CS 111: Week 4 Notes
Script
JavaScript can be included in an HTML file using these tags in the head
IEEE 802.11
Wi-Fi is a word referring to a wireless computing networking standard
Web
a European researcher developed a more convenient way for computer to communicate files
Cell
a cellular network is dispersed over a lange area, which is broken up into smaller areas
Ethernet
a modem typically connects to a computer using this communication protocol
Switching (or handover)
a phone must receive a signal from a different tower at a different frequency
Web-search matching criteria
a search engine determines the "best" matching pages
Using quotes
as in "circle of knowledge", researches for exactly those words in that order
Forwarding
automatically redirects a domain's visitor to a target URL
Yahoo!
began in 1994 by Stanford graduate students Jerry Yang and David Filo, and was originally just a hierarchical directory of websites that Jerry and David like, rather than a search engine
began in 1998 by Stanford graduate students Larry Page and Sergey Brin, as a research project related to search
CSS color
can be pre-defined name as in color:blue, or an rgb value as in color:rgb(50, 100, 255)
DNS server
converts te domain name to an IP address
Cisco
is the largest make of the Internet routers as of 2015, and also one of the oldest router companies, started in 1984 by a married couple employed as a computer staff at Stanford, who built a device so they could send each other email
URL (Uniform Resource Locator)
is the location of a file on the web
Internet
is the most popular (but not the only) computer network today
Cybersquatting
is the practice of registering a domain name in the homes of selling later for profit
Web browser
like Chrome, Firefox, Safari, or IE reads an HTML file and displays the page
Including filetype
limits results to file that type
Static IP address
meaning the address doesn't change
Index
of words pointing to specific pages
Link
on a web page is text that can be clicked to jump to another web page
Http
part of the URL refers to hyper-text transfer protocol used for communicating web pages
Modem (short for "modulator/demodulator")
performs the required combining/uncombining of computer data and electrical signals over an ISP's line
Browser
program; for viewing HTML files
Hotspots
publicly accessible Wi-Fi networks
Including site
restricts searches to domain with the ending
Bing
search engine that was released in 2009
Searching on scholar.google.com
searches academic articles rather than the web
Web search
seeks web pages that best match user-typed words
Modulation
sending a computer's data thus requires electrically combining with a different electronic signal capable of travelling over the ISP's line
HTTP protocol
set of rules; transferring HTML files among computers
Deep web
sites on the Internet that are hidden from common search engines
Transmission Control Protocol(TCP/IP)
some rules are commonly added to the Internet Protocol
HTTP
stands for hyper-text transfer protocol
Top-level domains
such as .com, .net, .org, .edu, and .gov
Second-level domain
such as wikipedia in wikepedia.org
HTML
text files; containing link to other text files
Tags
that indicate formatting, links, or other items
Internet Protocol (IP)
the basic low-level rules for communicating data over the Internet
IPv4
the original Internet Protocol; has 32-bit addresses
Www
the web was originally called the World Wide Web
IPv6
uses 128-bit addresses
Wi-Fi router
uses wireless technology to communicate with computing devices over short distances of up to 66 feet (20 meters)
FTP (file transfer protocol)
was an early way for transferring files; where a user would login to another computer, and then type commands to copy specific files among the computers
Dynamic IP address
which changes frequently
Internet Service Provider (ISP)
which is a company that provides connections to the Internet, typically via cable lines, digital phone line (DSL, or digital subscriber line), or satellite
Airplane mode
which stops the antenna from looking for cell towers
Function
is a named program portion that can be run by referring to that name
Cellular network (or mobile network)
is a network primarily used for communication whose endpoint is a wireless cellular device
Web crawler
is a program that pre-visits web pages to build an index
JavaScript
is a programming language that runs in a browser, enabling web pages that support actions like a responding button click
Router
is a specialized computer in a network that receives a packet form a computer/router and sends that packet to another computer/router on a path towards the packet's destination
HTML (hyper-text markup language)
is a textual language for creating web pages
Search engine
is a website that does web searches
Domain name
is an easy-to-remember name for an IP address, like cnn.com
Router
is commonly placed after a modem to route packets from the ISP's line to the appropriate computer among many in a home/office
DNS
is short for Domain Name System
Rgb
is short for red, green, blue
Https
is similar to http but uses encryption for secure transfers such as passwords or credit card numbers
Default search engine
is the engine browser initially uses for search done via the browser's search box or URL box
Marked forwarding
does not reveal the target URL when forwarding
ICANN (Internet Corporation for Assigned Names and Numbers)
domain names and IP addresses are manage by this
Cell towers (or base station)
each cell contains one or more of these; which provide an interface between wireless devices and wired devices
404
error message, which is a code number for page not found
Computer networks
evolved in the 1960s to allow computers to communicate information with each other
Using a minus
excludes sites that have that word
Packet
how a computer communicates; containing information like an address for a destination computer, the data size, and the data itself
Hyper-text markup language
hyper-text means the text has links to other text
Domain name registrar
is a company authorized to reserve domain names
Web host
is a company that provides web servers that store web content and serve that content over the web
IP address (short for Internet Protocol address)
is a computing device's unique address on the Internet (like a house's unique address in the world)
Internet
is a connection of billions of computers using the Internet Protocol's communication rules
The last mile
is a figurative term that describes the last portion of the telecommunication network that connects service to customers
CSS (short for Cascading Style Sheets)
is a language that can be used to style a web page via changes in colors, sizes, spacing, fonts, and more
Domain name
is a name for an IP address