Internet
the attempt to gain sensitive information such as usernames, passwords, and credit card details through a combination of email and fake websites.
Phishing
14
1110
error that results when the number of bits is not enough to hold the number.
E.g. trying to represent the number 16 with 4 bits, shows up as 0000
overflow
Maps domain names (e.g. google.com) to IP Addresses like 4893.2849.2383.0032. It is a hierarchical decentralized naming system for computers and servers connected to the Internet.
DNS (Domain name system)
77
1001101
error that results when the computer approximates decimal numbers, due to imprecise floating point representation.
E.g. 3 digits to represent π as 3.14 or representing 2/3 as 0.66667
round-off error
The observation that the number of transistors on a chip doubles every two years, and that computer speeds and processing power doubles around every two years.
Moore's Law
01001110
78
Compressing data in a way that preserves all data away and allows full recovery of the original.
Used for compressing source code and archiving media.
lossless compression
Develops standards and protocols for Internet communication. They meet in person three times per year and are open to the public.
IETF (internet engineering task force)
10011
19
The last date accessed, file size, and file format.
Metadata
The idea that some communities have less access to computing than others. Especially true for poor people, the elderly, those living in rural communities, etc.
Digital Divide
Convert to Binary
1C
11100
Compressing data in a way that throws some data away and makes it almost impossible to recover the original.
Used for images, music.
lossy compression