AP Computer Science Principles

An IPv4 address has 32 bits, so there are 2³² (over 4 billion) possible IPv4 addresses. Since the Internet is gaining devices quickly, we will soon surpass 2³² unique devices on the Internet.

In anticipation of all the new Internet devices, we are in the process of switching to IPv6, which uses 128 bits for a single address. That’s 96 extra bits to represent one address.

Which of the following statements correctly describes how many more addresses will be possible to represent by switching from IPv4 to IPv6?

• 96 more addresses can be represented with IPv6

• 2⁹⁶ more addresses can be represented with IPv6

• 96 times as many addresses can be represented with IPv6

• 2⁹⁶ times as many addresses can be represented with IPv6.

Which of the following would pose the greatest threat to a user’s personal privacy if it were to be leaked to the public?

• The IP address of the user’s computer

• The user’s browser cookies

• The user’s email address

• The user’s public key used for encryption

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

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

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

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

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

The Internet Engineering Task Force (IETF) defines the protocols and standards for how the Internet works. The members of the IETF are:

• An international coalition of government agencies who oversees the Internet in their countries.

• The worldwide leaders of the Tier 1 Internet service providers.

• A loosely organized collection of citizens and engineers who communicate mostly by email.

• political leaders and heads of state.

• There are no members, IETF is an “organization” in name only.

What is RFC?

• Restricted Fiduciary Contract

• Request for Comments

• Radio frequency controller

• Related Fundamental Content

• ReFactored Code

Which of the following is true about Domain Name System (DNS) servers?

• There is only one DNS server; if it goes down, Internet traffic stops.

• IP addresses are linked to domain names by DNS

• They use only IPv4 format.

• Cryptography attacks sometimes takes advantage of DNS to flood the target site.

What is the World Wide Web?

• A collection of wires and cables to connect devices

• Another name for the Internet

• A way to search for and share documents and resources

• A browsers

Which of the following is false about HTTPS?

• HTTPS uses Certificate Authorities (CAs) to verify a site’s identity

• HTTPS encrypts data before it is separated into packets

• HTTPS ensures the secure sharing of data

• HTTPS trades faster performance for more security

What is the name for a setup where processions is done at the sending and receiving locations?

• LAN

• Point-to-point environment

• End-to-end architecture

• Redundant organization

If the post office delivered mail exactly like routers deliver messages on the internet, which 2 of the following statements would be true?

• One mail carrier would be responsible for delivering a letter from sender to receiver.

• The mail carrier would sometimes take a different path to deliver each letter to your home.

• Letters would be written on the outside of envelopes for all to read instead of letters put inside envelopes.

• your mail could not be delivered if a road your mail carrier was planning to take were under construction