This course is about computer network, and mainly cover the following topics:

• Internet and IP
  • How an application uses the Internet
  • The structure of the Internet:The 4 layer model
  • The Internet protocol(IP):What it is
  • Basic architectural ideas and principles
    • Packet switching
    • Layering
    • Encapsulatior
• Transport
  • Three Transport Layers:TCP,UDP,ICMP
  • How TCP works:Connections and Retransmissions
  • How UDP works
  • How ICMP works
  • The End to End Principle
• Packet Switching
  • Queueing delay and end-to-end delay
  • Why streaming applications use a playback buffer
  • A simple deterministic queue model
  • Rate guarantees
  • Delay guarantees
  • How packets are switched and forwarded
• Congestion Control
  • Principles
    • What network congestion is, what causes it, and what happens in routers
    • How we want the network to behave when congested: max-min fairness
    • AIMD: additive increase, multiplicative decrease
    • Behavior of multiple AIMD flows and TCP throughput equation
  • Practice
    • TCP Tahoe, Reno, and New Reno
    • Congestion window
    • Slow start, congestion avoidance
    • RTT estimation
    • Self-clocking
    • Fast retransmit, fast recovery, congestion window inflation
• Applications and NATS
  • NAT
  • DNS
  • Http
  • BitTorrent
• Routing
  • Approaches
    • Flooding
    • Source routing
    • Forwarding table
    • Spanning tree
  • Algorithms
    • Bellman‐Ford "distance vector" algorithm. Used by RIP.
    • Dijkstra’s shortest path first “link state” algorithm. Used by OSPF.
  • Internet routing
    • Hierarchical routing
    • BGP - path vector routing and local polices
    • Multicast routing
    • Spanning Tree Protocol(STP)
• Lower Layers
  • Ethernet and CSMA/CD
  • IP Fragmentation
  • Wireless networks
    • Why they are different
    • Sharing the channel
    • WiFi
  • Bit errors and coding
  • Error correcting codes
  • Shannon Capacity
• Security
  • Attacks
    • Eavesdropping, tampering, suppression
    • Spoofing, man-in‐the-middle
    • Redirection/hijacking at layers 2, 3 and 4
    • Denial of service
  • Principles
    • Confidentiality
    • Integrity
    • Authenticity
  • Tools
    • Block ciphers(EBC mode, CBC mode)
    • Cryptographic hashes: collision resistance
    • Message authentication codes
    • Public key encryption/decryption
    • Signatures and certificates