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| What is a virtual machine? |
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A virtual machine (VM) is a software implementation of a machine (i.e. a computer) that executes instructions (not programs) like a physical machine.
(ex. Angel, Web Advisor. Not a dedicated piece of hardware for each one. Now we put a group of pieces and shuffle for a load balance. Operating systems not running on hardware.) |
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| fundamental software we need to do anything. (Can't run without devices) It's a utility\support items |
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| 1 step up above bianary. IT's hard to work with but it's human understandable. |
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| Help you get through but not user friendly. No mouse\keyboard |
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| How it works and manages resources*** |
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| suppose to have elevated root priveledge to do more. ex) Able to install software-viruses go away when you can't upload software without the authority. |
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| Teeter Totter Effect (Can't have both high) You can have both low security and usability, and vice versa of the two. |
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| Better Performance for future. (Read More) |
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| Collection of web servers and web pages. Applications that run over the internet. 1 thing that runs off of the internet. |
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| Fundamental Software\Carries many different things. (FOUNDATION!) |
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| Computer Networks can connect through this |
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| Shared Medium\Shared with neighbors Lose privacy and if everyone is on it slows down |
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| Private cable from computer to source of internet |
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| PPI don't want wired infrastructure. Shared medium again. Slows down with more people. Limited\not private. |
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| You can use dial up if you're too far out to get internet |
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| Run cable between wireless antena(access point for jumping on) |
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| other people can hear-if its cut, it separates (can't communicate with one another) |
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| A bus top that is tolerant of single access if failures. |
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| The best. If you can set up to pull in direct links to a central switching loacation-it is the best setup. If a link is broken chances is only house cut off or one area instead of all of them. |
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| Ethernet can only run so far. Cant run something like Ethernet because things are too far away |
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ex) Windstream does not connect to internet
Windstream connects to a regional ISP who connects to a nation ISP |
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| Rules, used to allow compliance. How you organize of data. Have agreement on these. |
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| Computers run best with numbers. Name to Number (IP Address-numerical computer understandable address) [Only unique locally. International are one of a kind in the whollle nation!) |
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| getting info from place to place. There are procedures used to find lowest cost (amount of time used) |
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| Client Service Network*** |
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HOw you show who you are over a network
this is a nontrivial problem-may not have perfect solution
(Ex. Fingerprints) |
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| laptop uses scanner of fingerprint or photo |
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| carefully customizes 1 message to 1 person instead of group. (Virus) |
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| Pg 400, be familiar with defense*** |
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| things aren't in plain text-credit card number. |
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| We want something interpretation like Python-no bianary Pg 453** |
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| Trivial does not equal bad |
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| Ask they what you want to make sure they do what you want |
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| Don't jump straight to code |
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| Just because it runs doesn't it run doesn't make it most efficient program it could be. |
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| Comments in code to show what's going on in the program |
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