APCSP Unit 2 Final Exam Review

Researchers have developed a simulation of packets traveling between server computers and client computers in a network. Of the following, which two outcomes are most likely to be results of the simulation? Select two answers.

Better understanding of the effect of temporarily unavailable network connections AND Better understanding of the impact of increased connection speeds for frequently visited servers

To connect to a website's server, this translates the URL into an IP address at the request of the user.

DNS

When a device connects to a website, it is really just requesting and receiving files using this type of request.

Hypertext Transfer Protocol (HTTP)

The figure below represents a network of physically linked computers labeled A through G. A line between two computers indicates that the computers can communicate directly with each other. Any information sent between two computers that are not directly connected must go through at least one other computer. For example, information can be sent directly between computers A and B, but information sent between computers A and C must go through other computers. Which of the following statements about security in the network is true? I. Computers A and D need to communicate with at least two additional computers in the network in order to communicate with each other. II. Computers B and C can communicate with each other without additional computers being aware of the communication.

II

This diagram shows a number of computing devices connected to the Internet with each line representing a direct connection. Device A is attempting to send data over the Internet to Device E. Which of the following is true of how the data will travel through the network?

It is possible that the data travels through any of the devices in the network before arriving at device E

Emilee is watching an online video. The video is being sent to her laptop by a server over the Internet which splits the video into packets and sends them in the order they appear in the video. Which of the following is true about how the packets will arrive at her computer?

NOT - Packets that arrive out of order will be sent back to the server. Correct ANSWER : the packets may arrive out of order

Which of the following is true of how packets are sent through the Internet?

Packet metadata is used to route and reassemble information travelling through the Internet

An Internet Service Provider (ISP) is a company that builds the routers and wired connections that allow individuals to access the Internet.An ISP is considering adding additional redundant connections to its network. Which of the following best describes why the company would choose to do so?

Redundant networks are more reliable

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 are reassembled upon receipt.

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

This allows data to be sent over the Internet so that it can be reassembled properly when it arrives, and missing data packets can be re-requested.

Transmission Control Protocol (TCP)

When data needs to be send very quickly from sender to receiver, this is used even though there may be packet loss or packets may be reassembled out of order.

UDP

You are using zoom to video chat with an admissions counselor at one of the universities you plan to apply to, but the video or audio sometimes lag. What could be contributing to this?

UDP

One of the differences between a computing network and a computing system is:

network devices are interconnected and can send and receive data, but a system has a shared purpose

What is the relationship between fault tolerance and redundancy?

redundancy increases fault tolerance