Network Models

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Questions and Answers

What is a Network Model?

A device to connect networks

A common set of rules to follow when creating networking hardware and software (correct)

A type of network architecture

A unique identifier for networking hardware

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?

Multiple Protocols. Signup and view all the answers

What is the OSI Physical Layer?

The lowest, or first layer of the OSI model. Signup and view all the answers

What does the OSI Data Link Layer use to send a frame within the network?

MAC Addresses. Signup and view all the answers

What is the role of the OSI Network Layer?

Routes packets according to IP addresses. Signup and view all the answers

What must be chopped before being sent on the network in the OSI Transport Layer?

Chunks of data. Signup and view all the answers

What does the OSI Session Layer handle?

Connecting applications to applications. Signup and view all the answers

What is the OSI Presentation Layer responsible for?

Managing and translating information into an understandable format. Signup and view all the answers

What does the OSI Application Layer refer to?

The software using the data. Signup and view all the answers

What is a Frame?

When the network interface card takes the packets and wraps them up. Signup and view all the answers

What does the Network Interface Card (NIC) serve as?

Interface between the PC and the network. Signup and view all the answers

What is the Destination MAC Address Field?

This 6-byte field is the identifier for the intended recipient. Signup and view all the answers

What does the Source MAC Address Field identify?

The frame's originating NIC or interface. Signup and view all the answers

What does the Type Field indicate?

The upper layer service contained in the frame. Signup and view all the answers

What is the maximum size of the Frame Data Field?

1500 bytes. Signup and view all the answers

What does the Frame Check Sequence (FCS) do?

Uses CRC when receiving to verify data arrived intact. Signup and view all the answers

What is the Logical Link Control (LLC) Layer?

A sublayer of the Data Link layer. Signup and view all the answers

What does the Media Access Control (MAC) Layer create?

Frames. Signup and view all the answers

What is a Subnet?

A logical subset of a larger network. Signup and view all the answers

What is a Logical Address in networking?

The address for each node on an IP network. Signup and view all the answers

What is the Physical Address?

An actual address in the main memory device. Signup and view all the answers

What do Network Protocols create?

Unique identifiers for each system. Signup and view all the answers

Study Notes

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.

Network Models - Mike Meyers Network+ Chapter 1

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