1. IT 347 Final Review Winter 2011 J.J. Ekstrom

2. IT 347 Course Topics Network Models Protocols and Encapsulation Reliable Delivery / Sliding Window Clients, Servers and Sockets Layer 2 Layer 3 The BIG I Network Management

3. Network Models Node, Link, Channel, Cloud Bandwidth, Throughput, Latency, Volume, Jitter, Round Trip Time OSI Internet

4. Protocols and Encapsulation Ethernet IP UDP TCP

5. Reliable Delivery Sliding Windows for Packets (Layer 2) Sliding Windows for Byte Streams (TCP)

6. Clients and Servers Socket Programming / Client-Server Threads and Asynchronous I/O HTTP / Web Server

7. Layer 2 Standards 802.1D, 802.1Q Layer 2 Forwarding Learning Bridges Spanning Tree Virtual LANS

8. Layer 3 Standards: IETF RFCs Routing Distance Vector Link State Gateways (routers) between networks Interior and Exterior Gateways

9. The BIG I History: ArpaNet, NSFNet Internet Service Providers (ISP) The issue of trust BGP-4 Peering Points Whose interests are being protected by whom?

10. Network Management HTTP SNMP Console Control Variables Standards: De facto Microsoft SMS, HP, IBM Tivoli… De jure DMTF, IETF, ISO, …

11. Security Public Key Infrastructure Signing Encrypting Certificate Authorities

12. Tunnels Any layer on any layer Overhead issues Security issues Many types with many characteristics

13. MPLS Multi-protocol Label Switching Management of Multiple use backbone Mainly for Provider convenience Big bonus is traffic engineering Fast switching with decision made at ingress edge router. Can be used for tunneling.

14. Questions?