CodeHS: The Internet

Which of the following best describes the basic purpose of the internet?

• The internet protects the privacy of sensitive information.

• The internet stores data

• The internet sends information from one computer to another.

• The internet connects input and output devices to a computer.

What is the main purpose of routers?

• Routers connect computers and choose the path that information takes from one computer to another.

• Routers connect computers to nearby wireless devices, such as headphones and speakers.

• Routers translate a website’s name into an IP address.

• Routers increase the speed of a network’s internet connection by decreasing the latency.

Two computers are built by different manufacturers. Which of the following best describes whether these two computers can communicate with each other across the Internet?

• The computers can communicate directly because Internet communication uses standard protocols that are used by all computers on the Internet.

• The computers can communicate, but additional hardware is needed to convert data packets from one computer’s protocol to the other computer’s protocol.

• The computers can communicate directly only if the messages consist of text. Other formats cannot be interpreted across computers.

• The computers cannot communicate, because different manufacturers use different communication protocols.

Which of the following is a benefit of the fault-tolerant nature of Internet routing?

• The ability to use multiple protocols such as hypertext transfer protocol (HTTP), Internet protocol (IP), and simple mail transfer protocol (SMTP) to transfer data.

• The ability to resolve errors in domain name system (DNS) lookups

• The ability to provide data transmission even when some connections between routers have failed

• The ability to use a hierarchical naming system to avoid naming conflicts

According to the domain name system (DNS), which of the following is a valid subdomain of the domain example.com?

• about.example.com

• example.com/about.html

• example.com.about

• example.org

What is the main purpose of the DNS system?

• DNS increases the bandwidth of a network.

• DNS ensures that websites are secure.

• DNS translates the names of websites into IP addresses.

• DNS increases connectivity by making the internet fault-tolerant.

Which of the following is NOT a main method for sending information from one computer to another?

• Radio

• molecules

• light

• electricity

Which of the following best explains what happens when a new device is connected to the Internet?

• A packet number is assigned to the device.

• A Web site is assigned to the device.

• A device driver is assigned to the device.

• An Internet Protocol (IP) address is assigned to the device.

What information is contained in a packet?

• The entirety of a digital message, and metadata about the message, including where it came from and where it is going.

• A small part of a digital message, and metadata about the message, including where it came from and where it is going

What does it mean for a routing system to be 'redundant'?

• it means that there is more than one path between two points in the network.

• it means if one router goes down then the internet would crash.

• it means multiple packets are sent over the network.

• it means each computer is assigned its own address