?? LAN ????? - PowerPoint PPT Presentation

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?? LAN ?????

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Title: ?? LAN ?????


1
?? LAN ?????
  • ????? ??? ?????
  • ???????? 4?
  • ?? ??

2
????
  • ?? LAN ???
  • ?? LAN ???????
  • - ??
  • - ??
  • ?? LAN ????
  • - ????
  • - ????????
  • EPnetFaN ???? LAN ??????

3
?? LAN ???
  • Wireless Local Area Network
  • ? LAN ????????????

???LAN????????? ??????!
4
?? LAN ??????????
??
??
??? ???????? WDS????
5
?? LAN ??(????????)
  • ???????????????????????????????????
  • ??? ???
  • ??
  • ??????????????

6
?? LAN ??(???????????)
  • PC ????????????
  • ???
  • ?????? PC ??????
  • USB ?? CardBus ???
  • ??????????????????????????????

7
????
  • ????????????????
  • IEEE 802.11 ??(??????????)
  • 2.4GHz?
  • 802.11b(99???)11Mbps
  • 802.11g(03???)54Mbps
  • 802.11n(09???)600(300)Mbps
  • 5GHz?
  • 802.11a(j)(99???)54Mbps
  • 802.11n

8
?? LAN ??????
  • ?? LAN ???????????
  • ?????????????
  • ? ?????????!
  • ?????
  • ??????????????????
  • ?????
  • ???????????????????
  • ??2??????????!

9
?????
  • ?????????????????????
  • ????
  • ???(PSK) ??
  • ?????????????????????????
  • 802.1X (Enterprise) ??
  • ????????? EAP ???????????
  • ?? SSID ??? MAC ????????

10
?????
  • ????????
  • WEP
  • RC4 ?????????????
  • TKIP
  • RC4 ???????????????????????WEP????
  • AES(CCMP)
  • Rijndael ???????

11
???????
  • ??????????????????
  • Wi-Fi Alliance ??
  • WPA
  • TKIP ?? 802.1X ?????(???)
  • WPA2
  • AES(CCMP) ???

12
???????
  • ????????????? 128bit ???
  • ? ??????????????
  • ?WEP ???????????
  • WEP???? RC4 ????????
  • ??? WPA ?
  • 2009/8 ??? ??????1??????????????

13
EPnetFaN ?? LAN ??????
  • ?????
  • ????????????(????????????????!)
  • ????????????
  • ?????????????
  • ??????????????????
  • ?????
  • ???????????????
  • ?????
  • WPA/WPA2-TKIP/EAP??
  • ?????OS
  • WinXP?Win7?MacX

14
????
  • ????????? ???LAN???????WPA?????1??????????????
  • http//journal.mycom.co.jp/news/2009/08/31/011/ind
    ex.html
  • Think IT ?WEP?????????????
  • http//thinkit.jp/article/810/1/
  • Internet Week 2005 ??????????LAN???????
  • http//www.soi.wide.ad.jp/class/20050042/slides/53
    /
  • Allied Telesis ???LAN?????
  • http//www.allied-telesis.co.jp/products/list/wire
    less/knowl.html
  • NETWORK-STUDY ???LAN??????? WEP?????
  • http//www.n-study.com/network/2005/08/lan_wep_1.h
    tml
  • ITpro ???????LAN????????
  • http//itpro.nikkeibp.co.jp/article/COLUMN/2006082
    4/246278/?STnettech
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