The OSI model (Open Systems Interconnection)
Table of Contents
The OSI model (Open Systems Interconnection)
The OSI model
Layer 1 - Physical Layer
Layer 2 - Link Layer
Layer 3 - Network Layer
Building networks
Slide 7
Slide 8
Slide 9
The Hourglass Model
The Internet Protocol (IP)
IP Datagram Structure
IP Addresses / IP Numbers
IP numbers (continued)
What is forwarding?
What is a router?
What is a router? (Contd)
What happens when a router receives a datagram?
Forwarding is hop-by-hop
Using prefixes for forwarding
Allocating IP numbers on an Internetwork
IP allocation example
Subdividing prefixes
Subdividing prefixes: example
Example (contd)
Example (contd)
Example (contd)
Example (contd)
Example (contd)
Dividing Prefixes - class example
Aggregation Tree
Aggregation Tree (contd)
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