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Network Layer - Coggle Diagram
Network Layer
IP
Tunneling: 6 - 4 - 4 -6
DHCP:reuse
NAT
IP datagram
MTU (link layer)
fragmentation
Control Plane
network-wide logic
determine how datagram is routed among routers along end-end path from source host to des host
two approach
traditional routing algorithms: implement in routers
software-defined networking(SDN): implement in remote server
Data plane
local,per router
determine how datagram is forwarded with router
Router
Architect
Control plane: routing processor
Data plane : switching fabric
use forwarding table
destinationed-base fwrd: IP
longest-prefix matching
generalized forwarding: any header
queueing when too many seg arr
Scheduling
FIFO + tail drop
priority : class
Round Robin
Weighted Fair Queuing
switching fabric
memory (CPU + main memory)
bus
crossbar
Encapsulate segments into datagrams
Forwarding:move packets from router's input to appropriate output
Routing: determine route taken by packet from source to des