wired/ wireless networks, network and topologies Flashcards
what are the advantages of the cloud (2)
cheap, reliable most of the time
what are the disadvantages of using the cloud (4)
security easily accessed, can be slow, doesn’t work if not connected to a network, malware easily spread
what are the 5 factors that can affect a network
number of users
latency
bandwidth
error rate
transmission media
how can the number of users affect network
too many causes bandwidth to run out
how can latency affect network
delay from transmission media to recieve it. causes bottlenecks in the infrastructure of the network
how can bandwidth affect network
amount of data that can be sent and recieved successfully in a given time
how can error rate affect network
data has to be resent until its sent correctly
how can transmission media affect network
wired connections have higher bandwidth than wireless connections
what do switches use for routing data to a LAN
and what does this do
MAC address
provides unique physical address for a device enabling it to connect to a local network
what does the ethernet mean
when data is transmitted in frames over a LAN
standard for communicating over a LAN
devices on wireless networks transmit and receive data on specific radio …
frequencies
what 2 components are all the IP addresses made up of
network and host
what is needed for an encryption to work on WiFi
a Key
what’s the difference between star and mesh networks
computers in mesh have more than 1 route for data to travel
what hardware sends data across networks. what else does it do for LANs
router
connects them to the internet
what is the purpose of Domain Name Server
DNS
translate a URL (web address like google.co.uk) to an IP address
out of wifi, partial mesh, full mesh, and star which one if the most resilient to faults
full mesh
in a mesh are all devices connected
yes
describe what a network topology is
the way devices are laid out in the network
```
what is a node in topology
an electrical device
in a star network what do all devices connect to
a switch
3 positives to use star network
1 negative to use star network
- new nodes easily added
- a node has a technical issue - rest of network unaffected
- data collisions rare
1.expensive due to the many cables
purpose of MAC address??
gives unique physical address so device/node can connect to LAN
1 positive to using mesh network
2 negatives to using mesh networks
- data routed around high traffic parts of the network - many routes
- expensive
- faults go unnoticed until there are too many
