1.3) Networks and Topologies Flashcards
Define what it means by a ‘layer’
a division of network functionality
Describe one advantage of of using layers to construct network protocols.
- it is self-contained
- it allows different developers to concentrate on one aspect of the network
- A layer can be taken out and edited without affecting others layers
- it promotes interoperability between vendors and systems
Which network topology best describes The Internet?
Partial mesh network
Which factor affecting the performance of a network is described as: ‘data arrives corrupted, resulting in it being resent. The signal quality of wireless is dependent on the range of the device.’
Error rate
The difference between a star network and a mesh network is that…
There is more than one route for data to take on a mesh network
A major disadvantage of a mesh network is?
A lot of cabling and redundant switches are needed which can be expensive
What does the protocol ‘IP’ stand for?
internet protocol
What is meant by ‘the cloud’?
Remote servers that store data and software that can be accessed over the internet
What is the correct name for a piece of network hardware which sends data between networks?
router
What is the purpose of the SMTP protocol?
to send email to an email server
What is the major limitation with Bluetooth technology?
short range
A network set up across a school site is an example of a…
local area network
Which of the following is an advantage of storing data in ‘the cloud’?
automatic backups can be taken
Which protocol is responsible for routing data across networks?
IP
What is the purpose of a Domain Name Server?
map a domain name in a URL to an IP address
Peter wants to increase the reliability of the connection between a remote building and the server room. What could he do?
use fibre optic cable
What is the purpose of the POP protocol?
to retrieve email from and email server
What does the protocol ‘TCP’ stand for?
transmission control protocol
Which statement best describes ‘Ethernet’?
Data transmitted in frames on a local area network
A school has built a new computer room and needs to connect each computer to a switch. Speed and reliability are important but cost is an issue, what would you recommend?
copper cable
What does DNS stand for?
Domain name server/system
The TCP/IP protocol is an example of what in computing?
standard
With Wi-Fi devices, they must each be set to send and receive data on the same…
frequency
Which network topology provides the most resilience to faults?
full mesh network
Which factor affecting the performance of a network is described as, ‘the delay from transmitting data to receiving it.’
latency
