Question 1

The ________ allows a natural language expression, such as Google.com to represent a numeric IP address.

Accepted Answer

The domain name system (DNS) allows natural language expressions (domain names like Google.com) to be translated into a numeric IP address, which is what computers use to identify and communicate with each other on the internet. A uniform resource locator (URL) is a specific type of web address that includes the protocol used to access the resource, the domain name or IP address of the server hosting the resource, and the specific location of the resource on that server. The Internet protocol addressing schema (IP addressing schema) is a set of rules for assigning unique IP addresses to devices connected to the internet. The assigned numbers and names (ANN) system is a historical system used to assign numerical values and names to things like protocols, ports, and services on the internet.

Question 2

How long does it take for 300,000 X-rays to be transmitted on a 100-gbps network?

Accepted Answer

To calculate the time it takes for 300,000 X-rays to be transmitted, we need to first find out the total amount of data that needs to be transmitted. Let's assume that each X-ray is 1 MB in size (this is just an estimate, as the size of X-ray images can vary widely).

Total amount of data = 300,000 X-rays x 1 MB/X-ray = 300,000 MB

Converting MB to bits, we get:

300,000 MB x 8 bits/MB = 2,400,000,000 bits

Now, we can use the formula:

Time = Amount of data ÷ Bandwidth

Time = 2,400,000,000 bits ÷ 100,000,000,000 bits/second (100 Gbps = 100,000,000,000 bits/sec)

Time = 0.024 seconds

So, the correct answer is B) 1 minute (since 0.024 seconds is less than a second and we need to convert it to minutes).

To do this, we divide 60 (the number of seconds in a minute) by 0.024:

60 ÷ 0.024 = 2500

Therefore, it would take approximately 1 minute and 40 seconds to transmit 300,000 X-rays on a 100-gbps network. However, since none of the answer choices are 1 minute and 40 seconds, the best choice is B) 1 minute.

Question 3

The backbone of the Internet is formed by:

Accepted Answer

Network Service Providers (NSPs) make up the backbone of the Internet. These large companies provide the high-speed data links and connections necessary for the Internet to function. While IXPs, ISPs, and MAEs are also important components of the Internet infrastructure, they rely on NSPs to connect them to the larger network.

Question 4

Which of the following protocols is used to send mail to a server?

Accepted Answer

IMAP (Internet Message Access Protocol) is a protocol used for accessing and retrieving email messages from a mail server. It is the most commonly used protocol for sending email to a server. FTP (File Transfer Protocol) is used for transferring files, HTTP (Hypertext Transfer Protocol) is used for web browsing, and SSL (Secure Sockets Layer) is a security protocol used to encrypt data transmissions.

Question 5

Which of the following organizations coordinates the Internet's systems of unique identifiers, such as IP addresses and top-level domain systems?

Accepted Answer

ICANN (Internet Corporation for Assigned Names and Numbers) is responsible for coordinating the Internet's systems of unique identifiers, such as IP addresses and top-level domain systems. IETF (Internet Engineering Task Force) develops and promotes Internet standards, IAB (Internet Architecture Board) provides oversight of the technical management of the Internet, and W3C (World Wide Web Consortium) develops web standards.

Question 6

The layer of Internet architecture that ties the applications to the communications network and includes such services as security and authentication is called the:

Accepted Answer

The description matches the Middleware Services layer, which provides common services for applications and ties them to the lower layers of the architecture. This includes security and authentication services. The Network Technology Substrate layer provides physical connectivity and routing, the Transport Services and Representation Standards layer provides protocols for data transfer, while the Applications layer includes the specific applications used by end-users.

Question 7

Which of the following is not an advantage of client/server computing over centralized mainframe computing?

Accepted Answer

Each client added to the network does not necessarily increase the network's overall capacity and transmission speeds. In fact, too many clients can overload the network and decrease performance.

Question 8

TCP/IP operates in which layer of Internet architecture?

Accepted Answer

TCP/IP operates in the Transport Services and Representation Standards layer of Internet architecture. This layer is responsible for end-to-end reliability, flow control, and error recovery. TCP/IP protocols provide these services to the applications layer above it.

Question 9

________ is a utility program that allows you to check the connection between your client and a TCP/IP network.

Accepted Answer

Ping is a utility program that sends an Internet Control Message Protocol (ICMP) echo request to a remote computer and measures the response time and any packets lost in the process. This allows you to check the connectivity between your client and a TCP/IP network. Telnet, Tracert, and Finger are all utility programs, but they serve different purposes than checking a network connection.

Question 10

________ is a model of computing in which firms and individuals obtain computing power and software applications over the Internet, rather than purchasing and installing it on their own computers.

Accepted Answer

Cloud computing is a model of computing where computing power and software applications are obtained over the internet rather than being purchased and installed on individual computers. Cloud computing offers on-demand access to computing resources which includes servers, storage, databases, and applications, without requiring the user to have a physical presence or infrastructure.

Question 11

An IPv4 address is expressed as a:

Accepted Answer

An IPv4 address is a 32-bit number that appears as a series of four separate numbers separated by periods.

Question 12

________ is one of the original Internet services and is used to transfer files from a server computer to a client computer and vice versa.

Accepted Answer

FTP (File Transfer Protocol) is the service used for transferring files between a server computer and a client computer. This protocol was one of the early services available on the internet and is still commonly used today. FTP is often used to transfer large files or to upload website files to a server.

Question 13

Which of the following is not a concern about IoT?

Accepted Answer

While the cost of sensors may be a consideration in implementing an IoT system, it is not considered a major concern compared to the issues of interoperability, security, and privacy. Therefore, option A is not a concern about IoT.

Question 14

The address used by a browser to identify the location of content on the Web is called:

Accepted Answer

The correct term for the address used by a browser to identify the location of content on the Web is a uniform resource locator (URL). While domain names and IP addresses are also important aspects of how the Web works, they are not the specific identifier used in a browser's address bar. A file path may be used to identify the location of content on a local computer, but not on the Web.

Question 15

The Web runs in which layer of Internet architecture?

Accepted Answer

The Web is an application layer service that runs on top of the transport services and representation standards layer. This layer provides the necessary protocols and standards for exchanging information between applications, and the Web is a prime example of how these protocols can be used to create a global network of interconnected computers.

Question 16

Where does TLS operate within TCP/IP?

Accepted Answer

TLS operates between the Transport Layer and the Application Layer in the TCP/IP model. It provides security at the transport layer for communication between applications.

Question 17

Which of the following is the core communications protocol for the Internet?

Accepted Answer

TCP/IP (Transmission Control Protocol/Internet Protocol) is the core communications protocol for the Internet. It provides the standard for communication among devices and networks globally. Telnet, FTP, and TLS are all protocols used for different purposes but are not the core protocol for the Internet.

Question 18

Which of the following statements about cloud computing is not True?

Accepted Answer

A private cloud typically has only one tenant, which is the organization that owns and manages the cloud infrastructure.

Question 19

The Internet Layer of TCP/IP is responsible for which of the following?

Accepted Answer

The Internet Layer is responsible for addressing, packaging, and routing messages in the TCP/IP protocol suite. It provides logical addressing, which allows packets to be routed to their destination across different networks.

Question 20

The Transport Layer of TCP/IP is responsible for which of the following?

Accepted Answer

The Transport Layer of TCP/IP is responsible for providing communication with the application by acknowledging and sequencing the packets to and from the application. It ensures that packets are delivered reliably and in order to the correct application. It also provides flow control and congestion control mechanisms to prevent network congestion. The other options (A, B, and D) describe responsibilities of other layers of the TCP/IP protocol stack.

Quiz 3: E-Commerce Infrastructure: the Internet, Web, and Mobile Platform