wired/ wireless networks, network and topologies

Question 1

what are the advantages of the cloud (2)

Answer 1

cheap, reliable most of the time

Question 2

what are the disadvantages of using the cloud (4)

Answer 2

security easily accessed, can be slow, doesn’t work if not connected to a network, malware easily spread

Question 3

what are the 5 factors that can affect a network

Answer 3

number of users
latency
bandwidth
error rate
transmission media

Question 4

how can the number of users affect network

Answer 4

too many causes bandwidth to run out

Question 5

how can latency affect network

Answer 5

delay from transmission media to recieve it. causes bottlenecks in the infrastructure of the network

Question 6

how can bandwidth affect network

Answer 6

amount of data that can be sent and recieved successfully in a given time

Question 7

how can error rate affect network

Answer 7

data has to be resent until its sent correctly​

Question 8

how can transmission media affect network

Answer 8

wired connections have higher bandwidth than wireless connections​

Question 9

what do switches use for routing data to a LAN
and what does this do

Answer 9

MAC address
provides unique physical address for a device enabling it to connect to a local network

Question 10

what does the ethernet mean

Answer 10

when data is transmitted in frames over a LAN

standard for communicating over a LAN

Question 11

devices on wireless networks transmit and receive data on specific radio …

Answer 11

frequencies

Question 12

what 2 components are all the IP addresses made up of

Answer 12

network and host

Question 13

what is needed for an encryption to work on WiFi

Answer 13

a Key

Question 14

what’s the difference between star and mesh networks

Answer 14

computers in mesh have more than 1 route for data to travel

Question 15

what hardware sends data across networks. what else does it do for LANs

Answer 15

router
connects them to the internet

Question 16

what is the purpose of Domain Name Server

DNS

Answer 16

translate a URL (web address like google.co.uk) to an IP address

Question 17

out of wifi, partial mesh, full mesh, and star which one if the most resilient to faults

Answer 17

full mesh

Question 18

in a mesh are all devices connected

Answer 18

yes

Question 19

describe what a network topology is

Answer 19

the way devices are laid out in the network

Question 20

```

what is a node in topology

Answer 20

an electrical device

Question 21

in a star network what do all devices connect to

Answer 21

a switch

Question 22

3 positives to use star network
1 negative to use star network

Answer 22

1. new nodes easily added
2. a node has a technical issue - rest of network unaffected
3. data collisions rare

1.expensive due to the many cables

Question 23

purpose of MAC address??

Answer 23

gives unique physical address so device/node can connect to LAN

Question 24

1 positive to using mesh network
2 negatives to using mesh networks

Answer 24

1. data routed around high traffic parts of the network - many routes
2. expensive
3. faults go unnoticed until there are too many

Question 25

peer to peer 3 advantages

Answer 25

• cheaper than client- server
• everyone is equal
• easier to set up

Question 26

client- server 2 advantages, 2 disadvantage

Answer 26

• computer specialist
• information goes directly to correct client/ person
• better security
• loosing server would loose all the data

Question 27

what form are MACs normally in

Answer 27

hexidecimal