# c480 06/14 Network +

Term
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Which of the following network geographies refers to a network that spans several buildings within walking distance of each other, such as at a business park?

a) CAN
b) PAN
c) MAN
d) WAN
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Terms in this set (199)
A network technician at a warehouse must implement a solution that will allow a company to track shipments as they enter and leave the facility. The warehouse workers must scan each package as it enters the warehouse using a sensor. Which of the following technologies should they utilize to meet these requirements?

a) Wi-Fi
b) RFID
c) Bluetooth
d) NFC
b) RFID

-Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. The warehouse could utilize RFID to allow for the accurate scanning of items using radio frequency tracking tags and sending data of up to 2 KB to a sensor at rapid speeds.
Dion Worldwide has created a network architecture that relies on two main data centers, one in the United States and one in Japan. Each satellite office in the United States and Canada will connect back to the American data center, while each satellite office in Asia will connect back to the Japanese data center. Both the American and Japanese data centers are interconnected, as well. Therefore, if a client in the Philippines wants to send a file to the office in Miami, it will go first to the Japanese datacenter, then route across to the American datacenter, and then to the Miami satellite office. Which of the following network topologies best describes the Dion Worldwide network?

a) Hub and spoke
b) Bus
c) Star
d) Ring
b) Hub

-A hub is a network hardware device for connecting multiple Ethernet devices together and making them act as a single network segment. A hub operates at the physical layer (Layer 1) of the OSI model. All devices connected by a hub are in a single collision domain and a single broadcast domain, therefore they must use half-duplex for communication and CSMA/CD.
d) De-capsulation

- Data encapsulation and de-encapsulation in a computer network is a necessary process. De-encapsulation in networking is performed at the receiver side or destination side as data moves from layer 1 to layer 7 of the OSI model. As information travels up the layers of the OSI layer, information added from the sender's encapsulation process is removed layer by layer.
b) Layer 2

-The data layer, or layer 2, is the second layer of the seven-layer OSI model. The data link layer encapsulates data into frames for delivery between nodes on the same network. Data is transmitted at Layers 5, 6, and 7 of the OSI model.
-At Layer 4, the data is encapsulated into segments.
-At layer 3, the segments are encapsulated into packets.
-At layer 2, the packets are encapsulated into frames.
-At layer 1, the frames are encapsulated into bits.
b) Switch

-A basic switch operates at layer 2 of the OSI model. For the exam, unless they mention a "multilayer switch" or "layer 3 switch", always assume they are referencing a basic layer 2 switch.
-A router is a layer 3 device.
-A repeater is a layer 1 device.
-A firewall will operate layers 3 through 7, depending on the type of firewall.