LEARNING UNIT 3: CHAPTER 7
NETWORK, THE INTERNET, AND THE WORLD WIDE WEB
Internet backbone network: a highcapacity and high-speed computer network that carries
large amounts of Internet traffic across regions, countries, and continents
local area network (LAN): a small computer network typically spanning a single home, small
office, or one floor of a building
World Wide Web (WWW): an interconnected set of resources accessed via the Internet
Uniform Resource Locator (URL): identifier of a Web resource containing a protocol header,
server name or address, and resource name
Hyperlink: the URL of one Web resource is embedded within another Web resource
application software: software that performs user- or business-specific tasks and is typically
constructed as an app or Web-based application
app: application software that is installed on the storage device of a computer or cell phone
system software: software, such as operating systems and Web server software, that works
behind the scenes to support application software and control or interact with hardware or
software resources
Web-based application: application software that uses a Web browser as the user interface,
has a URL for application access, uses a Web server and server-side software components,
and uses Web standards for communication between Web browser and server
, WEB-BASED APPLICATIONS
PROTOCOLS
A protocol is a set of languages, rules, and procedures that ensure accurate and efficient data
exchange and coordination among hardware and software components
Network Protocols
o Enable accurate message transmission among the various computers and software
components. They function as the “plumbing” that enables messages to find their
way from sender to recipient, enable multiple devices to efficiently share wireless
and wired connections, and handle tasks such as identifying and retransmitting lost
messages.
virtual private network (VPN): secure communication over the Internet using technologies
that reliably identify senders and recipients, and encrypt network messages sent among
them
NETWORK, THE INTERNET, AND THE WORLD WIDE WEB
Internet backbone network: a highcapacity and high-speed computer network that carries
large amounts of Internet traffic across regions, countries, and continents
local area network (LAN): a small computer network typically spanning a single home, small
office, or one floor of a building
World Wide Web (WWW): an interconnected set of resources accessed via the Internet
Uniform Resource Locator (URL): identifier of a Web resource containing a protocol header,
server name or address, and resource name
Hyperlink: the URL of one Web resource is embedded within another Web resource
application software: software that performs user- or business-specific tasks and is typically
constructed as an app or Web-based application
app: application software that is installed on the storage device of a computer or cell phone
system software: software, such as operating systems and Web server software, that works
behind the scenes to support application software and control or interact with hardware or
software resources
Web-based application: application software that uses a Web browser as the user interface,
has a URL for application access, uses a Web server and server-side software components,
and uses Web standards for communication between Web browser and server
, WEB-BASED APPLICATIONS
PROTOCOLS
A protocol is a set of languages, rules, and procedures that ensure accurate and efficient data
exchange and coordination among hardware and software components
Network Protocols
o Enable accurate message transmission among the various computers and software
components. They function as the “plumbing” that enables messages to find their
way from sender to recipient, enable multiple devices to efficiently share wireless
and wired connections, and handle tasks such as identifying and retransmitting lost
messages.
virtual private network (VPN): secure communication over the Internet using technologies
that reliably identify senders and recipients, and encrypt network messages sent among
them
