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) 169。 2023 Cisco Systems, Inc. All rights reserved. ICND1 —14 Layer 2 Addressing ? MAC address ? Assigned to end devices 169。 2023 Cisco Systems, Inc. All rights reserved. ICND1 —13 Layer 2 Devices ? Layer 2 devices provide an interface with the physical media. ? Examples: – NIC – Bridge – Switch 169。 2023 Cisco Systems, Inc. All rights reserved. ICND1 —111 HosttoHost Packet Delivery (3 of 22) 169。 2023 Cisco Systems, Inc. All rights reserved. ICND1 —119 HosttoHost Packet Delivery (11 of 22) 169。 2023 Cisco Systems, Inc. All rights reserved. ICND1 —127 HosttoHost Packet Delivery (19 of 22) 169。 2023 Cisco Systems, Inc. All rights reserved. ICND1 —137 Summary ? Layer 1 provides the physical media and its encoding. ? Layer 2 devices provide an interface with the physical media. ? Layer 2 addresses are MAC addresses. ? The work layer provides connectivity and path selection between two host systems. ? Layer 3 addresses are IP addresses. 169。 :22:5108:22:51February 24, 2023 1他鄉(xiāng)生白發(fā),舊國見青山。 :22:5108:22Feb2324Feb23 1世間成事,不求其絕對圓滿,留一份不足,可得無限完美。 , February 24, 2023 閱讀一切好書如同和過去最杰出的人談話。 2023年 2月 24日星期五 8時 22分 51秒 08:22:5124 February 2023 1一個人即使已登上頂峰,也仍要自強不息。勝人者有力,自勝者強。 。 2023年 2月 24日星期五 8時 22分 51秒 08:22:5124 February 2023 1做前,能夠環(huán)視四周;做時,你只能或者最好沿著以腳為起點的射線向前。 , February 24, 2023 雨中黃葉樹,燈下白頭人。 20