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1. Client Servers vs. Peer 2 Peer
   
   1. G,I – client Server
      
   2. Fileshare – Peer 2 Peer
      
   3. Cell phone / pda – web services - information
      
2. Topologies
   
3. Network
   
   1. Repeaters
      
      1. No intelligence
         
      2. Only operating at the physical level
         
   2. Hubs
      
      1. Broadcasts to all devices on networks
         
   3. Switches
      
      1. Looks at the MAC
         
      2. More intelligent
         
      3. Communicates only with MAC device
         
   4. Bridges
      
      1. Link two different protocols
         
      2. Mostly works in the MAC layer
         
   5. Router
      
      1. Network layer
         
      2. Congestions, flow control, condition
         
      3. Static | dynamic
         
      4. Routers can communicate to other routers
         
      5. What is the shortest route
         
      6. What is the optimal route
         
4. Media Access
   
   1. Polling – how am I going to get access | one server is going to back to see if they have something to send back
      
      1. Server based or end point based (telephone)
         
      2. Token based | if the token is free you can communicate | otherwise have to wait to send data    
         
   2. Collision
      
      1. CSMA / CD - Ethernet
         
      2. CSMA / CA - Wi-Fi