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RC

📄1.2 Access Networks📄1.3 Packet Switching📄1.4 Overview of Delay in Packet-Switched Networks📄1.5 Layered Architecture📄4.1 Overview of Network Layer📄4.2 What's Inside a Router📄4.3 The Internet Protocol (IP)- IPv4, Addressing,IPv6, and more📄4.4 Generalized Forward and SDN📄6.1 Introduction to the Link Layer📄6.2 Error-Detection and -Correction Techniques📄6.3 Multiple Access Protocols📄6.4 LANs📄7. Wireless📄Aula 7📄Aula 8📄Aula 9 - Switching

RC

📄1.2 Access Networks📄1.3 Packet Switching📄1.4 Overview of Delay in Packet-Switched Networks📄1.5 Layered Architecture📄4.1 Overview of Network Layer📄4.2 What's Inside a Router📄4.3 The Internet Protocol (IP)- IPv4, Addressing,IPv6, and more📄4.4 Generalized Forward and SDN📄6.1 Introduction to the Link Layer📄6.2 Error-Detection and -Correction Techniques📄6.3 Multiple Access Protocols📄6.4 LANs📄7. Wireless📄Aula 7📄Aula 8📄Aula 9 - Switching
← Back to RC/Aula 8

Endereço MAC -> 48 bits (6bytes) -> exclusivo da nossa placa de rede

==AA====BB====CC==DDEE44
IPPayload
20 bytes0-1480 bytes
Preambulo==DST====SRC====Type==IPPayloadCRC
20 bytes0-1480 bytes4 bytes

Endereçamento MAC muda a cada salto (cabeçalho do ethernet está sempre a mudar parte a ==x==) Ethernet = 802.3

ArP request SRC: MAC 1 DST: FF - FF -FF - FF - FF - FF

ARP request R1 -> 1 SRC: MAC R1 DST: MAC 1

Tabela ARP 1

IPMAC
R1 1MAC R1

Tabela ARP R1

IPMAC
IP 1MAC R1