Unit 5: Network Layer I: Introduction, Packet Forwarding and Routing, Difference between Virtual Circuits and Datagram networks, The internals of a router: Input ports, output ports, switching architecture The Internet Protocol(IP), Datagram format, IP fragmentation, IPv4 addressing, subnets, CIDR, classful addressing, DHCP, Network Address Translation(NAT), Universal Plug and Play as a provider of NAT,Internet控制消息协议(ICMP),IPv6标头,从IPv4移至IPv6:隧道,对IP安全性的简短讨论(注意:网络层将继续在下学期路由计算机网络II中路由算法)
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