– Purposes & Uses 20 – Purposes & Uses 20

– Purposes & Uses 20 is part of everyday life But could you explain how messages travel across the Internet? We’ll start by looking at the basics of plus advantages & disadvantages Then we’ll move into to more technical aspects, such as protocols For a start, we’ll focus a bit of history…

– Purposes & Uses The Internet Born: 1969 The Web Born: 1989 www Born:

– Purposes & Uses 20 This is the Queen sending an in 1975! Note the word on the wall – it says ‘ARPANET’

– Purposes & Uses 20 So has been around since 1971 That’s way before the Web! Sending s seems immediate But it actually happens in stages… When one person sends a message, it is stored on servers When the receiver logs-on, message are forwarded (or downloaded) to them So s use the store & forward system…

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– Purposes & Uses 20 B Server A Store & Forward Messages are stored on the server & then ‘forwarded’ when the receiver clicks to download

– Purposes & Uses 20 Server Don’t both need to be online at same time So can use at time that suits you! Different to Instant Messaging or VoIP

– Purposes & Uses 20 s are sent from an sender’s outbox and received in a recipient’s Inbox The sender & recipient do not have to be online at the same time That’s great when sending s to people in different global time zones This applies to staff in a big company, as well as families & friends

– Purposes & Uses 20 Send Attach Address Book High/Low Priority CC – Send a copy to another person

– Purposes & Uses 20 Advantages Attachments You can attach multiple files, such as images or documents

– Purposes & Uses 20 Advantages Copy Use ‘cc’ and ‘bcc’ to send a ‘copy’ of a message to multiple other people.

– Purposes & Uses 20 Advantages Contacts ‘Address books’ store contacts & you can also use distribution lists to lots of people simultaneously

– Purposes & Uses 20 Advantages Delivery Speed s usually arrive in seconds – much faster than traditional post

– Purposes & Uses 20 Advantages Webmail Gmail & Hotmail use cloud servers so can access anywhere

– Purposes & Uses 20 Disadvantages Junk - Spam Spam or ‘junk’ has become a massive problem fo people

– Purposes & Uses 20 Disadvantages Viruses from attachments Attachments can contain code designed to harm your computer

– Purposes & Uses 20 Disadvantages Phishing s from fake banks & businesses sent as a scam

– Purposes & Uses 20 Disadvantages Delayed Reply isn’t real time so you can’t expect an instant response

– Purposes & Uses 20 Disadvantages No Access Not everyone has – or they might not logon regularly

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