comp sci quiz 2

IP addresses is a sequence of four numbers between...?

0 and 255

According to the Blown to Bits Chapter The Internet as System and Spirit, The Internet is: Email and web pages; digital photographs; A system, a delivery service for bits, whatever the bits represent and however they get from one place to another; A bunch of wires and cables.

A system, a delivery service for bits, whatever the bits represent and however they get from one place to another

A packet-switched network: (Select all that are correct) Allows unlimited size messages. Provides uninterruptible connections—at a high cost per connection. Is a packet of about 1500 bytes or less. A packet roughly the amount of text you might be able to put on a postcard.

Allows unlimited size messages, Is a packet of about 1500 bytes or less, and a packet roughly the amount of text you might be able to put on a postcard.

what is an ISP

Any computer that provides access to the Internet. Internet Service Provider. Usually home telephone or cable company. Universities and big companies are their own ISP.

Part of the Internet infrastructure include Domain Name Servers, which are computers loaded with information about which IP addresses, that: Convert IP addresses into domain names. Convert domain names into IP numbers. Transfers packets of information. Checks for errors in packets of information.

Convert IP addresses into domain names

Which of the following best explains how data is transmitted on the Internet?Data is broken into packets, which are all sent to the recipient in a specified order along the same path. Data is broken into packets, which can be sent along different paths. All data is transmitted in a single packet through a direct connection between the sender and the recipient. Multiple data files are bundled together in a packet and transmitted together.

Data is broken into packets, which can be sent along different paths

Which of the following best describes the role of the Internet Engineering Task Force (IETF)?Developing standards and protocols for Internet communication. Preventing copyrighted materials from being illegally distributed online. Preventing malicious software from being distributed online. Verifying the ownership of encrypted keys used in secured messages.

Developing standards and protocols for Internet communication

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. Each packet contains an encrypted version of the data to be transmitted, along with metadata containing the key needed to decrypt the data. Each packet contains only the metadata used to establish a direct connection so that the data can be transmitted. Each packet contains multiple data files bundled together, along with metadata describing how to categorize each data file.

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

Which of the answers below is a major part of the Internet? First and Last Mile: Texts, notifications, apps; everything we do to connect and receive information from the Internet; routers, WiFi, cell service. Internet Hubs: Wires come to a building where they all connect and send information. Internet Backbone: Cable highway - cables come from building down to dock; cable on the ocean floor.

First and Last Mile: Texts, notifications, apps; everything we do to connect and receive information from the Internet; routers, WiFi, cell service. Internet Hubs: Wires come to a building where they all connect and send information. Internet Backbone: Cable highway - cables come from building down to dock; cable on the ocean floor.

At heart, all the core of the Internet does is to transmit packets: From your computer > router > ISP > destination IP address. From router > ISP > your computer > destination IP address. From ISP > your computer > router > destination IP address. From destination IP address > your computer > router >ISP

From your computer > router > ISP > destination IP address

what is TCP

Higher level protocol. Transmission Control Protocol. Deliver messages reliably even though the delivery of individual packets within the network may be unreliable.

Which of the following statements about the Internet is true? The Internet is a computer network that uses proprietary communication protocols. The Internet is designed to scale to support an increasing number of users. The Internet requires all communications to use encryption protocols. The Internet uses a centralized system to determine how packets are routed.

The Internet is designed to scale to support an increasing number of users.

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 ensure that communications between devices on the Internet are above a minimum transmission speed. To ensure that private data is inaccessible to unauthorized devices on the Internet. To establish a common standard for sending messages between devices on the Internet. To validate the ownership of encryption keys used in Internet communication.

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

what is bot net

a group of bots used in a DDoS attack to overwhelm a site.

what is cloud computing

a network of remote servers (powerful computers) located around the world, usually in large, safe buildings called Data Centers.

According to the domain name system (DNS), which of the following is a subdomain of the domain example.com?About.example.com; example.co.uk; example.com.org; example.org

about.example.com

what is a ip address

an Internet Protocol address is a unique numerical label assigned to each device connected to a computer network.

what is a node

any addressable device on a network.

How does information NOT travel long distances? Cable highway. Wires on the floor of the ocean - sometimes buried in the ocean floor but most of the time just laying on the bottom of the ocean. By satellites. By mirrors.

by mirrors

what are packets

envelopes of information that contain chunks of data or metadata used for routing the packet between the origin and the destination on the Internet as well as for data reassembly.

t/f Circuit-switched networks were created to connect to the Internet.

false

t/f Emails can get lost, but when it happens, it is almost always because of a network failure, not because of a problem with an ISP or a personal computer

false

t/f The Internet core is made up of the machines that interface directly with the end users—for example, your computer and mine.

false

t/f The edge of the Internet is all the connectivity that makes the Internet a network

false

what is latency

how long it takes data to travel between its source and its destination.

What would be required for 5G?

more towers

what is a domain name

part of a hostname that identifies a specific organization or group; acts like a phonebook for the Internet.

what is DDoS

stands for distributed denial of service; cyber attack on a specific server or network that attempts to disrupt normal operations or traffic for that server. The attack floods the server or network with a constant flood of traffic that makes it impossible for the server to withstand the influx of messages.

what is redundancy

the inclusion of extra components that can be used to mitigate failure of a system if other components fail.

t/f A "protocol" is a standard for communicating messages between networked computers.

true

t/f According to How the Internet Works Video, everything in the computer and everything you send over the Internet is binary and like a kind of Morse code your computer understands

true

t/f IPv6 (IP version 6) is 128 bits or 2 to the power of 128 or 2128 addresses

true

t/f Ship anchors, fishing, (human activity) can damage the wires on the ocean floor

true

t/f There are 256 × 256 × 256 × 256 possible IP addresses, or about 4 billion. (IP Version 4)

true

what is a hostname

unique identification for a specific computer on the Internet.