IP IP Net. Access Net. Access Net. Access Net. Access Physical

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Presentation transcript:

IP IP Net. Access Net. Access Net. Access Net. Access Physical Physical Physical Physical Application Application TCP/UDP TCP/UDP IP IP Net. Access Net. Access Physical Physical

IPsrc IPdst MACsrc MACdst Application layer: FTP, TELNET, SMTP, SNMP, HTTP Routing Protocol: BGP, OSPF, RIP -> Multicast Transport layer: TCP, UDP, SCTP IP, ICMP, IGMP, RSVP (QoS) ARP, DHCP PC4 PC3 Router R3 Routing Protocol L2 Switch Router R1 ARP: IP->MAC addr X.25 ATM Router R2 Ethernet Hub Ethernet Hub Bridge PC2 IPsrc IPdst Upper layer PC1 DHCP DHCP Server MACsrc MACdst IP Packet subnet (IP addr. bitwise-AND SubnetMask)

Interconnected Device Ethernet Hub L1, Repeater Collision Domain PC1 PC2 PC3 PC4 PC1 PC4 PC2 PC3 Subnet Broadcast Domain Collision Domain Collision Domain PC1 PC3 L2 Device PC2 PC4 Bridge L2 Switch Collision Domain Collision Domain Subnet Subnet L3 Device Router R1 Subnet Subnet All-layer Device Firewall