Understanding Networks and the Internet

What does the Domain Name Server (DNS) do?

• The DNS manages email delivery for domains.

• The DNS provides security certificates for websites.

• The DNS translates domain names into IP addresses.

• The DNS stores website content on servers.

What is a protocol in data communication?

• A protocol is a method for encrypting data.

• A protocol is a set of rules for data communication.

• A protocol is a software application for data storage.

• A protocol is a type of hardware used in networking.

Why is a protocol necessary for data communication?

• Protocols are only needed for wireless communication.

• Protocols slow down data transfer rates.

• Protocols are optional and can be ignored in most cases.

• Protocols are essential for ensuring reliable and standardized data communication between devices.

How does packet switching work?

• Packet switching transmits data in small packets that are routed independently to the destination, where they are reassembled.

• Packet switching sends data in a single continuous stream to the destination.

• Packet switching requires a dedicated circuit for each communication session.

• Packet switching uses fixed-size frames that cannot be adjusted during transmission.

What is the difference between the Internet and the World Wide Web?

• The Internet is a type of software; the World Wide Web is hardware.

• The World Wide Web is a network of servers; the Internet is a single website.

• The Internet and the World Wide Web are the same thing.

• The Internet is the infrastructure; the World Wide Web is a service that runs on it.

How are web addresses constructed?

• Web addresses are created with a username, password, and email.

• Web addresses are constructed using a scheme, host, optional port, path, optional query, and optional fragment.

• Web addresses are constructed using only a domain name and a path.

• Web addresses consist of a title, description, and keywords.

What are the different types of cables used for data transmission?

• Ethernet cables

• Twisted pair cables, coaxial cables, fiber optic cables, USB cables

• Power cables

• HDMI cables

Which type of cable has the highest data transmission speed?

• Coaxial cable

• Twisted pair cable

• HDMI cable

• Fiber optic cable

How do you calculate the time taken to download a file?

• time (seconds) = download speed (bits per second) / file size (bits)

• time (minutes) = file size (megabytes) / download speed (megabits per second)

• time (seconds) = file size (bytes) / download speed (kilobytes per second)

• time (seconds) = file size (bits) / download speed (bits per second)

What is buffering and why is it used?

• Buffering is used to increase the processing speed of a computer by eliminating data storage.

• Buffering is a method for permanently deleting data to free up space.

• Buffering is a technique for compressing data to reduce file sizes.

• Buffering is a technique for temporarily storing data to manage differences in processing speeds and ensure smooth data flow.