Week 5 and 6 Flashcards
What is copyright
your rights to control your works of creative expression
Happens as soon as the pen leaves the paper!
if you created something what do you have to do to own the copyright
you own the copyright by default
You don’t have to do anything
what happens if you create something while working for a company
the company owns it
what can you copyright
Anything you created that is TANGIBLE (a tangible medium of expression) Eg. drawing vs a song in your head Photographs, drawings Music Sculptures
changing a design 20% means that you can use it t/f
false
if you created it, once your pen is off the paper you own!
what can you not copyright
words or names
Not ideas
why cant you copyright words or names
those are trademarks
you cant copyright ideas because
thats a patent
what is a network
a group of interconnected computers (could be connected with wires, wirelessly, satellites)
eg western has a network of computers that talk to eachother
what are the pros and cons of having one centralized computer connected to all other computers in the network
Con: if a side computer wants to to get to another side computer, it must first go through central computer.
if something happens to central computer… network is screwed
Pro: simple layout and you only have to keep all info on one machine
if one of the side computers goes down, it doesn’t affect all other machines in the network
what are the pros and cons of having a peer to peer connected network (where each computer is connected to two other computers, kind of forming a circle)
everyone is on the same level
Pros: if one computer goes down, there is a secondary path for the other computers, just going the other way around in the circle
Cons: if two computers go down, then you can’t access all computers - not the most reliable system
what are the pros and cons of each computer being connected to all computers in the network
when was this WEBBED network created
Cons: Overkill
Pros: very reliable, connected to everything
1969
What is the internet
a global system of interconnected computer networks that use the standardized Internet Protocol Suite (TCP/IP) to serve billions of users worldwide
a network of networks
hardware
is the internet HARDWARE OR SOFTWARE
hardware… World Wide Web is software that RUNS ON INTERNET
when was the internet started and what was it originally called
who funded it originally
Called the ARPANET originally and it was created in 1969
The ideas behind this protocol were funded by the Advanced Research Projects Agency (ARPA) of the US Department of Defence (DoD) (around 1969). Thus the Internet was originally call the ARPANET
what does the internet use
uses TCP/IP
TCP/IP has no direct line at the outset of the message! If a communication line is broken, another line is tried.
A standard protocol (way of communicating),
Opposite of your home telephone where you get a direct line that only you and the person you are talking to can use.
what is circuit switching
one single line and only one person can use it at a time to transfer information between one place to another
like old telephone lines
how does the internet work using TCP IP
describe process
- it breaks things down into packets
tcp takes the info (eg email) and breaks it down into packets (all of equal size)
each packet has a header (where theyre coming and where are they going - IP address of source and destination) and a body containing the information transferred. - tcp then sends it out to the internet, sending the packet to the first IP Address on the route… were each packet can take various routes but the all end up at the same location
TCP DOESNT PREPLAN ROUTE - tcp reassembles the info as it arrives at the destination
what is a packet
a small group of bytes consisting of a header (tells where it is going: destination and where it came from: source) and the body. (Often 64 bytes for header and 512 bytes for body)
how large is the packet header and body
(Often 64 bytes for header and 512 bytes for body)
what is the protocol (internet)
rules for the format and transmission of data
What does TCP do at the sending end
Take a large chunk of data (such as a webpage, email message, etc) and breaks it into small packets
Sends the packets out on to the Internet
What does TCP do at the receiving end
Detects lost packets, packets with errors because of network congestion, traffic load balancing, or other unpredictable network behaviour, and requests the packet to be resent from the source
Rearranges and reassembles the packets back into the webpage, email message, etc on the receivers machine
describe packet switching
TCP breaks webpage into packets of bytes
TCP figures out IP address of where it wants to send the packets (destination)
TCP figures out IP address of where the packet is coming from (source)
Sends off each packet to first machine (IP Address) on the route (DOES NOT PREPLAN ROUTE!)
Packet stops at first machine, likely a router, then the router sends it to the next machine on the journey (IP Address) and so on until it gets to the final IP Address (destination)
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