quartz/content/notes/19-network-layer-data-plane.md

title	aliases	tags
19-network-layer-data-plane		cosc203 lecture

• transport layer messages are divided into segments
• passed to network layer
  • sender: encapsulates segments into IP packets, passes to link layer
  • reciever: deliver segments to tranport layer protocol
  • sender and reciever are connected by multple routers
• routers
  • examine header fields in all IP packets passing through it
  • moves IP packers from input ports to output ports to transfer packets along end-end path
• network layer protocols
  • IP
  • internet control message protocol (ICMP)
    • use for troubleshooting type things

Forwarding

move packets from a routers input link to appropriate output link

Routing

Routers

IP addressing

IPv6