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CCNA Exploration Network Fundamentals. Chapter 02 Мрежови комуникации. Комуникационни елементи. Комуникациите започват със съобщение или информация, която трябва да се изпрати от един човек или устройство към друг, като се използват различни комуникационни методи.

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CCNA Exploration Network Fundamentals

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CCNA Exploration Network Fundamentals

Chapter 02

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    • ;

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. --


  • () - Segmentation

  • :

    • .

    • ( , )

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  • .

  • .

  • - .

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  • (PC-, )

  • (Media)

  • (Software)

. --


  • (host).

  • (sender) (receiver).

  • .

  • .

  • , .

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  • :

    - Network Access Devices (Hubs, switches, and wireless access points)

    - Internetworking Devices (routers)

    - Communication Servers and Modems

    - Security Devices (firewalls)

. --


  • :

    • ;

    • ;

    • - ;

    • ;

    • QoS ;

    • .

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  • 3 :

  • ( )

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  • .

    • .

    • .

    • .

  • :

    • , ;

    • ( ), ;

    • , ;

    • .

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LAN, WAN, Internetworks

  • Local Area Network (LAN) , , , , , .

  • Wide Area Network(WAN) . , ( Wide Area Networks).

. --


  • Internetworks .

  • Internet

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  • Intranet LAN WAN, ( , . ).

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  • Network Interface Card( ) - NIC, LAN adapter, . .

  • Physical Port . .

  • Interface .

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  • .

  • , (protocol suite). , .

  • :

    • ;

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    • / ;

    • .

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  • :

    • Institute of Electrical and Electronics Engineers (IEEE)

    • Internet Engineering Task Force (IETF)

  • - .

. --


TCP/IP

  • HTTP /

. --


TCP

HTTP ;

.

TCP/IP

20

KC KHOR, Multimedia Univ. Cyberjaya

. --


IP

;

;

- .

TCP/IP

21

KC KHOR, Multimedia Univ. Cyberjaya

. --


(Network Access Protocol) data link .

TCP/IP

22

KC KHOR, Multimedia Univ. Cyberjaya

. --


( Layer Models)

  • - / .

  • :

    • ( )

    • (- )

. --


  • () . . TCP/IP .

  • () , . , . : OSI .

. --


OSI

  • .

  • .

  • , .

  • 7 .

. --


OSI

  • .

  • .

  • Http Web

  • FTP

  • .

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OSI

  • .

  • , , , , .

  • .

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OSI

  • .

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OSI

  • , / 2 .

  • ( )

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OSI

  • .

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OSI (Data Link)

  • -> .

  • (flow control)

  • () .

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OSI

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TCP/IP

,

/

-

,

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(MAC)

(IP)

(Port Nb)

. --


  • PDU Protocol Data Unit

  • Layer 2 - frame.

  • Layer 3 packet

  • Layer 4 segment

. --


!

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