lecture03: Internet Design Principles

This lecture covers Internet Design Principles and TCP/IP

Topics covered

• Lecture goals/outline
• The ``Internet''
• Standards
• Network Standards Bodies
• IETF
• RFCs
• Some Important RFCs
• Internet Design Principles
• Packets vs circuits
• Robustness principle
• Layered protocols: OSI model
• Encapsulation
• Layer 1: Physical layer
• Layer 2: Data-link layer
• Layer 3: Network layer ***
• Layer 4: Transport layer
• Layer 5: Session layer
• Layer 6: Presentation layer
• Layer 7: Application layer
• Post office analogy
• TCP/IP has 5 ``layers''
• TCP/IP Encapsulation
• IP header
• TCP header
• TCP/IP operation
• Narrow Waist of IP: hourglass
• Broken layering
• End-to-end principle
• Distributed control
• Deployment issues
• Network scale
• IP is not all good
• Layer 3 view of the Internet
• Addresses
• Routing vs Forwarding
• Forwarding
• Route Loop