DNS, Switching, HW

Presentation

•

Computers

•

10th - 11th Grade

•

Medium

Martin Hopkinson

Used 2+ times

FREE Resource

9 Slides • 21 Questions

DNS, Switching, Topologies

Revision!

DNS

Domain Name Service
Translates web addresses into IP Addresses

Multiple Choice

What does DNS stand for?

Direct Naming Service

Domain Name Situation

Direct Naming Service

Domain Name System

Multiple Choice

DNS maps human, readable domain names into actual ___.

IP addresses.

domain names.

servers.

caches.

Multiple Choice

When searching for a DNS, your computer will automatically check it's memory, which is also called

cache

top level domain

IP address

root

Multiple Select

Which of these is stored in the header of a packet?

Senders IP Address

Recipient IP Address

Username

Packet Number

Time Sent

Cloud Storage

Stores data/software on a remote server (offsite)
Dropbox, Amazon Cloud, OneDrive...
Data is stored on SSDs (most likely)
Data is backed up automagically
Data often stored in various locations

Advantages

Allows access to files from anywhere with an internet connection
Share data with people in different locations
Data is backed up automatically (SLA)
Providers are legally bound to safeguard the data
Access is on demand (SaS)

Disadvantages

You are entirely dependant on having an internet connection
Some users are concerned about security
Big companies may be targets for hackers

Multiple Choice

Which of the following are advantages of cloud storage?

It requires an internet connection, services can be free, can access from any internet connected device.

Cloud providers control your data, services can be free, can share, edit and save files online.

Can access with any internet enabled device, can share, edit and save files online, provider handles security.

Multiple Choice

Which of the following best describes cloud storage?

Cloud storage is free and means you store data online.

Cloud storage can be free or paid for and means you store data online

Cloud storage can be free or a paid for service where you copy data to an online account.

Multiple Select

Which of the following statements are true?

Local Area Networks cover a small geographical area whereas a Wide Area Network covers a large geographical

Local Area Networks cover a single site such as a school whereas a Wide Area Network can cover several sites

Local Area Networks are made from a single network whereas a Wide Area Network is made up of several LANs

Multiple Choice

Which of the following HARDWARE does a computer need to connect to a network or other computer devices?

ethernet card

NIC card

IP Address

WiFi

Multiple Choice

A stand alone computer cannot connect to the Internet or any other computer.

true

false

Multiple Choice

A network is created when one device is connected .

True

False

Star Topology

Has a central switch or hub to direct the packets of data
Each node has its own cable/link to the switch/hub
+ If one cable fails the rest of the network is fine
+ Consistant performance under heavy load
- Central point of failure
Relatively expensive (Cables + switch)

Full Mesh Networks

Each node is connected to every other node
Very expensive and complex to set up and maintain
Needs specialist equipment and staff
Very stable, difficult to disrupt
No central point of failure

Partial Mesh

Not all nodes are connected
still relatively stable, but less expensive
+

Multiple Choice

Which of the following is a disadvantage of a mesh network topology?

If the central switch or server fails, the whole network is down

Requires a high performance switch or server in the centre as all traffic passes through it.

Very expensive due to the amount of cabling required.

It can handle very high data traffic rates

Multiple Choice

A mesh network is very robust. If one path fails, the rest can still be used - True or False?

True

False

Multiple Choice

An advantage of a mesh network topology is that there is no central node to fail - True or False?

True

False

Multiple Choice

Which of the following is a disadvantage of a star network topology?

If the central switch or server fails, the whole network is down

Requires a high performance switch or server in the centre as all traffic passes through it.

Extra hardware such as hubs and switches may be needed

All 3 of them

Multiple Choice

Which of the following is NOT an advantage of a star network topology?

There is no central node to fail

Simple to add or remove a node as it has no effect on any other node

Good security - no workstation can interact with another without going through the server first

Very few data collisions as each node has its own cable to the server

Multiple Choice

Which of the following is NOT an advantage of a star network topology?

There is no central node to fail

Simple to add or remove a node as it has no effect on any other node

Good security - no workstation can interact with another without going through the server first

Very few data collisions as each node has its own cable to the server

Multiple Choice

A .........network is a network topology with each node being interconnected.

Star

Mesh

Multiple Choice

Which network topology has a central node connected to all other nodes. The central node might be a hub, switch or server.

Star

Mesh

Multiple Choice

Which network topology is this?

Bus

Ring

Mesh

Star

Multiple Choice

Which network topology is this?

Star

Mesh

Ring

Bus

Multiple Choice

This is a technical term that describes the layout of connections in a network.

Network Topology

Standalone Computer

Network Node

Workstation

Wireless Mesh/Partial Mesh

A more modern version of the topology
Cheaper - as no need for expensive cables
The more nodes that are installed, the FASTER the network
New nodes are automatically incorporated into the network
Networks 'self-heal' if errors are detecected

DNS, Switching, Topologies

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