Quality Of Service (Qos); Security - Samsung OfficeServ 500 Service Manual

Annex A. WLAN(802.11b/DSSS) Specifications
5

Quality of Service (QoS)

QoS refers to the capability of networks that reduces the traffic volume of networks
or reserves some bandwidth. Network administrators provide their networks with
QoS in many ways. QoS does not mean 100% assurance of bandwidth or 0 % of
packet loss rate. However, QoS enables network administrators to send specific
traffic much faster or reserve network bandwidth. Network administrators can
manage the transmittance of traffic more efficiently than before.
QoS is the capability of networks that meets the service level of a specific application
of networks. The simplest QoS sends network traffic according to the priority of
transmittance and prior traffic is transmitted first.
6

Security

In wireless communication, data might leak or impersonation might be happen.
Therefore, MAC sub-layer is using encryption. Many Access Point(AP) products
have filtering function in the bridge or router of upper layer due to the MAC address
of the station.
According to IEEE802.11, encryption is made by combining 40 bits or 104 bits
button generated by 24 bits key and RC4 algorithm of RSA at each station. This is
called Wired Equivalent Privacy(WEP).
IEEE802.11 indicates that WLAN might be decoded due to long interception because
keys are fixed at stations. Therefore, the strict implementation of WEP is discussed in
IEEE802.11i. IEEE discusses procedures for authentication on wireless LAN and
Ethernet to prescribe them in IEEE802.1x standard.
Annex A-8
OfficeServ 500 Wireless LAN Service Manual/Ed.00
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