1. Which of the following statements correctly defines a TCP/IP layer? More than one definition may be correct.

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A. The network access layer handles the physical parts of sending and receiving data.The network access layer handles the physical parts of sending and receiving data.

B. The Internet protocol layer controls the movement of packets throughout the network.The Internet protocol layer controls the movement of packets throughout the network.

C. The transport protocol divides data into packets and acknowledges these have been received.The transport protocol divides data into packets and acknowledges these have been received.

D. The DNS protocol manages the application that requires network communication and facilitates communication.

2. Which of the following is true about geographic information systems (GIS)? More than one answer may be correct.

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A. A GIS uses a global positioning system (GPS) powered by at least 24 satellites.A GIS uses a global positioning system (GPS) powered by at least 24 satellites.

B. Combined with GPS, GIS is used to guide the transport of goods to different locations.Combined with GPS, GIS is used to guide the transport of goods to different locations.

C. Spatial data generated from GIS is used by organizations to make better decisions.Spatial data generated from GIS is used by organizations to make better decisions.

D. GIS data is only available to users and organizations in the form of maps.

3. In order for a new block to be added to the blockchain, four criteria must be met. Which of the following are examples of the required criteria? More than one answer may be selected.

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A. A hardware company purchases lumber.A hardware company purchases lumber.

B. The digital signature of the vendor and consumer, as well as the transaction amount and date and time of purchase are stored on a block.The digital signature of the vendor and consumer, as well as the transaction amount and date and time of purchase are stored on a block.

C. An independent bookstore pays off a line of credit used to purchase a bulk order of J.K. Rowlings most recent novel.An independent bookstore pays off a line of credit used to purchase a bulk order of J.K. Rowlings most recent novel.

D. An importer wants to check on the status of items he ordered from China last month.