Class 1 & 2

• everything we should do should dissappear.
• Xport -> power 3.3v -> in / your I/O pins are 5v.
• Serial:One at a time, Serial vs. Paralel.
• Synchronous: any chip without clock, cannot be master -> SPI(arduino site) ->IPC vs. Asynchronous: They do have their own time.
• What languages they speak? Find a common language to those.
• DataLink Layer (Ethernet) -> Ascii Table, Most network layers use ASCII. We can just telnet to www.google.com 80 and run this command GET /index.html HTTP /1.1
• Network Layer(IP) -> ITP all calls come to device called router and all the machines that’re connected called subnet.
• Hub vs. Switch / DHCP - Analogy of big assed serial cable over networks.
• Tx / Rx -> Split the cable put an amplifier to share the serial data in parallel.
• Transport Layer -> TCP-socket connection/dedicated connection between two devices.
• IP address and port number needed to open a socket connection. TCP protocol depends on the socket protocol. Protocols limits the port numbers.
• UDP -> send out a message, forget about it. Much faster, realtime transfer.