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WIRELESS NETWORKS,
BROADBAND AND DIAL UP.
Lesson Objectives
By the end of the lesson you will understand:
•Advantages and disadvantages of wireless networks
•The differences between Dial-up and Broadband
WIRELESS NETWORKS
Advantages of wireless networks: •allows inexpensive LANs to be set up without cables
•allows people the freedom of working anywhere a signal can be received
•ideal for networks in old listed buildings where cables would not be allowed to be installed
•global set of standards – you can use Wi-Fi all over the world
•can use a variety of devices such as tablets, mobile phones, etc
•health and safety – tidier desktop with no trailing cables.
Disadvantages of Wi-Fi:
•power consumption is high – which means laptops soon exhaust their rechargeable batteries
•there may be health problems in using Wi-Fi
•there may be security problems even when encryption is used
•Wi-Fi networks have a very limited range (e.g. 150 ft)
•can get interference if wireless network signals start to overlap
•transmission speed slower than cable.
BROADBAND AND DIAL UP
Advantage Disadvantage
Broadband does not tie up your phone line.
Broadband’s fast download time means that you can use it to listen or watch films or music.
Search engines work faster with broadband so takes less time to find information.
Broadband always on so it much quicker and safer to keep anti-virus, etc up to date. /Don’t have to waste time connecting to the internet.
Broadband can make cheap phone calls via the internet .
Broadband makes video conferencing possible.
Broadband allows more devices/computers to be connected to the internet at the same time.
Broadband not available everywhere.
Monthly fees so might not be useful to a light user.
Advantages Disadvantages
Dialup can be used on a phone line. Using a dialup modem is very slow and limits its use / a download on dialup can take hours compared to download on broadband.
If only a light user dialup might be cheaper as only have to pay when you are using it, broadband you pay a monthly subscription whether you use it or not.
EXAM QUESTIONS
Exam questions
•An organisation is considering using a wireless network. Describe two advantages and two disadvantages for the organisation of using a wireless network over a cable network. [4]
•Discuss the advantages and disadvantages of dialup and broadband connections when using the Internet. [4]
Task
•Go to www.ybgict.weebly.com
•Go to A2 Resources -> Networks
•Open 4 – wireless networks, broadband and dial up
1. Copy 3 advantages and disadvantages of wireless networks
2. Copy 3 advantages and disadvantages of both broadband and dial up
3. Copy and complete Exam questions
Lesson Objectives
By the end of the lesson you will understand:
•Advantages and disadvantages of wireless networks
•The differences between Dial-up and Broadband
