Chapter Extension 8 Flashcards
computer network
a collection of computers that communicate with one another over transmission lines wirelessly
local are network (LAN)
connects computers that reside in a single geographic location on the premises of the company that operates the LAN
wide area network (WAN)
connects computers at different geographic locations
protocol
set of rules that programs on two communicating devices follow
internet
network of networks
ethernet
specifies hardware characteristics, such as which carries which signals
describes how messages are to be packaged and processed for wired transmission over the LAN
internet service provider (ISP) functions
- provides you with a legitimate internet address
- serves as your gateway to the internet
- ISP’s pay for the internet
internet service provider example
Time Warner
AT&T
digital subscriber line (DSL)
operates on the same line as voice telephones but does not interfere with the telephone service
three ways to connect your LAN to the internet
Digital Subscriber Line
Cable Line
WAN wireless connection
IP address
a number that identifies a particular device
domain name
a worldwide-unique name that is affiliated with a public IP address
URL
uniform resource locator
three-tier architecture
user tier
server tier
database tier
service-oriented architecture (SOA)
all interactions among computing devices are defined as services in a formal, standardized way
