Participation Quizzes Ch 3

Registering www.AAmazon.com and then trying to sell the domain name to Amazon for a large profit is known as _____.

Cybersquatting- Numerous countries have passed laws to prevent cybersquatting.

(T/F) 96.16.200.110 is a domain name.

False- 96.16.200.110 is an IP address. A domain name is an easy-to-remember name for an IP address, in this case whitehouse.gov.

(T/F) A search engine searches hundreds of web pages, returning the best matches.

False- A good search will have to search many more web pages (millions/billions) to be considered of any use.

(T/F) Purchasing an 802.11ac wave2 (latest wifi version) PC and router guarantees wireless speeds of 1730 Mbps.

False- A number of factors may impact network speed. Ex: An ISP connection may limit the maximum speed.

The language used for a text file that describes a web page.

Hyper-text markup language- HTML has links (hyper-text) to other files on the web.

Radio Waves

Mechanism used by a cell tower and cellular device to communicate. A cell tower provides the interface between wireless and wired devices.

Is the following a valid URL? "http://www.whitehouse.gov/"

Yes- A URL is not required to include a filename. If a filename is not provided, the web server will access a default file.

Wi-Fi refers to _____ technology.

wireless- Wi-Fi refers to a wireless computer networking standard known as IEEE 802.11.

Information on someone named Quincy Magoo.

"Quincy Magoo"- The search results include sites that have the phrase Quincy Magoo. Quotes are useful for exact phrases or exact names.

To meet the criteria for 2G technology, cellular networks and devices needed to support _____ transmission.

2G- 2G technology supported digital transmission, whereas 1G technology supported analog transmission.

Can an 802.11n router can communicate with computers that only support older versions of WiFi?

802.11 versions are designed to be backwards compatible with older versions. Some devices will reference multi-standard support. Ex: 802.11bgn or 802.11b/g/n.

Which is the most recent version of the wireless computer networking standard?

802.11ac wave2 was released in 2016. 802.11ac wave2 is the most recent version of the wireless standard.

John needs to buy a new router. He wants to watch movies and play video games using his home's wireless network. Which router should John buy: 802.11b or 802.11n?

802.11n is a later version (n comes after b) and supports speeds greater than 20 Mbps and is sufficient to stream video.

Which devices are able to communicate using Wi-Fi: Computers, Smartphones, or a variety of devices?

A Variety- An increasing number of devices are Wi-Fi enabled, including televisions, thermostats, ovens, kettles, watches, toilets, among many more.

Modem

A modem combines/separates data and electrical signals to enable a computer to communicate with an ISP.

Packet

A piece of information routed through a computer network. Packets contain information such as the data, data size, and destination address.

Printer

A printer is just a computer. Today, home networks may contain numerous computing devices.

Router

A router directs packets to the appropriate device.

Cell

A smaller land area within a cellular network that contains a cell tower or base station.- Large land areas are divided into smaller land areas called cells. The shape and size of a cell can vary based on the terrain, with each cell containing a cell tower that delivers a signal to devices within that cell's boundary.

ISP (Internet Service Provider)

An Internet Service Provider connects a home or office with the Internet, typically via a cable or phone line (or even satellite).

Cellular Devices

Cell phones, smartphones, tablets- People use cellular devices to communicate via voice, text, and video and to access the Internet.

What type of organization does the following web "student.gov.com" page likely belong to?

Commercial- The top-level domain is .com. The web page likely belongs to a for-profit company.

The period when the web was first developed.

Early 1990s- People/companies began obtaining personal computers, and networks were growing. Connecting those computers intelligently was becoming important.

(T/F) A web host is typically the creator of a web page.

False- A web host is a company that provides web services such as web page creation tools, storage, and serving. The creator of a web page uses a web host to make the web page accessible on the Internet.

(T/F) Websites have either an IP address or a domain name.

False- All websites have an IP address. A domain name provides an easy-to-remember name for an IP address.

(T/F) The "last mile" problem has been solved.

False- Cellular network providers have struggled to provide high-speed service to a growing number of customers because current network solutions cannot handle the load. The last mile is the most costly and difficult to maintain.

(T/F) Concrete walls amplify cellular network signals.

False- Concrete walls can actually create interference for cellular network signals, which can lead to a cellular device's battery draining faster.

(T/F) If a web server is down (such as powered off), the server may return a page saying to please try again later.

False- If a server is down, the server cannot return a page. Instead, a message may be displayed saying "Cannot reach the website" or similar.

(T/F) When moving to a new cell during a call, a cell phone continues to receive a signal from the tower in the original cell.

False- In a new cell, a phone receives a signal from a new cell tower, which is called switching or handover.

(T/F) Web browsers are largely independent of search engines.

False- In contrast, browsers typically have tight financial relationships with search engines.

(T/F) To search the web, a user must first navigate to a search engine's website.

False- Most browsers allow search words to be typed directly into the URL box or a special search box.

(T/F) Creating a web page requires professional web page designers, typically at large corporations.

False- Most web pages are created by regular people.

(T/F) A computing expert is needed to set up and maintain a home network.

False- Only a basic understanding of networking components is needed. The key is to follow instructions carefully.

(T/F) When moving to a new cell during a call, a cell phone receives a signal from a new tower with the same original frequency.

False- The same frequencies cannot be in adjacent cells, thus when a phone moves to a new cell, the phone's signal must switch to a new frequency to maintain the call.

(T/F) Once the search results are provided, a web crawler visits web pages clicked on by the user to ensure the results were correct.

False- Web crawlers pre-visit web pages so that search engines know which web pages to recommend.

(T/F) Microsoft's Bing was the first search engine.

False- Yahoo! and Google began in the 1990s, when the web was still young; Bing did not appear until 2009.

The protocol for transferring files among computers via the web.

HTTP- Short for "hyper-text transfer protocol". A protocol is a set of rules.

Another name for the web that was considered by the web's creator.

Information Mesh- He instead settled on the World Wide Web (hence the leading "www" in many website names).

The _____ determines the criteria for cellular network standards.

International Telecommunication Union- ITU determines cellular network standards and informs network providers and device developers of the standards.

A(n) _____ typically provides homeowners and businesses with a connection to the internet.

Internet Service Provider (ISP)- Numerous ISP's are available. Subscribers can usually choose from different types of Internet services, such as cable, DSL, or satellite, among others.

Cellular devices are rapidly replacing _____ in U.S. households.

Landlines- As of 2013, 41% of U.S. households only used cellular devices to make phone calls.

A link is provided to update a PIN used for banking transactions. Given the following domain name "www.citibaaank.com", is the web page trustworthy?

No- Misspelled words should serve as a warning sign that a web page is suspicious.

Is www.nasa.gov a valid URL?

No- The protocol identifier http is missing. A web browser will assume the user meant http://www.nasa.gov and go to NASA's web page.

A student receives an email with a link to enter a student ID for a coupon to the college's bookstore. Given the following domain name "ValleyCollege.edu.bookstore.coupon", should the student proceed?

No- The top-level domain is .coupon, so the link does not belong to an educational institution.

Is this a valid HTML link? <a "http://cnn.com"> CNN </a>

No-Missing this part: href=

Communication link

Physical mechanisms used to send information. Communication links can include a combination of wires, fiber optic cable, and wireless satellite links.

When restoring power to network devices, which ordering is recommended?

Power is typically restored starting from the devices closest to the wall, waiting 30-60 seconds to ensure each device fully starts before proceeding to the next device.

A _____ is a special type of computer that sends a packet toward the packet's destination.

Router- Routers are intermediate devices that determine how to deliver a packet based on the packet's destination address.

In 2013, which country had the largest number of public hotspots?

South Korea had approximately 187,000 hotspots.

Internet Protocol (IP)

Specifies how to communicate over the Internet. The Internet Protocol specifies what is included in a packet. Ex: The destination address must be provided first, followed by the size of the message, followed by the message.

(T/F) A 404 message indicates that a domain name is not recognized.

True- A 404 means that the website was reached (the domain name is valid and the web server is working), but the web server could not find the requested page, often due to a misspelling, or out-of-date page link.

(T/F) The name "Google" is similar to the word for a very large number, relating to the large number of pages that Google searches.

True- Google refers to the number 10100, whose actual spelling is "googol".

(T/F) ICANN is responsible for managing domain names and IP addresses.

True- ICANN is a non-profit organization contracted by the U.S. Dept. of Commerce. Billions of domain names and IP addresses are tracked and maintained.

(T/F) A phone call can drop because a signal cannot be switched to a nearby tower.

True- If signal interference affects a nearby cell tower or a cellular network provider has no towers in the nearby area, a cell phone can drop a call and lose service.

(T/F) Cell phone batteries drain quickly on airplanes when not in airplane mode.

True- Planes fly above cell towers, so phones on planes are not close enough to receive a signal from the towers. Being so far from the towers leads to batteries draining quickly.

(T/F) Leading search engines earn billions from ads provided alongside search results.

True- Search engine revenues are in the billions annually.

(T/F) A domain name registrar is a company that helps a user register a domain name.

True- Users do not directly interact with ICANN. A domain name registrar is authorized to carry out domain name registrations.

A "reboot" of the network involves _____.

Turning devices off, then on. Many problems can be fixed simply by rebooting.

(T/F) _____ may reveal the target URL if a domain is forwarded.

Unmasked Forwarding- Forwarding simply redirects visitors from a domain to the target URL. Masked forwarding is needed to hide the target URL.

Cellular Network Providers

Verizon, AT&T, Sprint- Cellular network providers deliver cellular network access to customers.

Search engines speed up searching by using _____.

Web Crawlers- Search engines maintain a pre-populated list of words and web pages. The index provides a fast way to return search results that would otherwise take hours.

Is the following a valid URL? "http://www.nasa.gov/cubequest/details/#.VOaO_VPF9U9"

Yes- The URL refers to the cubequest and details subfolders on www.nasa.gov. Special characters such as '?' or '#' give the web server more information.

Is this a valid HTML link? <a href="https://www.youtube.com/watch?v=uu7XCEMdSHg"> News </a>

Yes- The items after www.youtube.com are used by YouTube to find a specific video file.

Is this a valid HTML link? <a href="http://cnn.com"> News </a>

Yes- The text that will appear, News, is often different than the URL being linked to.

A program designed for viewing web pages.

browser- displays HTML files in a formatted way.

Degrees at San Jose State University.

degrees site:sjsu.edu- The search results include sites on domains ending with sjsu.edu and have the word Degrees.

cnn.com is a(n) _____.

domain name- A domain name provides an easy-to-remember name for a user to reach a website.

Job data provided by the U.S. government.

job data site:.gov- The search results are restricted to domains ending in .gov, which are U.S. government sites (local, state, or federal) that have the words Job or data.

5G is the _____ cellular standard.

newest- released in 2018, supporting increasing numbers of simultaneous users.

Resumes in the form of a word document.

resume filetype:doc- The search results include .doc files (word documents) that have the word resume.

Research studies on smoking and cancer.

smoking cancer (searched on scholar.google.com)- Searching on scholar.google.com searches academic articles.

Songs that include the verse: Can't live without you.

song "can't live without you": The quotes around the words "can't live without you" cause a search specifically for pages with that phrase (those words in that order), along with the word "songs".

Which file does the following URL access? "http://www.weather.com/summer/temperatures.htm"

temperatures.htm- The subfolder is summer, and the file is temperatures.htm.

A DNS server converts _____.

the domain name to an IP address- Given a domain name, a DNS server returns an IP address to which to send a packet.

Light in the early morning or evening. (Note: A popular movie named Twilight exists.)

twilight -movie: The search omits movie related sites by using a minus before the word movie.