21 Questions
What is the technical term for using fake emails or sites to trick people into giving personal data?
Phishing
Which protocol 'pulls' emails from a server when requested?
POP3
What is the end part of a web address that points to a specific webpage called?
Path (URL)
Which term refers to how suspicious files are stored by anti-virus software to prevent them from infecting the computer?
Quarantine
In email validation, what does a 'range check' typically verify?
If input data falls within a predetermined set of values
What is the term for the special field in a database that acts as a unique identifier?
Primary Key
What is a disadvantage of using email clients for accessing emails?
Emails can be lost if the computer crashes
In packet switching, what is the purpose of the header in each packet?
To check that packets are reassembled correctly
What is a benefit of using VoIP and packet switching for transmitting audio and video data?
Efficient traffic flow due to packets choosing different routes
What is a limitation of serial data transmission over long distances?
Complexity in breaking data into bits
Which transmission mode allows signals to go in both directions but not simultaneously?
Half-duplex
What is the purpose of using an email attachment?
To send files or documents along with an email message
What is the term used to describe unwanted email messages, often containing harmful links or attachments?
Spam
Which feature of emails allows you to send a copy of the email to another person?
Use CC
What do 'web spiders' or 'web crawlers' do in reference to search engines?
Collect details of websites
How does email delivery speed compare to traditional post delivery?
Emails usually arrive in seconds
Which protocol is responsible for handling the sending of emails on the internet?
SMTP
What can attachments in emails potentially contain that could harm your computer?
'Viruses'
In email terminology, what is CC used for?
Sending a copy to other people
What type of email message has become a significant problem due to its unwanted and mass distribution?
'Spam'
Which term describes the storage of email contacts and the ability to send emails simultaneously to multiple people?
'Address Book'
Study Notes
- Search engines use web crawlers to collect details of web pages and store them in a database called the Index.
- Search results are displayed in order of popularity, with sponsored links placed at the top based on how much a company pays.
- Users can enhance their search queries using operators like quotes for exact words, minus sign to exclude words, and OR for multiple keywords.
- Emails are stored on servers and forwarded to recipients, allowing for asynchronous communication between senders and receivers.
- Advantages of email include high/low priority settings, address book features, while disadvantages include junk email (spam) and potential security risks like phishing.
- Email protocols like SMTP, POP3, and IMAP allow for sending and receiving emails on different devices and software.
- Packet switching is the process of breaking internet data into packets for efficient transmission, with packet headers containing vital information for reassembly.
- Transmission modes include simplex (one-way), duplex (two-way), and half-duplex (take turns) for devices on a network to communicate.
- VoIP utilizes packet switching to encode and decode audio/video data in packets for efficient transmission over the internet.
- Wired transmission methods include serial (one bit at a time) and parallel (multiple bits at once) transmission for data transfer over different distances.
Test your knowledge on how search engines index web pages and use web spiders to collect details. Learn about sponsored links, popularity ranking, and the role of bots in finding new or updated pages on the internet.
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