PLANET WNAP-7350 - Manual (Page 93)

User Manual of WNAP-7350
-86-
A.27 What is VPN?
VPN is the abbreviation of Virtual Private Network. It is designed for creating point-to point private link via shared
or public network.
A.28 What is IPSEC?
IPSEC is the abbreviation of IP Security. It is used to transferring data securely under VPN.
A.29 What is WLAN Block Relay between Clients?
An Infrastructure Basic Service Set is a BSS with a component called an Access Point (AP). The access point
provides a local relay function for the BSS. All stations in the BSS communicate with the access point and no
longer communicate directly. All frames are relayed between stations by the access point. This local relay
function effectively doubles the range of the IBSS.
A.30 What is WMM?
WMM is based on a subset of the IEEE 802.11e WLAN QoS draft standard. WMM adds prioritized capabilities to
Wi-Fi networks and optimizes their performance when multiple concurring applications, each with different
latency and throughput requirements, compete for network resources. By using WMM, end-user satisfaction is
maintained in a wider variety of environments and traffic conditions. WMM makes it possible for home network
users and enterprise network managers to decide which data streams are most important and assign them a
higher traffic priority.
A.31 What is WLAN ACK TIMEOUT?
ACK frame has to receive ACK timeout frame. If remote does not receive in specified period, it will be
retransmitted.
A.32 What is Modulation Coding Scheme (MCS)?
MCS is Wireless link data rate for 802.11n. The throughput/range performance of an AP will depend on its
implementation of coding schemes. MCS includes variables such as the number of spatial streams, modulation,
and the data rate on each stream. Radios establishing and maintaining a link must automatically negotiate the
optimum MCS based on channel conditions and then continuously adjust the selection of MCS as conditions
change due to interference, motion, fading, and other events.
A.33 What is Frame Aggregation?
Every 802.11 packet, no matter how small, has a fixed amount of overhead associated with it. Frame
Aggregation combines multiple smaller packets together to form one larger packet. The larger packet can be
sent without the overhead of the individual packets. This technique helps improve the efficiency of the 802.11n
radio allowing more end user data to be sent in a given time.