Networks
47 important questions on Networks
What is a logical topology?
What is a Physical topology?
What is a Virtual Network?
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What is a VPN?
State an advantage of VPN
What is a TCP/IP model?
What are the 4 layers of the TCP/IP model?
- Transport layer
- Internet layer
- Network access layer
What does the Internet layer do?
What is circuit switching?
•Originally data was sent across the internet using the Plain Old Telephone System (POTS).
•This used analogue signals, and these were sent down copper wire.
•Once the circuits were set up, all data packets were sent along the same path.
• At the end of the connection, the circuit was torn down so the circuit could be used again.
What is Packet Switching?
•Packet switching involves the use of routers.
•They make decisions about which way to send a packet to its destination.
•Packets can go down different paths, and are re-assembles at their destination. This means that congested or broken links can be avoided and all paths can be used, allowing maximum efficiency.
What are the four different type of topologies?
Why were 2.4GHz waves good?
What is a problem with 2.4GHz waves?
What is the top speed of 2.4GHz?
What is an alternative to 2.4.GHz?
Which 3 channels would you choose for the least amount of interference in 2.4GHz?
What are the 3 different protocols that help to secure wireless networks?
- WPA (Wi-Fi Protected Access)
- WPA2 (Wi-Fi Protected Access 2)
Which protocol is still in use to secure wireless networks?
Why is WEP no longer in use?
What is WPA/WPA2 used for?
NOTE: WPA2 is an improved version of WPA
What is a network switch?
What is a Hub?
What is a WAP/ what does it do?
What is a Modem?
What is a NIC?
What is an Ethernet Cable?
Why are Ethernet cables so good?
What is a Bridge?
Give 2 reasons why people use a network.
- To share files/data
- To share hardware
- To upgrade software packages to multiple machines
- Log on from any machine
- SECURITY
What is 'the cloud'/cloud computing?
What does DNS stand for and what does it do?
What does FTP stand for and what does it do?
What does HTTP/HTTPS stand for and what does it do?
What does SMTP stand for and what does it do?
What is a Bus topology?
Name an advantage of a Bus topology
Name a disadvantage of a Bus topology
What is a Star network
Name an advantage of a Star Network
- A cable can break but the rest still works.
- It gives optimum performance without collisions
Name a disadvantage of a Star Network
- Hubs or switches are needed and increase costs which add to the cost.
- If the hub or switch fails, the whole system goes down.
What is a ring network?
Name an advantage of a Ring Network
Name a disadvantage of a Ring Network
What is a Mesh Network?
Name an advantage of a Mesh Network.
- Even if one of the components fails there is always an alternative present, so data transfer does not get affected.
- Expansion and modification can be done without disrupting other nodes.
Name a disadvantage of a Mesh Network
- Overall cost of this network is ridiculously high
- Set up and maintenance of this topology is difficult. Even administration of the network is hard.
What was the original wireless band used for communication?
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