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20 Cards in this Set
- Front
- Back
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Moore's law
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computing power doubles every 18 months
limitations: size, heat, power number of transistors on chip > computing power > fixed cost (it has a approached its limit) |
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computer software def; name the three kinds of computer software
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pc program or collection or programs that tell the hardware what to do
THREE KINDS OF COMPUTER SOFTWARE: application systems (operating systems software) programming |
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application software; what is the diff between desktop software and enterprise software?
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perform work users and firms are directly interested in accomplishing
desktop software: apps installed on a personal pc ---MS office, web browsers, photo editors enterprise software: apps that address the needs of multiple, simultaneous users in an org ---ERP, SCM, CRM, collborative programs (wikis) |
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programming software
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an iintegrated development environment to write code
text editors debugger for finding errors compliter to turn human readable codes into ones and zeros |
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service oriented architecture
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strategy that builds all software assets in the company using service oriented programming methodology
SOA is also a way of designing systems that enables: cost efficiency agility and adaptability leveraging of legacy investments (by building systems capabilitys as resuable, composable, and discoverable services) |
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wahate are three advantages of SOA?
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software reuse
productivity increases increased agility |
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what at the three advantages of SOA STRATEGY
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better alignement with business
better way to sell architecture to the business |
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web services
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systems designed to support interoperatble machine to machine interaction over a network
---returning a calculation (sales taxes for an order) ---assessing database programs (results u searched for) ---making request to a server (verify customer's credit card number) |
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what is a LAN?
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local area network: pc network coverin small geo area
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what is a PoP?
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point of presence: place for local users to access a network
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what is a NAP?
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network access point: where large networks interconnect
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what do routers do?
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send messages over th net
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Internet protocols
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language pc's use to communicate over internet ; has task of deliverin packets from source host to hte destination host solely based on its address
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what is TCP?
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transmission control protocol: defines how datat are transmitted
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IP address?
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to establish link with a pc on web, need to know its IP address
unique number that IDs a machine on internet 32 bit numbers |
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domain name systems
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maps text names to IP addresses automatically
DNS serviers translate human readable domain names into machine readable IP addresses www.howstuffworks >> 70.42.251.42 |
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cloud computing
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situation in which computing is done in a remote location (out in clouds) rahter than on desktop or portable device
software as a service |
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give examples of things that are sofware as a service
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on-demand CRM
google docs flickr turbo tax online |
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what are some benefits of SaaS
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saves upfront costs of buying software
variable operating costs mitigate financial risks easy to scale (vendor's responsible for meeting fluctuations) better quality (vendors handle backups, upgrades, etc) low cost of dist (wo middle man) |
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what are some risks of SaaS
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heavy dependence on vendors
startup vendors unlilky to survice forced into adopting new versions reliance on network connection (disaster recovery...) cititcal data assets outside firm (security issues) less flexible with configureation |
