Podcast
Questions and Answers
The transport layer is responsible for managing communication sessions.
The transport layer is responsible for managing communication sessions.
False (B)
The presentation layer translates data between a networking service and an application.
The presentation layer translates data between a networking service and an application.
True (A)
The application layer is where high-level protocols such as HTTP reside.
The application layer is where high-level protocols such as HTTP reside.
True (A)
TCP/IP model consists of a four-layer architecture.
TCP/IP model consists of a four-layer architecture.
The network layer in TCP/IP has a 1-to-1 relationship with the OSI network layer.
The network layer in TCP/IP has a 1-to-1 relationship with the OSI network layer.
The physical layer handles reliable transmission of data segments between points on a network.
The physical layer handles reliable transmission of data segments between points on a network.
The Physical Layer is concerned with getting data from one computer to another computer.
The Physical Layer is concerned with getting data from one computer to another computer.
The Network Layer defines how internetworks function.
The Network Layer defines how internetworks function.
Fragmentation and reassembly are tasks handled by the Transport Layer.
Fragmentation and reassembly are tasks handled by the Transport Layer.
The Data Link Layer handles error detection and handling.
The Data Link Layer handles error detection and handling.
The Transport Layer provides functions to enable communications between application processes on different computers.
The Transport Layer provides functions to enable communications between application processes on different computers.
The Physical Layer is mainly concerned with structuring and managing a multi-node network.
The Physical Layer is mainly concerned with structuring and managing a multi-node network.
The Data Link Layer is responsible for transmission of data frames between two nodes connected by a physical layer.
The Data Link Layer is responsible for transmission of data frames between two nodes connected by a physical layer.
The Network Layer deals with connection establishment, management, and termination.
The Network Layer deals with connection establishment, management, and termination.
Flow control is a function of the Transport Layer according to the OSI Model.
Flow control is a function of the Transport Layer according to the OSI Model.
Port 80 is commonly associated with the Network Layer in the OSI Model.
Port 80 is commonly associated with the Network Layer in the OSI Model.
The Data Link Layer is responsible for protocol for exchanging data between connected nodes.
The Data Link Layer is responsible for protocol for exchanging data between connected nodes.
Flashcards
OSI Model
OSI Model
A 7-layer framework defining how internetworks function.
Physical Layer (OSI)
Physical Layer (OSI)
Handles bit transmission over a physical medium. Includes details like voltage levels and data rates.
Data Link Layer (OSI)
Data Link Layer (OSI)
Transmits data frames between nodes on the network.
Network Layer (OSI)
Network Layer (OSI)
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Transport Layer (OSI)
Transport Layer (OSI)
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Session Layer (OSI)
Session Layer (OSI)
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Presentation Layer (OSI)
Presentation Layer (OSI)
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Application Layer (OSI)
Application Layer (OSI)
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TCP/IP Model
TCP/IP Model
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Link Layer (TCP/IP)
Link Layer (TCP/IP)
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Internet Layer (TCP/IP)
Internet Layer (TCP/IP)
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Transport Layer (TCP/IP)
Transport Layer (TCP/IP)
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Application Layer (TCP/IP)
Application Layer (TCP/IP)
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IP Address
IP Address
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TCP Port
TCP Port
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HTTP
HTTP
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Study Notes
OSI Model
- Defines how internetworks (interconnected networks) function
- Consists of 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application
OSI Model Layers
Physical Layer
- Concerned with transmission and reception of raw bit streams over a physical medium
- Includes duplex, data rate, voltage levels, etc.
Data Link Layer
- Responsible for transmission of data frames between two nodes connected by a physical layer
- Protocols include PPP over phone line and Ethernet on many media types
Network Layer
- Structuring and managing a multi-node network, including addressing, routing, and traffic control
- IP addresses are most commonly used
- Concerned with getting data from one computer to another computer
- Logical Addressing, Routing, Datagram encapsulation, Fragmentation and reassembly, Error handling and diagnosis
Transport Layer
- Provides functions to enable communications between application processes on different computers
- Concerned with end-to-end or host-to-host communication
- Tracking, flow control, fragmentation, Connection establishment, management, and termination
- Process level addressing, TCP port, port 80 is HTTP
- Multiplexing, Segmentation, Acknowledgement and retransmissions, Flow control
Session Layer
- Mainly concerned with application, no networking details
- Dialog between entities
- APIs – TCP/IP sockets, RPC, gRPC
Presentation Layer
- Very limited function
- Data representation
- Compression, encryption
Application Layer
- High-level protocols such as for resource sharing or remote file access, e.g. HTTP
- Provides services to end-user applications
TCP/IP Model
- Four-layer architecture
- Application (encompasses OSI application, presentation, and session layers)
- Transport (1-to-1 relationship with OSI transport layer)
- Internet (1-to-1 relationship with OSI network layer)
- Link (similar to OSI data link and physical layers)
History of TCP/IP
- Designed by engineers to solve communication problems
- Developed by DoD DARPA, Defense Advanced Research Projects Agency
- Primarily client – server model
- Basis for vast majority of network traffic
Studying That Suits You
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Description
Test your knowledge about the OSI Model layers, including Data Framing, Addressing, Error detection, and more as covered in Kozierok's Chapter 6 on Network and Transport Layers.
