Internet

What is the purpose of DNS?

• It assigns a unique address to every device on the Internet.
• It returns the IP address given the name of a website.
• It forwards a message from one machine to another.
• It has more bits so you can make a longer, unique address.

Why is IP v4 going to be replaced by IP v6?

• IP v6 is easier to use.
• IP v4 does not work on old hardware.
• IP v4 was not encrypted.
• We are running out of IP v4 addresses.

Which of the following is an IP address?

• www.google.com
• 192.168.2.25
• 1024.2048.64.512.256
• A5:D4:23:56:FF:A4

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

• about.example.com
• example.co.uk
• example.com.org
• example.org

A user enters a Web address in a browser, and a request for a file is sent to a Web server. Which of the following best describes how the file is sent to the user?

• The file is broken into packets for transmission. The packets must be reassembled upon receipt.
• The file is broken into packets for transmission. The user’s browser must request each packet in order until all packets are received.
• The server attempts to connect directly to the user’s computer. If the connection is successful, the entire file is sent. If the connection is unsuccessful, an error message is sent to the user.
• The server repeatedly attempts to connect directly to the user’s computer until a connection is made. Once the connection is made, the entire file is sent.

Two computers are built by different manufacturers. One is running a Web server and the other is running a Web browser. Which of the following best describes the ability of the two computers to communicate with each other across the Internet?

• The computers cannot communicate because different manufacturers use different communication protocols.
• 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 can communicate directly because Internet communication uses standard protocols.

Which of the following has the greatest potential for compromising a user’s personal privacy?

• A group of cookies stored by the user’s Web browser
• The Internet Protocol (IP) address of the user’s computer
• The user’s e-mail address
• The user’s public key used for encryption

Which of the following best describes a Distributed Denial of Service (DDoS) attack?

• An attempt by a country to deny its citizens access to the Internet
• An attempt to deny users access to a Web site’s resources by flooding the Web site with requests from multiple systems
• An attempt by one user to deny service to another user by posting material on a social network
• An attempt by a user of the Internet to get private information from a secure database.

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

• A device driver is assigned to the device.
• An Internet Protocol (IP) address is assigned to the device.
• A packet number is assigned to the device.
• A Web site is assigned to the device.

What is the domain of this URL:www.example.com/home.html

• www
• home.html
• www.example.com
• HTML