53) means
UDP port 53 and TCP port 53.
Table 40 WMM QoS Priorities
PRIORITY LEVELS:
Highest Typically used for voice traffic or video that is especially sensitive to jitter
(variations in delay). Use the highest priority to reduce latency for improved voice
quality.
High Typically used for video traffic which has some tolerance for jitter but needs to be
prioritized over other data traffic.
Mid Typically used for traffic from applications or devices that lack QoS capabilities.
Use mid priority for traffic that is less sensitive to latency, but is affected by long
delays, such as Internet surfing.
Low This is typically used for non-critical “background” traffic such as bulk transfers
and print jobs that are allowed but that should not affect other applications and
users. Use low priority for applications that do not have strict latency and
throughput requirements.
Table 41 Commonly Used Services
SERVICE DESCRIPTION
AIM/New-ICQ(TCP:5190) AOL’s Internet Messenger service, used as a listening port by ICQ.
AUTH(TCP:113) Authentication protocol used by some servers.
BGP(TCP:179) Border Gateway Protocol.
BOOTP_CLIENT(UDP:68) DHCP Client.
BOOTP_SERVER(UDP:67) DHCP Server.
CU-SEEME(TCP/UDP:7648,
24032)
A popular videoconferencing solution from White Pines Software.
DNS(UDP/TCP:53) Domain Name Server, a service that matches web names (e.g.
www.zyxel.com ) to IP numbers.
FINGER(TCP:79) Finger is a UNIX or Internet related command that can be used to
find out if a user is logged on.
FTP(TCP:20.21) File Transfer Program, a program to enable fast transfer of files,
including large files that may not be possible by e-mail.
H.323(TCP:1720) NetMeeting uses this protocol.