Presentation on theme: "Conceptual Understanding of the Internet Hain-Lee Hsueh EDUC 328X."— Presentation transcript:
Conceptual Understanding of the Internet Hain-Lee Hsueh EDUC 328X
First: How does data travel on the Internet? Internet
US Postal System Stanford Each office manages a local network of places How does a letter get from Stanford to South SF? South SF USPS is a network of place networks
The Internet Place = a computer Post office = router A router manages its local network of computers network of computer networks The Internet is a… Why is it called the Inter - net?
WHAT HAPPENS WHEN I GO TO A WEBSITE?
Consider a large lecture… This is BobAlice Bob wants her # Creeper with the seating chart Digits please My # Seat H12 Seat A3
Accessing a Website f f Browser Client Server DNS facebook.com request response Domain Name IP address
Can you map the objects/entities between the lecture hall and the Internet? Digits please My # Client Server Part of the Internet DNS Request Response Seat H12 Seat A3 Domain Name IP address Alice
Sometimes things dont work out What might cause delays? What might cause these errors? – Error 404: Not Found – Error 403: Forbidden – Error 503: Service Unavailable – Oops! Google Chrome could not find … FYI: – Error 4xx means issue with client – Error 5xx means issue with server