Unit 2 - AP Computer Science Study Questions

The following figure represents a network of physically linked devices labeled P through S. A line between two devices indicates a connection. Devices can communicate only through the connections shown.

Which of the following statements best explains the ability of the network to provide fault tolerance?

The network is considered fault-tolerant because there are redundant paths between each pair of devices.

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

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

Which of the following best explains how data is typically assembled in packets for transmission over the Internet?

Each packet contains data to be transmitted, along with metadata containing information used for routing the data.

The figure below shows two possible network configurations for devices P through V. A line between two devices indicates a connection. Devices can communicate only through the connections shown.

 

In configuration I, what is the minimum number of connections that must be broken or removed before device T can no longer communicate with device U?

Two

Which of the following best describes the relationship between the World Wide Web and the Internet?

The World Wide Web is a system of linked pages, programs, and files that is accessed via a network called the Internet.

The figure below represents a network of physically linked devices, labeled A through F. A line between two devices indicates a connection. Devices can communicate only through the connections shown.

Which of the following statements are true about the ability for devices A and C to communicate?

1. If devices B and D were to fail, then information sent from device A could not reach device C.

2. If devices D and F were to fail, then information sent from device A could not reach device C.

The figure below represents a network of physically linked devices, labeled A through H. A line between two devices indicates a connection. Devices can communicate only through the connections shown.

What is the minimum number of connections that would need to be removed from the network in order for device A to not be able to communicate with device F?

2

The transmission control protocol (TCP) and Internet protocol (IP) are used in Internet communication. Which of the following best describes the purpose of these protocols?

To establish a common standard for sending messages between devices on the Internet

True or False: the internet is the same thing as the World Wide Web

False

What software program do you use to access the millions of servers, that store content for the World Wide Web? Hint the two programs shown in this frame are this type of software. More widely used examples would be: Google Chrome & Microsoft Edge 

Browser

What do hyperlinks (Text or Images) located on a webpage do?

Take you to another web page on the World Wide Web

What is the most common type of hypertext?

Webpages

What does URL stand for?

Uniform Resource Locator

URL’s provide a webpage?

A unique address (location) identifying where information/documents can be found on the Web

What does HTTP stand for?

Hypertext Transfer Protocol

What is the code for client page errors? 

404 Code

What does HTML stand for?

Hypertext Markup Language

If you do not close the <h1> tag the program will think the entire webpage is a heading. Below choose the HTML tag that will close the <h1> tag?

</h1>

How many tags does the current version of HTML have?

100+ tags

Yahoo stated as a _______ _________ of hyperlinked pages

Webpage Directory

Using three pieces of software this software replaced the human webpage directories 

Search Engines

The college research project known as BackRub became which giant of the search engine software? 

Google 

For your video to be playing right now, your first internet connection goes through what? 

Local Area Network (LAN) 

A WAN is?

Wide Area Network

What does ISP stand for?

Internet Service Provider

What is an example of an Internet Service Provider (ISP)?

Comcast

What does IP stand for?

Internet Protocol

The next level of protocols for the moving of data packets is UDP. Which stands for? 

User Datagram Protocol 

Select the correct matching answer for what each protocol does for the data packet: 

IP = Right Computer

UDP = Right Program 

TCP is a protocol which is used for: 

when all related data packet must “absolutely get there” 

TCP (Transmission Control Protocol) uses what to put vast data packets back together once they reach the destination device? 

Sequence Numbers

Domain Name System (DNS) is?

Maps Domain Names (ex Google.com) to the corresponding numerical addresses

What is an example of a Domain Name?

edpuzzle.com

Which layers did the video discuss today?

1. Transport Layer

2. Session Layer

3. Network Layer