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At which of the following layers of the Open Systems Interconnection (OSI) model do the protocols on a typical local area network (LAN) use media access control (MAC) addresses to identify other computers on the network?
At which of the following layers of the Open Systems Interconnection (OSI) model do the protocols on a typical local area network (LAN) use media access control (MAC) addresses to identify other computers on the network?
Which of the following organizations developed the Open Systems Interconnection (OSI) model?
Which of the following organizations developed the Open Systems Interconnection (OSI) model?
Which layer of the Open Systems Interconnection (OSI) model is responsible for the logical addressing of end systems and the routing of datagrams on a network?
Which layer of the Open Systems Interconnection (OSI) model is responsible for the logical addressing of end systems and the routing of datagrams on a network?
On a TCP/IP network, which layers of the Open Systems Interconnection (OSI) model contain protocols that are responsible for encapsulating the data generated by an application, creating the payload for a packet that will be transmitted over a network? (Choose all that apply.)
On a TCP/IP network, which layers of the Open Systems Interconnection (OSI) model contain protocols that are responsible for encapsulating the data generated by an application, creating the payload for a packet that will be transmitted over a network? (Choose all that apply.)
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Which layer of the Open Systems Interconnection (OSI) model is responsible for translating and formatting information?
Which layer of the Open Systems Interconnection (OSI) model is responsible for translating and formatting information?
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Which of the following devices typically operates at the Network layer of the Open Systems Interconnection (OSI) model?
Which of the following devices typically operates at the Network layer of the Open Systems Interconnection (OSI) model?
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Which layer of the Open Systems Interconnection (OSI) model provides an entrance point to the protocol stack for applications?
Which layer of the Open Systems Interconnection (OSI) model provides an entrance point to the protocol stack for applications?
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Which layer of the Open Systems Interconnection (OSI) model is responsible for dialogue control between two communicating end systems?
Which layer of the Open Systems Interconnection (OSI) model is responsible for dialogue control between two communicating end systems?
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Some switches can perform functions associated with two layers of the Open Systems Interconnection (OSI) model. Which two of the following layers are often associated with network switching? (Choose all that apply.)
Some switches can perform functions associated with two layers of the Open Systems Interconnection (OSI) model. Which two of the following layers are often associated with network switching? (Choose all that apply.)
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At which layer of the Open Systems Interconnection (OSI) model are there TCP/IP protocols that can provide either connectionless or connection-oriented services to applications?
At which layer of the Open Systems Interconnection (OSI) model are there TCP/IP protocols that can provide either connectionless or connection-oriented services to applications?
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Which of the following layers of the Open Systems Interconnection (OSI) model typically have dedicated physical hardware devices associated with them? (Choose all that apply.)
Which of the following layers of the Open Systems Interconnection (OSI) model typically have dedicated physical hardware devices associated with them? (Choose all that apply.)
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At which layer of the Open Systems Interconnection (OSI) model is there a protocol that adds both a header and a footer to the information that is passed down from an upper layer, thus creating a frame?
At which layer of the Open Systems Interconnection (OSI) model is there a protocol that adds both a header and a footer to the information that is passed down from an upper layer, thus creating a frame?
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Identify the layer of the Open Systems Interconnection (OSI) model that controls the addressing, transmission, and reception of Ethernet frames, and also identify the media access control method that Ethernet uses.
Identify the layer of the Open Systems Interconnection (OSI) model that controls the addressing, transmission, and reception of Ethernet frames, and also identify the media access control method that Ethernet uses.
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At which layer of the OSI model do you find the protocol responsible for the delivery of data to its ultimate destination on an internetwork?
At which layer of the OSI model do you find the protocol responsible for the delivery of data to its ultimate destination on an internetwork?
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Which of the following is not a protocol operating at the Network layer of the OSI model?
Which of the following is not a protocol operating at the Network layer of the OSI model?
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Specify the layer of the Open Systems Interconnection (OSI) model at which the Internet Protocol (IP) operates and whether it is connection-oriented or connectionless.
Specify the layer of the Open Systems Interconnection (OSI) model at which the Internet Protocol (IP) operates and whether it is connection-oriented or connectionless.
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Which layer of the Open Systems Interconnection (OSI) model is responsible for transmitting signals over the network medium?
Which layer of the Open Systems Interconnection (OSI) model is responsible for transmitting signals over the network medium?
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Which of the OSI model layers is responsible for syntax translation and compression or encryption?
Which of the OSI model layers is responsible for syntax translation and compression or encryption?
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Which of the following protocols operate at the Application layer of the Open Systems Interconnection (OSI) model? (Choose all that apply.)
Which of the following protocols operate at the Application layer of the Open Systems Interconnection (OSI) model? (Choose all that apply.)
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Which layer of the Open Systems Interconnection (OSI) model would be responsible for converting a text file encoded using EBCDIC on the sending system into ASCII code, when required by the receiving system?
Which layer of the Open Systems Interconnection (OSI) model would be responsible for converting a text file encoded using EBCDIC on the sending system into ASCII code, when required by the receiving system?
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Which of the following protocols operates at the Network layer of the OSI model but does not encapsulate data generated by an upper layer protocol for transmission over the network?
Which of the following protocols operates at the Network layer of the OSI model but does not encapsulate data generated by an upper layer protocol for transmission over the network?
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Which of the following devices run exclusively at the Physical layer of the Open Systems Interconnection (OSI) model? (Choose all that apply.)
Which of the following devices run exclusively at the Physical layer of the Open Systems Interconnection (OSI) model? (Choose all that apply.)
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Which of the following devices enables two computers to communicate when they are using different protocols at each layer of the Open Systems Interconnection (OSI) reference model?
Which of the following devices enables two computers to communicate when they are using different protocols at each layer of the Open Systems Interconnection (OSI) reference model?
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Study Notes
OSI Model Layers
- The OSI model has 7 layers: Physical, Data link, Network, Transport, Session, Presentation, and Application
Layer 2: Data Link
- Uses MAC addresses to identify computers on a LAN
- Responsible for media access control
- Ethernet uses CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
Layer 3: Network
- Responsible for logical addressing of end systems and routing of datagrams
- IP (Internet Protocol) operates at this layer
- IP is connectionless
Layer 4: Transport
- Provides reliable data transfer between devices
- TCP (Transmission Control Protocol) operates at this layer
- UDP (User Datagram Protocol) also operates at this layer
- Connection-oriented or connectionless protocols
Layer 5: Session
- Establishes, manages, and terminates connections between applications
- Responsible for dialogue control between communicating end systems
Layer 6: Presentation
- Translates and formats information
- Responsible for syntax translation and compression or encryption
Layer 7: Application
- Provides an entrance point to the protocol stack for applications
- Supports functions such as email, file transfer, and virtual terminals
Other Key Facts
- Routers operate at the Network layer
- Switches operate at the Data link layer
- Hubs and repeaters operate at the Physical layer
- Gateways enable communication between devices using different protocols at each layer
- TCP/IP protocols operate at multiple layers of the OSI model
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Description
Test your knowledge of the Open Systems Interconnection (OSI) reference model, including layers and protocols used in local area networks (LANs) and the organization that developed the OSI model.
