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Denial of Service
A Denial of Service attack is an attempt by a user (or users) to
make a server’s or network’s services unavailable. The user
sends a server multiple requests with false return addresses.
The server will attempt to respond by sending a request back to
the user; however, since the address is false, the server will wait
for a response before closing the connection. When multiple
requests like this occur, servers may often get overloaded with
too many requests and stop functioning altogether. This is a
typical DoS attack, although DoS attacks may not be limited to
this type of attack.
The Router can assist in preventing these types of attacks by
scanning the network for patterns of activity that represent DoS
attacks. If a pattern comes in frequently, the Router can attempt
to block messages containing that pattern and thus protect the
server from becoming overloaded and unresponsive.
RTA00
QUALITY OF SERVICE
QoS prioritizes and guarantees network performance for a
specific IP Address range or MAC Address. QoS is often used for
applications that require steady bandwidth. Common
applications include VoIP phones, video streaming applications
(i.e. DVRs, network cameras, video on demand), online gaming
and servers.
It is important to note that while QoS helps to prioritize and
guarantee bandwidth for a specific device, it does not provide
you with more bandwidth than you currently have. For
example, if your Internet Provider rates your Internet
connection speed at 5Mbps, QoS will not improve that
connection. QoS helps you better manage the 5Mbps that you
have so that the bandwidth is prioritized for devices on your
network that may need the provided 5Mbps more than other devices. However, if you have an application that
requires more than 5Mbps of steady bandwidth, the application will continue to experience “lag” with or without
QoS since your available bandwidth is less than the required bandwidth of your application.
