M.Sc. Tezi Görüntüleme
The wireless lan grows rapidly nowadays with the advantages such as easy installation, widening and moving ,its popularity increases especially in business world and computer sector. With the help of developing technology, rising transfer rate and standardization labouring among the manufacturers,they find more application fields day by day and the number of users increases.
The standards used for the wireless lan are 802.11 ones developed by IEEE(Institute of Electrical and Electronic Engineers).The developments of these standards started in 1997 with 802.11.It became 802.11b and 802.11a in 1999, 802.11g in 2003 and 802.11n in 2008. 802.11i involves security redevelopment of the existent 802.11.On the wireless lan the first generation security protocol is WEP(Wired Equivalent Privacy). RC4 algorithm developed by RSA Data Security is used as a coding algorithm.Many security deficits of WEP are ascertained.It is started to develop the second generation security protocol 802.11i in order to remove these security deficits;however, a system called Wi-Fi Protected Access appears so as to provide a short term solution. TKIP(Temporal Key Integrity Protocol) protocol on WPA is framed as an update to WEP. 802.11i defines CBC-CCMP (Counter Mode Cipher Block Chaining Message Authentication Code Protocol) in order to supersede WEP and TKIP.This system uses AES(Advanced Encryption Standart) as a coding algorithim.
On this thesis sound data flow between two wireless line and telephone is investigated firstly using WEP security protocol on the wireless lan installed with the hotspot run in 802.11g standard.Then the same process is looked over again by using WPA security protocol.How to get sound data flow with WPA security protocol without any loss is explicated.
Key words: WLAN, LWAPP, WEP, WPA, Voice over IP.