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:202005:

–a.–.–.,,,,..,,a:

2––––––––3

:

––––

“”

a

,802.1x()

a5.0802.1xV5.0:–:

4

a.–.

:–2

(1200)A802.11802.1x&802.11g

,,

225––––––––6

..,aa-.

()–2.45:a–––.

:–a:

7

(900)(1.8-1.9)902-928

2.4-2.4835()2.4-2.4835()2.4-2.497()2.4-2.4835()802.11b802.11g5.15-5.35(1&2)5.15-5.35()5.15-5.25()5.15-5.25()5.25-5.35()802.11a2()+++---()-()82.4()

()()()12412XXXX22417XXXX32422XXXXX42427XXXXX52432XXXXX62437XXXXX72442XXXXX82447XXXXX92452XXXXX102457XXXX112462XXXX122467XX132472XX142484X802.11b

:

:

!!

92.42.4002.48352.4372.4122.4172.4222.4272.4322.4422.4472.4522.4572.4622.4672.4721611

12345678910111213142.4842.4(2.4-2.4835)2.4-2.497802.11b5:802.11(.),2.42212.4

()17131410–5.1505.2505.3505.4705.7255.825100200S2002002002002002002002001W4W1W4W1004W2/4W1W1W1W1W1W5.8

10010100*101001001004W*)2.4002.48584––.2.4971155.1005.2005.3005.4005.5005.6005.7005.8005.9005.1505.1505.1505.2505.3505.3505.4705.7255.7255.825200/1W2001W4W==

:,:

12–..,2.45.

2.45,:,“”……–,.

11

2.45

13–,,,,..:

a

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802.11a5802.11a–2.414

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.

55%

15

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a

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C95.1-1991

65

55011

(<100)’s,:

17

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,,18-1996,,,.

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a802(&)802.3802.15802.11()21

,--802.11.

a200–1500–

:,2.45(5)22

,,,.,.802.111997–2.4-1.6-2802.11b1999:11–2.4–802.11a1999:54–5-802.11f2003

802.11g2003:54–2.4802.11h2003

802.11e2004

802.11i2004

802.11j2004

802.11k2005

802.11n2006:100802.11p

802.11r

802.11s

23

802.11–802.11a().:802.11:802.11a,802.11b,802.11g.––802.11(a)1997"":,:()–1.6()–2,

()802.11–802.11b,ag802.1124

802.11a/b/g–802.11a802.11b802.11g

52.42.4

541154

28-315-728-31(.11g)10-12(.11b)

48,36,24,18,12,965.5,21:

()()()

(.11b)6448541624361218695.5112154,48,36,24,18,12,9,633,22,11,5.521

(=)(,,)25

11802.11b54802.11a802.11g..:()()()a:1500802.11ag28-31802.11b5-7–5431116-7802.11a802.11b5431802.11g26

802.11g–a11g11b11g11a.802.11ga11b11g:11g.802.11g11b11g802.11b–802.11g,802.11b-802.11b802.11g802.11g802.11baa802.11g28-3113.527

802.11g–a802.11g802.11g802.11g

28-31802.11g802.11b802.11g

~13802.11

802.11b802.11a

28-31802.11b802.11g802.11g802.11b802.11aAa802.11b802.11ga.802.11g~21~13802.11b802.11g.802.11a802.11gba28

2().802.11a,2802.11a.25–54.42802.11a.18512()–

:

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-1394()

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802.11h–802.11h.()()5.,'sa802.11a.(),,:

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30

802.11f–802.11.802.11't.802.11f,802.11f–

802.11f

802.11f23802.11f802.11f802.11f31

802.11e–802.11e802.11.802.11,.802.11e::()()()–:–-()––

802.11e802.11802.11e802.11e802.11

32

–802.11a.:(,,),().:Aa.A’s.a.A,.,a,(802.1120µs,802.119µs).,.B’sCD,B.CDB,a.Ba,Ea,BaCDB,.,D’s..ABCDE

33

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()316312725551110231023102334

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35

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1200

39

–1121361265.54818954,.100–a.--

802.11a802.11b802.11g802.11g802.11b

24~124802.11g802.11b40

–802.11a(406)──────►802.11g(302,2)802.11b(1002,2)5413m(45)27m(90)4815m(50)29m(95)3619m(65)30m(100)2426m(85)42m(140)1833m(110)54m(180)1239m(130)64m(210)1148m(160)48m(160)945m(150)76m(250)650m(165)91m(300)5.567m(220)67m(220)282m(270)82m(270)1124m(410)124m(410).802.11a802.11g.802.11g.

1200

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2.4:45

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11166116

46

..–()–802.11e()()802.11b6

:-802.11b=3802.11a=8

11100206111147

,..

“B”“A”“B”“A”

“B”“A”“B”

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–––84802.11()()“”().“”.802.11–802.11:,.40–,128–

12840

85802.11

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.5.6.(~100).......:050114:050114:050114:010434

86802.11

a....

:,.87802.11

a.,...a“”a:,–

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802.11:050114:0104340

:050114:0104340::1(:0104340)2(:050114)89802.11

–()802.11.,a.–a–––

()802.11

STOP

90802.11

802.11

802.11

.,..–

,a()–

,:10005A0059910=10005A0053905=:10005A0042807:10005A0053905STOP

()91802.11

.:,.,,.

,802.11

:==802.11

STOP

92802.11

–802.11.a...

a:,,,802.11

802.11-

:050114:362236:050114:362236:050114:362236

93802.11

–802.11.,..

,,,.4.5.

,

a..:050114:362236:050114:362236:050114:362236

94

802.11

–802.11.128..,.

.4.5.6.

.

:050114:362236:050114:362236:050114:36223695802.11

802.11

-

aaa–

–802.1x802.11i

a–:802.1x802.11i,

96802.11

A(),()200144.()2444“”==,100,000–1,000,000IVMSDUICV0-2304InitializationVectorPADKeyIDOctetsBits42462

Encrypted

4==,'s97–––––802.11

–––98

,,....–

STOP

99

()'..,.

20002000802.11i

4121/312000

100

802.11a,,...

()’s––,–

()

802.11

101

.a..

–a

:

802.11

AccessController’s

102

a.,a.

,

:(),

AccessController’s

103

,,.802.11i,.

802.11i802.11i–a802.11

802.11

()

()104

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,

–(v2)802.1x++802.11i

12840

(v1)105

802.11802.1x2004802.11i,...–

802.1x

802.11iv2802.1xv1

STOP

106

802.1x(v1)802.11i–802.1x..()802.1x()(),––

:802.1x

()107

–"".––,(),.

a128""'sa16

4–10,000a:–

108

–802.11()aaaa–802.11()

4

4

109

–802.11––802.11

––-–––,a..

,,,

110

802.11i(v2)802.11i802.1x––.802.11i:()

4–()a48–802.11:-()

()a48802.1X:

––111

–()a’s802.11i,.a.’sa–

a802.11i

/:802.1x,

2003,,,:()::,,’s112

–():,,,.

“”:113

802.11i1802.1x

()()

()

1()1.802.11i2802.11i.802.11i1.2802.11i114

()2802.11i-a.2,(,).200220032004v1v22005

29

Q1802.11iQ2802.11i

Q4802.11i

115

802.1x-802.11

802.1X..:52()

()()--.

()()

.116

5–5802.1x5.a.5a802.1X.a5.5,

555

5802.1x-802.115

STOP117

–802.1x–()–.

EAP-Ciscosupplicant

:A802.11::802.1x

()118

()(),EAP-Ciscosupplicant

()

.,.'s.

()

()119

–..’s.5.’s22a’s2a2,a(4)

.10,,,.

a!–120

–(2716),a.a.a,–

,:,X,95/98,2000.

()

WindowsXPorEAP-TLSsupplicant2000

++

()121

()()(),

()

WindowsXPorEAP-TLSsupplicant

()

122

–.a.,.–

…,

EAP-TTLSsupplicant

:,,

()123

2–802.1X.a;a,.

()(?)2000

()124

EAP-PEAPsupplicant

()()(),

()

aa.().

125

()–()802.1X.(),.

()()2000

()126

–()a802.1X.(8,2004).aa-a

a,,,(),(),

()127

()

(,,.)

3

..5a.’s.128

–()'s.().a.

HLR

EAP-SIMsupplicant129

1@

EAP-SIMsupplicant1@

?

?

()(),

()

130–––––802.11

–––131

.a,.“”802.11:802.11–(.)

()

:

1200

132

100–,–..

./(802.11a,b,g).,

()

802.1x802.11i()

1200

133...a.:

()

/(/)

()

134.

=,10030

802.1x(v.1)

802.11i(v.2),

’s

,

802.1p

,

,

,...135–.,a.:–

()…:

136–a24,a.

2000:

;802.11802.11’s,

;137

a..:–

,,(),,,,,,,3e

138–

500,,,

,a,500-10,000+1000,,

25,

139

,,3,,,,,,.:

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,,

,,

140–

1.2.

:.WWW

:

ABWW1.,.(’s):()

“”141W–

()

/1

2…,aa.W142–––––802.11

–––143

+,.,,.,:(–)()’sa()0900801a118144

1000=20004100()

()

6500

1100,1130,1200,1230,1300==145’sQ12005''sa,'.'s,,a2005,a'.$192.,."”,''s,a.",.",,,,."

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