ZyXEL Communications P-660HW-D Series - Manual (Page 127)

P-660HW-D Series User’s Guide
Chapter 7 Wireless LAN 126
7.8 QoS Screen
The QoS screen by default allows you to automatically give a service a priority level
according to the ToS value in the IP header of the packets it sends.
7.8.1 ToS (Type of Service) and WMM QoS
ToS defines the DS (Differentiated Service) field in the IP packet header. The ToS value of
outgoing packets is between 0 and 255. 0 is the lowest priority.
WMM QoS checks the ToS in the header of transmitted data packets. It gives the application a
priority according to this number. If the ToS is not specified, then transmitted data is treated as
normal or best-effort traffic.
Click Network > Wireless LAN > QoS. The following screen displays.
SSH(TCP/UDP:22) Secure Shell Remote Login Program.
STRM WORKS(UDP:1558) Stream Works Protocol.
SYSLOG(UDP:514) Syslog allows you to send system logs to a UNIX server.
TACACS(UDP:49) Login Host Protocol used for (Terminal Access Controller Access
Control System).
TELNET(TCP:23) 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.
TFTP(UDP:69) Trivial File Transfer Protocol is an Internet file transfer protocol
similar to FTP, but uses the UDP (User Datagram Protocol) rather
than TCP (Transmission Control Protocol).
VDOLIVE(TCP:7000) Another videoconferencing solution.
Table 41 Commonly Used Services
SERVICE DESCRIPTION