Chapter 4: Network Layer 4.1 Introduction 0 4.5 Routing algorithms 0 4.2 Virtual circuit and o Link state datagram networks o Distance∨ ector 0 4.3 What's inside a o Hierarchical routing router 0 4.6 Routing in the 了4.4TP: Internet Internet Protoco O RIP o Datagram format O OSPF o IPv 4 addressing O BGP O ICMP 0 4.7 Broadcast and O IPv6 multicast routing Network Layer 4-10Network Layer 4-10 Chapter 4: Network Layer  4. 1 Introduction  4.2 Virtual circuit and datagram networks  4.3 What’s inside a router  4.4 IP: Internet Protocol  Datagram format  IPv4 addressing  ICMP  IPv6  4.5 Routing algorithms  Link state  Distance Vector  Hierarchical routing  4.6 Routing in the Internet  RIP  OSPF  BGP  4.7 Broadcast and multicast routing