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Learn: Digital Communications
Cambridge Nationals IT Level 1/Level 2
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Welcome!You've already studied design tools, human-computer interfaces, data testing, and cyber-security. Now, let's build on that foundation and learn about digital communications—how devices exchange information effectively.
What are Digital Communications?Digital communications involve the transfer of information between devices using digital signals. This is essential for modern technology, enabling things like emails, video calls, and online gaming.
Communication MethodsWired communication uses physical cables like Ethernet to connect devices. Wireless communication uses signals like Wi-Fi or Bluetooth to transmit data without cables. Both have pros and cons depending on speed, range, and reliability.
Which of the following is an example of wired communication?
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ProtocolsProtocols are rules that devices follow to communicate. For example, the HTTP protocol allows web browsers and servers to exchange information, while SMTP is used for sending emails.
Match the items on the left with their correct pairs on the right
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Speed and BandwidthBandwidth is the maximum amount of data that can be sent over a connection in a given time. Higher bandwidth allows faster communication. For example, fibre-optic connections usually have higher bandwidth than copper cables.
The term {{blank0}} refers to the maximum amount of data that can be transmitted in a given time frame.
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Encryption in CommunicationEncryption protects data during communication by converting it into a code that can only be read by authorised parties. For example, HTTPS encrypts web traffic to keep it secure.
Which statements about encryption are true? (Select all that apply)
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Review Time!Great work! We've explored digital communication methods, protocols, bandwidth, and encryption. Let's test your understanding of these concepts.
What does the SMTP protocol enable?
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Match the items on the left with their correct pairs on the right
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The protocol {{blank0}} is used for transferring files, while {{blank1}} secures web traffic.
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Which of the following are examples of digital communication methods? (Select all that apply)
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Well Done!You’ve successfully completed the lesson on Digital Communications. Keep exploring how technology connects the world!
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