CCNA Exploration Network Fundamentals Lecture 6 http goo

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CCNA Exploration: Network Fundamentals Lecture 6 - http: //goo. gl/35 O 6 Zk Ethernet

CCNA Exploration: Network Fundamentals Lecture 6 - http: //goo. gl/35 O 6 Zk Ethernet

Ethernet Два уровня: Data link Physical • •

Ethernet Два уровня: Data link Physical • •

Ethernet frame • • Destination MAC Source MAC DATA CRC

Ethernet frame • • Destination MAC Source MAC DATA CRC

MAC-адрес 48 бит = 2^48 = 281474976710656 6 октетов - 00 -16 -EB-0 E-F

MAC-адрес 48 бит = 2^48 = 281474976710656 6 октетов - 00 -16 -EB-0 E-F 5 -72 8 ой бит - unicast/multicast 7 ой бит - globally unique/local administered [1 -6, 9 -24] - Organizationally Unique Identifier(OUI) [25, 48] - Уникальный номер(для NIC)

MAC-address • • • unicast - первый бит 0 multicast - первый бит 1

MAC-address • • • unicast - первый бит 0 multicast - первый бит 1 broadcast - FF-FF-FF-FF У Virtual. Box 0 a: 00: 27: 00: 00 — unicast и locally administered т. к. 0 x 0 a = 0 b 00001010.

Switch и collision domain Позволяет разделять collision domain на части

Switch и collision domain Позволяет разделять collision domain на части

Activity - 1

Activity - 1

Activity - 2

Activity - 2

Broadcast storm - *BOOM* http: //habrahabr. ru/post/143768/

Broadcast storm - *BOOM* http: //habrahabr. ru/post/143768/

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