ZyXEL Communications ZYWALL USG 2000 Support Notes page 180

ZyWALL USG 2000 Support Notes
Step 6.Test result: the subject of email has been tagged
In the result, we can see that the mail from the email server in our black list is tagged as
[Spam]. It means that the anti-spam of ZyWALL is working well.
3.4 Guaranteed Quality of Service
Nowadays if you need a good quality of service, just simply throwing more bandwidth
at your network is not the ultimate solution to this problem, because you can't foresee what
new bandwidth-hungry applications will be in use in several months. An ill-behaved
application can easily bring your network down and potentially shut down your business
operation. To gain more effective control of your network, you need to incorporate Quality of
Service (QoS). In a QoS-enabled network, you can prioritize network traffic flow, allocate
network bandwidth and resources to different applications and users, enforce security to the
applications and the users entering your network, and set network behavior according to the
business needs. Using QoS approach, an application would request a certain level of service
prior to using the network. If bandwidth is expensive in your region, QoS style approach may
make more sense than just simply adding more bandwidth. It is assumed that there is
insufficient capacity for all users to complete what they want at the same time.
180
All contents copyright (c) 2008 ZyXEL Communications Corporation.