The Internet and the Worldwide Web Flashcards
What is the internet?
It is the physical infrastructure of all the computers networked together around the world
How does the internet send data?
using “packets”
What does www stand for?
World Wide Web
What is the world wide web?
information space that sits on top of internet
What does URL stand for?
Uniform Resource Locator
What does OSI stand for?
Open System Interconnection
What is OSI?
set of standards describing the different layers of communication
What are the stages of the TCP/IP Model?
- Physical Layer
- Datalink Layer
- Network Layer
- Transport Layer
- Application Layer
What happens in the physical layer?
Means of transmitting raw bits
wired/wireless
e.g. wifi ,bluetooth,USB
What happens in the data link layer?
creates frames made of packets
What happens in the network layer?
creates packets
uses IP address to find packet sources and destinations.
What does IP stand for?
Internet Protocol
What does IP do?
Has destination address in it
doesn’t know who to send it to
What happens in the transport layer?
Establishes the connection between applications running on the different host
Uses TCP for reliable connections
Uses UDP for fast connections
What does UDP stand for?
User Datagram Protocol
