Questions and Answers
What is a Network Model?
What are Protocols?
A set of rules, regulations, standards and procedures.
What is the Open Systems Interconnection (OSI) model?
A Seven Layer Prescriptive Model.
What operates on more than one OSI layer?
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What is the OSI Physical Layer?
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What does the OSI Data Link Layer use to send a frame within the network?
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What is the role of the OSI Network Layer?
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What must be chopped before being sent on the network in the OSI Transport Layer?
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What does the OSI Session Layer handle?
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What is the OSI Presentation Layer responsible for?
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What does the OSI Application Layer refer to?
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What is a Frame?
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What does the Network Interface Card (NIC) serve as?
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What is the Destination MAC Address Field?
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What does the Source MAC Address Field identify?
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What does the Type Field indicate?
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What is the maximum size of the Frame Data Field?
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What does the Frame Check Sequence (FCS) do?
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What is the Logical Link Control (LLC) Layer?
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What does the Media Access Control (MAC) Layer create?
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What is a Subnet?
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What is a Logical Address in networking?
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What is the Physical Address?
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What do Network Protocols create?
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Study Notes
Network Models
- Networking utilizes common rules for hardware and software development, known as network models.
Protocols
- Protocols consist of rules, regulations, standards, and procedures that govern networking interactions.
Open Systems Interconnection (OSI) Model
- OSI is a seven-layer model, where each layer performs specific functions and uses protocols to provide solutions for networking tasks.
Multiple Protocols
- Certain protocols can function across multiple OSI layers, enhancing flexibility in network operations.
OSI Physical Layer
- The first layer of the OSI model; responsible for signal generation and detection for data transmission over network media.
OSI Data Link Layer
- The second layer, uses MAC addresses for frame transmission within a network. It contains two sub-layers.
OSI Network Layer
- The third layer which routes packets based on IP addresses, facilitating inter-network communication.
OSI Transport Layer
- The fourth layer where larger data chunks are segmented for transmission; also manages re-transmission of lost packets.
OSI Session Layer
- The fifth layer manages connections between applications, including initiation, acceptance, and closure of sessions.
OSI Presentation Layer
- The sixth layer translates and formats data for the application layer, making it usable for different programs.
OSI Application Layer
- The seventh layer directly utilized by software; it can provide encryption, user authentication, and other app-specific functions.
Frame
- A form of data packet used in the second layer, where packets are wrapped and sent to layer 2 devices.
Network Interface Card (NIC)
- Acts as the interface between a PC and network, featuring a unique MAC address; transmits binary data as electrical, optical, or radio signals.
Destination MAC Address Field
- A 6-byte identifier field in frames indicating the intended recipient of the data.
Source MAC Address Field
- A 6-byte field identifying the NIC from which the frame originated, must be a unicast address.
Type Field
- A 2-byte field that specifies the service of the upper layer contained within the frame.
Frame Data Field
- Contains the data payload from the application layer, with a maximum size of 1500 bytes and minimum of 46 bytes.
Frame Check Sequence (FCS)
- A 4-byte field using CRC for error-checking; verifies data integrity upon reception to ensure frames are received intact.
Logical Link Control (LLC) Layer
- A Data Link sublayer that interacts with the operating system via device drivers, ensuring flow control and managing multiple protocols.
Media Access Control (MAC) Layer
- Another Data Link sublayer responsible for frame creation, addressing, and ensuring data is transmitted correctly along network cabling.
Subnet
- A logical subdivision of a larger network, established to enhance performance and security.
Logical Address
- An IP address assigned to each node in a network for routing packets to their destination.
Physical Address
- Also known as a MAC address; a 48-bit unique identifier located in a device's main memory.
Network Protocols
- Establish unique identifiers for each system within a network, enabling seamless communication.
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Description
Test your knowledge of networking concepts with our flashcards based on Chapter 1 of Mike Meyers' Network+ Exam Guide. Learn key terms such as network models, protocols, and the OSI model to prepare for the N01-007 exam. Improve your understanding of networking fundamentals and their applications in the field.
