The Internet: Connecting Networks Flashcards
What is the world’s largest computer network
the internet
computer network
group on interconnected computing devices capable of sending or receiving data
computing devices
any device that can run a program
examples of computing devices
tablet computer phone sensor, etc.
how many devices is the simplest computing network
two devices
what does a network need to work
have a way to physically connect and how to send data in a format where all the devices can understand
network topology
the different arrangements of devices in a network
Local Area Network
network that covers a limited area like a house or school
what is the most common type of network
local area network
what is the largest type of network
wide area network
wide area network
network that extends over a large geographic area and is composed of many local area networks
how can the networks in a WAN (the local ones) be connected
with leasing telecommunication lines
do the LANs in a WAN have to have the same network topology
no
LAN stands for
local area network
WAN stands for
wide area network
what are the different types of networks
DCN
LAN
WAN
DCN stands for
data center network
data center network
network used in data centers that need to exchange data super fast
what type of network is the internet
wan
in order for devices to communicate over the internet (newtwork) what do they need to follow
internet networking protocols
do all networks use the same protocols
no, some use protocols that are tailored to their purpose
internet
group of connected networks
network
group of connected devices
protocol
a system of rules that explain the correct conduct and procedures to be followed. Basically it’s something that tells the programs how to properly behave so that they can do their tasks correctly.
list the physical connections of networks in the internet
copper cables
twisted pair cable
fiber optic cables
wireless
how do twisted pair cables send data through the network
by transmitting pulses of electricity that represents binary data
what was the earliest known physical connection between networks in the internet
copper cables
what must be followed to ensure that cables are ensuring info that can be understood by the networks
ethenert standards
twisted pair cables aka
ethernet cables
example of where LAN is used
company office
example of where WAN is used
country
how do Fiber-optic cables
send data through the network
by sending pulses of light that represent binary data
structure of Fiber-optic cables
optical fiber that can carry light (instead of electricity). The fiber is coated with plastic layers and sheathed in a protective tube to protect it from the environment
how do fibre optic cables ensure that they are sending data that can be understood by all of the devices in the network
by following Ethernet standards
what is better at transmitting data fibre optic cables or copper cables
fibre optic
what do wireless connections include
nothing - no wiring
how do wireless connections work
1- a wireless card in the computer turns binary data into radio waves
2- the binary data is vroomed shot through the air
3- the radio waves of binary data travels long or short distance (depends on obstacles)
4- waves are picked up by a wireless access point which converts the binary data to radio waves to binary data again
can wireless connections access everywhere
no - limited bc of obstacles like buildings
issue of wireless connections
slower irl
issue of twisted pair copper cables
prone to interference
issue of fibre opric cables
expensive
wireless connections send data through ___
radio waves
twisted pair copper cables send data through ____
electricity
fiber optic cables send data through ___
light
rank the connections from can connect most distance (furthest) to least :
wireless, fiber optic, twisted pair copper
twisted pair copper
wireless
fiber optic
WAP stands for
wireless access point
wireless access point
device that allows you to connect wirelessly to internet
router
device that allows ALOTTT of devices to wireless connect to the internet
requirement of network topologies
there must be a way In which data can continuously flow through all of the devices
computing devices
a physical device that run a program
. All computing devices have ways to store data for later use.
true or false
false
. All computing devices are capable of being interconnected to form computer networks.
true or false
false
how is data communicated (language)?
binary
how are computers able to send messages with only one wire
there are pulses that each show smth in binary (so either 0 or 1)
what must computing devices agree on for data to transfer to each other
the time period
line coding
process of turning binary data into a time based signal
bit rate
speed of which network connections send bits
megabit
1 million bits
bandwidth
measurement of how much data can be transferred in a fixed period of time.
broadband internet
connection with a minimum bandwidth of 256 Kbps (kilobits)
what an broadband internet be used for
checking emails + websites but not watching videos
latency
time between the sending of a data message and the receiving of that message
latency is measured in what
milliseconds
how to calculate latency
add the number of milliseconds it takes for a computing device’s message to be sent to another computing device, and the amount of time it takes for the og device to be notified that the msg was recieved
Speed is made of
bandwidth and latency
bandwidth units:
__bit per __second
data transferred is measured in what
__bits
how to calculate bandwidth
its js the max amount –> so if given a chart with bps then js look for the biggest one
