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This series of videos and PPT are a great summary of all the topics in this unit:
This series of videos and PPT are a great summary of all the topics in this unit:
topic_3_networks_pdf.pdfDifferent types of networks
Different types of networks
3.1.1 (1).pdfGCSEPod_Computing_24_004_Common_Topologies.mp4GCSEPod_Computing_41_001_LAN_and_WAN.mp4GCSEPod_Computing_41_006_Virtual_Networks.mp4Technologies required to provide a VPN and uses of VPN
Technologies required to provide a VPN and uses of VPN
3.1.4.pdfIt uses the internet to allow people to log into a network remotely and access its resources, but encrypts the connection to thwart eavesdroppers.
If your company sets you up with a VPN, you can access your corporate intranet, file servers or email from home or a coffee shop – just as if you were using it in your office.
This makes VPN a popular way to support remote workers, especially in fields where privacy is paramount, such as health care.
Benefits of telecommuting:
Benefits of telecommuting:
3.1.5.pdfNecessity of protocols
Necessity of protocols
3.1.7.pdfDefinitions:
Protocol - International rules that ensure the transfer of data between systems. A protocol that is registered as a standard for a specific type of transfer is called a standard protocol. For example: TCP/IP is a standard protocol
Data packet - Portion of a message that is transmitted through a network. Contains data such as check digits and destination address
3.1.8 - Speed of data transmission
3.1.8 - Speed of data transmission
3.1.8.pdf3.1.9 - Compression
3.1.9 - Compression
3.1.9.pdf3.1.10 - Characteristics of different transmission media
3.1.10 - Characteristics of different transmission media
3.1.10.pdf3.1.11 - Packet switching
3.1.11 - Packet switching
3.1.11.pdf3.1.12 - Advantages and disadvantages of wireless networking
3.1.12 - Advantages and disadvantages of wireless networking
First take a look at this slightly cheesy but fairly good video about wireless networking:
Next take a look at this PPT to get some more information about the advantages and disadvantages:
3.1.12 (1).pdfSo what are some of the advantages and disadvantages. Remember, you should be able to discuss this topic in relation to :
Changes in work patterns
Social activities
Health issues, concerns
And be able to discuss when wireless networking would be most appropriate or not.
Some positives are:
Freedom of movement
Less infrastructure (no expensive cable runs)
(Usually) easier to setup
More devices per uplink
Some negatives:
Slower (shared bandwidth)
Range
Susceptible to interference and jamming
Vulnerable to eavesdropping
An increasing number of devices are wireless only
3.1.13 - Hardware and software components of a wireless network
3.1.13 - Hardware and software components of a wireless network
3.1.14 - Characteristics of wireless networks
3.1.14 - Characteristics of wireless networks
3.1.15: Different methods of network security
3.1.15: Different methods of network security
Start by watching the video below and then work through the PPT for some additional detail.
3.1.15 (1).pdfDefine and explain each of the security methods listed below:
Symmetric key encryption
Public key encryption
Trusted MAC addresses
Then answer these additional questions:
What other methods of network security are available?
How is your home network secured? What additional steps could you take to secure it?
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