Week 4; Data Link Layer

1. Which layer of the OSI model is the Data Link Layer?

• First layer
• Second layer
• Third layer
• Fourth layer
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2. What is the primary function of the Data Link Layer?

• Providing addressing
• Providing flow control
• Providing error-free transmission
• All of the above
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3. What is a MAC address?

• An address assigned to a computer by the user
• An address assigned to a computer by the internet service provider
• An address assigned to a computer by the manufacturer
• None of the above
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4. What is a frame?

• A packet of data
• A group of packets of data
• A unit of data sent over a network
• A unit of data received from a network
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5. Which of the following is not an error detection and correction technique?

• Parity checking
• Checksums
• Cyclic redundancy checks (CRCs)
• Packet switching
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6. What is switching?

• Forwarding data packets between network segments or devices
• Transmitting data in packets
• Providing addressing for data packets
• Providing flow control for data packets
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7. What is circuit switching?

• Forwarding data packets between network segments or devices
• Transmitting data in packets
• Establishing a dedicated communication path between two devices
• Allowing packets to take different paths to their destination
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8. What is packet switching?

• Forwarding data packets between network segments or devices
• Transmitting data in packets
• Establishing a dedicated communication path between two devices
• Allowing packets to take different paths to their destination
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9. What is store-and-forward switching?

• A type of packet switching where the switch forwards packets as soon as the destination address is received
• A type of packet switching where the switch forwards packets after inspecting the first 64 bytes
• A type of packet switching where the switch forwards packets only after receiving the entire packet
• None of the above
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10. What is cut-through switching?

• A type of packet switching where the switch forwards packets as soon as the destination address is received
• A type of packet switching where the switch forwards packets after inspecting the first 64 bytes
• A type of packet switching where the switch forwards packets only after receiving the entire packet
• None of the above
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