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第 7 章 计算机网络基础 PowerPoint PPT Presentation


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第 7 章 计算机网络基础. 教学 重点. 了解: 计算机网络的发展过程与发展趋势。 熟悉: 计算机网络的功能、定义、分类。 掌握: 计算机网络的拓扑结构、逻辑结构、组成结 构和 TCP/IP 协议、 IP 地址、 Internet 应用等。. 计算机网络是计算机技术和通信技术相结合的产物 , 它的诞生使计算机体系结构发生了巨大变化。那么 , 计算机网络涉及到哪些基本概念、基本知识和基本技术呢?这就是本章所要讨论的问题。. 能力 要求.

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第 7 章 计算机网络基础

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7

7


7

:

:

:

TCP/IPIPInternet

,,

7


7

7.4

7.3

7.2

7.6 Internet

7.5

7.1


7


7

7.1


7 1 1

2060,.

4

7.1.1


7 1 11

7.1.1

1

FEP1-1

CCPFEP

Modem

Modem

Modem

1-1


7 1 12

LC

Modem

Modem

7.1.1

,


7 1 13

CCPFEP

7.1.1

,


7 1 14

CCP

CCP

CCP

CCP

CCP

1-2

7.1.1

2

(1)

(2)


7 1 15

20701972LANMANWAN

ISO19771984 OSI,

1974,IBMDGE,1976UNIVAC

7.1.1

3


7 1 16

7.1.1

4

2090,1993

National Information InfrastructureNIINII,

InternetInternet


7 1 17

1-3

7.1.1


7 1 2

7.1.2

, 3


7 1 21

BA

AB

A

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1-4

7.1.2

1-4


7 1 3

7.1.3


7 1 31

7.1.3

1

2

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7 1 32

7.1.3

3

4

,,

5


7 1 4

7.1.4

1

2

3


7 1 41

7.1.4

4

,

5

,

6

7

,


7 1 5

7.1.5


7 1 51

7.1.5

1

2

3

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7 1 52

7.1.5

4

Internet,

5

,

21


7 1 53

7.1.5

6

7

8


7

7.2

,,


7 2 1

Internet

Modem

HUB

HUB

1-5

7.2.1

()()()(Modem)


7 2 11

7.2.1

1

,

2


7 2 12

7.2.1

3

4

5

6


7 2 2

7.2.2


7 2 21

7.2.2

1

,,UNIXNetWareWindowsWindows

2

, TCP/IPIPX/SPXIEEE802, TCP/IP


7 2 22

7.2.2

3

4

,

5


7 2 3

7.2.3

,,,(Topology Structure)


7 2 31

7.2.3

1

,

1-6


7 2 32

1-7

7.2.3

2


7 2 33

7.2.3

3

1-8

1-8


7 2 34

1-9

7.2.3

4

,

,,

,


7 2 35

1-10

7.2.3

5

,


7

7.3


7 3 1

7.3.1

,

1Local Area NetworkLAN

120Mb/s,25km,,

CATV,50Mb/s1km,

1-11


7 3 11

7.3.1

2Wide Area NetworkWAN

,,,

1-12


7 3 12

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MAN

LAN

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7.3.1

3Wide Area NetworkWAN

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MAN

WAN

7.3.1

-

1-14


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DLCI:300

DLCI:399

S3/0

S2/0

S4/0

DLCI200

DLCI400

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2

4

7.3.2

-

1


7 3 21

,

7.3.2

3


7 3 22

7.3.2

2-Point-to-point Network

-

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7 3 3

7.3.3

1Wired Network

2Wireless Network


7 3 4

DDNDDN

7.3.4

5


7 3 41

Internet

7.3.4


7

7.4

7.4.1

1

., 3

2

(OADM)(OXC)


7 4 2

IP,

IPv6

3G

7.4.2


7 4 3

Web

7.4.3

13.6


7

1

2

3

4

7.5

, ,


7 5 1

1

3

2

4

5

7.5.1


7 5 2

OSI

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7.5.2


7 5 3

7.5.3

1

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7 5 4

7.5.4

GB4

1983ISO/TC97OSI


7 5 5 iso

7.5.5 ISO


7


7

2

1


7

4

3

IPv63G


7

7.6 Internet

  • Internet

  • TCP/IP

  • IP


7

7.6.1 Internet

7.6.1 Internet

7.6.2 Internet

7.6.3 TCP/IP

7.6.4 IP

7.6.5

7.6.6 URL


7

7.6.1 Internet

  • Internet

  • Internet

    • Internet2060ARPANET

    • 19691983Internet

    • 19832090

    • 2080ARPATCP/IPARPANETTCP/IPInternet

  • InternetWWWWorld Wide WebE-mailTelnetFTPBBS


7

7.6.2 Internet


7

7.6.3 TCP/IP

  • TCP/IP(Transmission Control Protocol /Internet Protocol)InternetIPTCP

  • InternetInternetTCP/IPTCP/IP

    • IP

    • TCP


7

7.6.3 TCP/IP

  • TCP/IP

    • Telnet(Remote Login)

    • FTP(File Transfer Protocol)

    • SMTP(Simple Mail Transfer Protocol)

    • POP3Post Office Protocol 3

    • HTTPHyper Text Transfer Protocol

    • NNTPNetwork News Transfer Protocol


7

7.6.4 IP

  • IP

  • IP3240255.

    • 10000000 00001011 0000011 00011111 127.11.3.31


7

7.6.4 IP

  • IP

  • IP

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    BIP128.0.0.0191.255.255.255B65534Internet16384B BIP255.255.0.0

    CIP192.0.0.0223.255.255.255C254Internet2097152C CIP255.255.255.0

    DIP224239DIAB

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7

A

(24)

0

(7)

B

10

(14)

(16)

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110

(8)

(21)

D

1110

Multicast Address

8 bits

8 bits

8 bits

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7.6.4 IP


7

net-id

host-id

0

0

0

host-id

1

1

net-id

1

net-id

127

loopback test

7.6.4 IP

  • IP

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      • 1270l

      • 0l


7

7.6.4 IP

  • Subnet Mask

    IPIP,IP

  • IPA255.O.O.0B255.255.0.OC255.255.255.0

  • IPIP10.68.89.1AIP255.0.0.O10


7

7.6.4 IP

  • Default Gateway

    • InternetInternetInternet

  • CIDR

    • 1993IETFIPCIRDClassless Inter-Domain RoutingRFC1517~1520CIRD

    • CIRDABCnetwork-prefix

    • CIRDslash notationIP/133.58.25.38/1832IP1814


7

7.6.5

  • DNSDomain Name System

    • IPIP

    • Internet

      • Internet

    • WWW.Fjau.edu.cn

    • comnetorgedu

    • cnjpuk


7

7.6.6 URL

  • URLUniform Resource LocaltionInternetURLURLInternetWWWWorld Wide Web, URL

  • URL//@/HTTP://www.fjtu.edu.cn/index.html

    • IP


7

7.7 Internet

  • Internet

  • Internet

  • Windows XPTCP/IP

  • ADSLInternet


7

7.7 Internet

7.7.1 Internet

7.7.2 Internet

7.7.3 ADSLInternet


7

7.7.1 Internet

  • Internet

    • PSTN+MODEM

    • ISDNIntegrated Service Digital Network

    • DDNDigital Data Network

    • ADSL


7

7.7.2 Internet

  • ISPInternetInternetTCP/IPTCP/IP

    • TCP/IP


7

7.7.3 ADSLInternet

  • ADSLADSLADSLADSLADSLADSL

    • ADSL

    • ADSL


7

7.8 Internet

  • WWW

  • IE

  • Out Express


7

7.8 Internet

7.8.1 WWW

7.8.2 E-mail


7

7.8.1 WWW

  • WWW(World Wide Web)Internet

    • WWW


7

7.8.1 WWW

    • HTMLHTMLHyper Text Markup Language

    • HTTPWebHTTPHyper Text Transfer Protocol


7

7.8.1 WWW


7

7.8.2 E-mail

  • Internet

  • PDA


7

7.8.2 E-mail

  • E-mail

      • SMTPSimple Mail Transfer Protocol

      • POP3Post Office Protocol 3POP3


7

7.8.2 E-mail

    • [email protected]@163.net

  • [email protected]@163.netAB


7

7.8.2 E-mail

    • ISPWebWeb

    • Windows XPOutlook ExpressFoxmailEudora


7

7.8.2 E-mail

  • Outlook Express


7

7.9


7

7.9

7.9.1

7.9.2

7.9.3 Google

7.9.4


7

7.9.1

  • InternetInternetInternet

  • Internet


7

7.9.2

  • WWW

    • WWW


7

7.9.3 Google


7

7.9.4

  • SCIEISA


7

7.10

    • 7.10.1

    • 7.10.2

    • 7.10.3


7 10 1

7.10.1

  • 1.


7 10 11

7.10.1

  • 2.


7 10 12

7.10.1

  • 3.

  • 4.

      • IE

      • TCP/IP


7 10 2

7.10.2

  • 1.


7 10 21

7.10.2

  • 2.


7 10 22

7.10.2

  • 3.

    • (1)Network Worm

    • (2)Trojan

  • 4.

    • (1)

    • (2)

    • (3)BIOS

    • (4)


7 10 23

7.10.2

  • 5.

    • (1)

    • (2)

  • 6.

    • (1)

    • (2)

    • (3)

    • (4)

    • (5)


7

7.11


7

7.11

7.11.1

7.11.2

7.11.3

7.11.4


7

7.11.1


7

7.11.1


7

7.11.1

K

M

C

M

E(M,K)

D(C,K)

    • DESAESIDEA


7

K1

K2

M

M

C

E(M,K1)

D(C,K2)

7.11.1

    • ;

    • RSA


7

7.11.2

  • Digital Signature


7

7.11.3

  • Digital CertificateInternet

  • CACertificate Authority

  • ITUInternational Telecommunication UnionX.509


7

firewall

server

7.11.4

  • FirewallInternet

Internet


7

7.11.4

    • Packet filtering

    • Application Proxy

    • State Inspection


7

    • STPPVST

    • Uplink fast, Backbone fast, Port fast

    • VLAN,

    • UTP

    • CiscoWorks2000


  • 7

    OA

    1000M

    1000M

    1000M

    Catalyst 6509VLAN

    4GB GEC

    Catalyst4000/3500Catalyst 2950T

    1000M

    1000M

    Catalyst 2950T

    Catalyst 3550

    10/100M

    10/100M

    10/100M

    10/100M

    10/100M

    CiscoWorks 2000


    7

    1.,

    2.Catalyst 6500256Gbps

    3.

    4.10/100MCatalyst 3550 Catalyst 2950UTP

    5.GEC/FEC

    6.ACL,VLANIDS

    7.CiscoWorks 2000NAM

    8.,

    9.IP


    7

    OA

    1000M

    1000M

    1000M

    Catalyst4506/4507VLAN

    4GB GEC

    1000M

    1000M

    Catalyst 2950T

    Catalyst 3550

    Catalyst 3550

    10/100M

    10/100M

    10/100M

    10/100M

    10/100M

    CiscoWorks for Windows

    CiscoWorks 2000


    7

    1.Catalyst4506/4507

    2.64Gbps48MPPS;

    3.

    4.10/100MCatalyst 3550Catalyst 2950UTP

    5.GEC/FEC

    6., ; ACLVLAN

    7.;CiscoWorks2000CiscoWorks Windows

    8.

    9.IP


    7

    10/100M

    10/100M

    10/100M

    10/100M

    OA/

    1000M

    1000M

    1000M

    Catalyst3550TVLAN

    4GB GEC

    1000M

    1000M

    Catalyst 2950T

    Catalyst 2950T

    Catalyst 2950T

    10/100M

    CiscoWorks for Windows


    7

    1.Catalyst 3550T

    2.24Gbps; ; 17Mpps

    3.

    4.10/100MCatalyst 3550Catalyst 2950TUTP

    5.GEC/FEC

    6., ; ACLVLAN

    7.;CiscoWorks Windows

    8.

    9.


    7

    OA/

    100M

    100M

    100M

    Catalyst3550VLAN

    4GB GEC

    100M

    100M

    CiscoWorks for Windows


    7

    1.Catalyst 3550

    2.8.8Gbps; 6.6Mpps

    3.

    4.GEC/FEC

    5., ; ACLVLAN

    6.;CiscoWorks Windows

    7.

    8.


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