AirLive A.DUO - Manual (Page 174)

10. Wireless Network Glossary
167 AirLive A.DUO User’s Manual
ACK Timeout
Acknowledgement Timeout Windows. When a packet is sent out from one wireless station
to the other, it will waits for an Acknowledgement frame from the remote station. The station
will only wait for a certain amount of time; this time is called the ACK timeout. If the ACK is
NOT received within that timeout period then the packet will be re-transmitted resulting in
reduced throughput. If the ACK setting is too high then throughput will be lost due to waiting
for the Ack Window to timeout on lost packets. If the ACK setting is too low then the ACK
window will have expired and the returning packet will be dropped, greatly lowering
throughput. By having the ability to adjust the ACK setting we can effectively optimize the
throughput over long distance links. This is especially true for 802.11a and 802.11g
networks. Setting the correct ACK timeout value needs to consider 3 factors: distance, AP
response time, and interference. The A.DUO provides ACK adjustment capability in form of
either distance or direct input. When you enter the distance parameter, the A.DUO will
automatically calculate the correct ACK timeout value.
Bandwidth Management
Bandwidth Management controls the transmission speed of a port, user, IP address, and
application. Router can use bandwidth control to limit the Internet connection speed of
individual IP or Application. It can also guarantee the speed of certain special application or
privileged IP address - a crucial feature of QoS (Quality of Service) function. The A.DUO’s
features both “Per-user Bandwidth Control” and “Total Bandwidth Control”. “Per-user
Bandwidth Control” allow administrator to define the maximum bandwidth of each user by
IP, IP Group, or MAC address. Total Bandwidth defines the maximum bandwidth of wireless
or Ethernet interface.
Bootloader
Bootloader is the under layering program that will start at the power-up before the device
loads firmware. It is similar to BIOS on a personal computer. When a firmware crashed, you
might be able to recover your device from bootloader.