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Questions and Answers
Which layer is responsible for ensuring end-to-end delivery of data?
Which layer is responsible for ensuring end-to-end delivery of data?
- Network Layer
- Data Link Layer
- Transport Layer (correct)
- Application Layer
What is the primary function of the Presentation Layer?
What is the primary function of the Presentation Layer?
- Logical addressing
- Ensuring the best path to the destination
- Data encryption and decryption (correct)
- Physical addressing
Which layer is responsible for determining the best path to reach the destination?
Which layer is responsible for determining the best path to reach the destination?
- Data Link Layer
- Network Layer (correct)
- Session Layer
- Application Layer
What does the Session Layer primarily manage?
What does the Session Layer primarily manage?
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Which layer is responsible for logical addressing in a network?
Which layer is responsible for logical addressing in a network?
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In the OSI model, which layer is responsible for defining the physical characteristics of the network?
In the OSI model, which layer is responsible for defining the physical characteristics of the network?
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Study Notes
The OSI Model
- The OSI model consists of 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application
Layer 1 - The Physical Layer
- Responsible for all physical properties of the network
Layer 4 - The Transport Layer
- Responsible for the actual mechanism of:
- End-to-end delivery
- Logical addressing (e.g. IPv4, IPv6, IPX, APPLE TALK)
- Routing (choosing the best path to the destination) (e.g. RIP, OSPF, IS-IS, EIGRP)
Layer 6 - The Presentation Layer
- Responsible for presenting data in the proper format
Layer 2 - The Data Link Layer
- Responsible for:
- Framing
- Error detection and correction
- Flow control
- Media access control
Other Layers
- Layer 7 - The Application Layer: responsible for protocols such as Email (SMTP, POP3), Web browsers (HTTP), FTP, and Telnet
- Layer 5 - The Session Layer: responsible for establishing, managing, and terminating connections between applications
- Layer 3 - The Network Layer: responsible for routing data between networks
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