Questions and Answers
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 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?
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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?
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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?
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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?
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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?
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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?
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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?
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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.
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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?
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Which of the following is not a protocol operating at the Network layer of the OSI model?
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Ed is a software developer who has been given the task of creating an application that requires guaranteed delivery of information between end systems. At which layer of the Open Systems Interconnection (OSI) model does the protocol that provides the guaranteed delivery run, and what type of protocol must Ed use?
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Alice is a network administrator designing a new local area network (LAN). She needs to determine the type of cabling and the network topology to implement. Which layers of the Open Systems Interconnection (OSI) model apply to cabling and topology elements?
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Which layers of the Open Systems Interconnection (OSI) model do not have protocols in the TCP/IP suite exclusively dedicated to them?
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The protocols at which layer of the Open Systems Interconnection (OSI) model use port numbers to identify the applications that are the source and the destination of the data in the packets?
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Which of the following is a correct listing of the Open Systems Interconnection (OSI) model layers, in order, from top to bottom?
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At which of the Open Systems Interconnection (OSI) model layers do switches and bridges perform their basic functions?
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On a TCP/IP network, flow control is a function implemented in protocols operating at which layer of the Open Systems Interconnection (OSI) model?
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Which layer of the Open Systems Interconnection (OSI) model defines the medium, network interfaces, connecting hardware, and signaling methods used on a network?
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Which of the OSI model layers is responsible for syntax translation and compression or encryption?
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Which layer of the Open Systems Interconnection (OSI) model is responsible for transmitting signals over the network medium?
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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.
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An Ethernet network interface adapter provides functions that span which two layers of the Open Systems Interconnection (OSI) model?
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Which of the following protocols operate at the Application layer of the Open Systems Interconnection (OSI) model?
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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?
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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?
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Which of the following devices run exclusively at the Physical layer of the Open Systems Interconnection (OSI) model?
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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?
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Study Notes
OSI Model Overview
- OSI (Open Systems Interconnection) model consists of seven layers that standardize network communication.
- Each layer has specific functions and protocols that cater to different aspects of data transmission.
Layers and Functions
- Data Link Layer uses MAC addresses for identifying computers on a LAN.
- OSI model was developed by the International Organization for Standardization (ISO).
- Network Layer is responsible for logical addressing and routing of datagrams over a network.
- Multiple layers (Data Link, Network, Transport) encapsulate application data into packets for transmission.
- Presentation Layer translates and formats information for the application layer.
Networking Devices
- Routers operate at the Network Layer, facilitating data routing between networks.
- Switches can function at both Data Link and Network Layers, handling data frames and connections.
- Ethernet’s Carrier Sense Multiple Access with Collision Detection (CSMA/CD) operates at the Data Link Layer for regulating access to the network.
Protocol Responsibilities
- The TCP/IP model aligns with the OSI layers, with Transport Layer protocols offering connection-oriented and connectionless services.
- Flow control is primarily implemented within Transport Layer protocols.
- Network Layer protocols, like IP, handle data delivery to final destinations.
Cabling and Topology
- Physical and Data Link Layers pertain to cabling types and network topology design considerations.
Protocols and Applications
- Application Layer protocols, such as HTTP and SNMP, facilitate user interaction and data exchange.
- Some protocols, like UDP, operate at the Transport Layer without guaranteeing data delivery.
Layer Specific Protocols
- Presentation Layer handles syntax translation and data compression/encryption tasks.
- Physical Layer is responsible for the physical transmission of signals over networking mediums.
Hardware Interaction
- Dedicated physical hardware devices are commonly associated with the Physical and Data Link Layers.
- Ethernet network interfaces function across both Physical and Data Link Layers.
Conversion and Interoperability
- Gateways provide interoperability for systems using different protocols at various OSI model layers, allowing seamless communication.
Summary of Protocols
- Distinction exists for protocols; for example, ICMP and IGMP operate at the Network Layer but serve different functions than transmission encapsulating protocols like TCP or UDP.
- Understanding the specifics of each layer, including the nature of encapsulation and protocols involved, is crucial for network design and troubleshooting.
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Description
Test your knowledge of the OSI model in this quiz focused on networking fundamentals. You'll encounter questions about media access control (MAC) addresses and the organizations behind the OSI model. Perfect for students and IT professionals alike!
