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.