OSI Reference Model and TCP/IP Protocol Suite
Layer 2 of the Open Systems Interconnection (OSI) model.
Data Link Layer (OSI)
operates at Layer 3 and is responsible for the transmission of data. It does not do any error correction itself.
IP
Moves data between the link and transport layers
Internet Layer (TCP/IP)
This is the layer where IP operates.
Internet Layer (TCP/IP)
aligns with layer 3 of the OSI model (Network Layer)
Internet Layer (TCP/IP)
performs fragmentation and reassembly of data packets
Internet Layer (TCP/IP)
Layer 6 of the Open Systems Interconnection (OSI) model.
Presentation Layer (OSI)
operates at Layer 4 and is responsible for making sure that the data that the source device sends arrives at its destination.
TCP
Defines how devices should be connected over the Internet and how data should be transmitted between those devices.
TCP/IP (Transmission Control Protocol/Internet Protocol)
Layer 4 of the Open Systems Interconnection (OSI) model.
Transport Layer (OSI)
TCP and UDP are the protocols that operate at this layer. TCP is used when data loss cannot be tolerated (file transfer). UDP is used when some data loss is acceptable (when speed is more important than accuracy; ex: video streaming).
Transport Layer (OSI)
Layer 7 of the Open Systems Interconnection (OSI) model.
Application Layer (OSI)
OSI layer that is closest to the User.
Application Layer (OSI)
This Layer provides network services to the applications of the user, such as email, file transfer, and terminal emulation
Application Layer (OSI)
This layer differs from other layers in that it does not provide services to any other OSI layer
Application Layer (OSI)
This layer provides services only to applications outside the OSI model
Application Layer (OSI)
establishes the availability of intended communication partners
Application Layer (OSI)
this layer synchronizes and establishes agreement on procedures for error recovery and control of data integrity
Application Layer (OSI)
Corresponds to Layers 5,6, and 7 of the OSI model
Application Layer (TCP/IP)
This Layer supports network APIs, which allow programs that have been created for a particular operating system to access the network.
Application Layer (TCP/IP)
This layer provides applications for file transfer, network troubleshooting, and Internet activities.
Application Layer (TCP/IP)
This layer ensures that the information that is sent at the application layer of one system is readable by the application layer of another system
Presentation Layer (OSI)
when a PC program is communication with another computer, each computer might be using a different encoding scheme. This layer has to translate among multiple data formats using a common format.
Presentation Layer (OSI)
Layer 5 of the Open Systems Interconnection (OSI) model.
Session Layer (OSI)
This Layer synchronizes dialog between the presentation layers of the two hosts and manages their data exchange.
Session Layer (OSI)
establishes, manages, and terminates sessions between two communicating hosts.
Session Layer (OSI)
this layer offers provisions of efficient data transfer, CoS(Class of Service), and exception reporting of session layer, presentation layer, and application layer problems.
Session Layer (OSI)
web servers have many users, so there are many communication processes open at a given time. This Layer keeps track of which user communicates on which path.
Session Layer (OSI)
comprises only four layers
TCP/IP (Transmission Control Protocol/Internet Protocol)
Routes packets of data to remote hosts
Internet Layer (TCP/IP)
it routes data from the source to the destination by defining the packet and the addressing scheme
Internet Layer (TCP/IP)
Like Layer 2 of the OSI model, this layer of the TCP/IP model is concerned with hardware addresses
Link Layer (TCP/IP)
This Layer involves components such as cables, connectors, and network cards like OSI Layer 1.
Link Layer (TCP/IP)
this layer is also known as the network access layer and is equivalent of both the physical and data link layers of the OSI model.
Link Layer (TCP/IP)
Layer 3 of the Open Systems Interconnection (OSI) model.
Network Layer (OSI)
this later manages the connectivity of users by providing logical addressing.
Network Layer (OSI)
this layer provides connectivity and path selection between two host systems that may be located on geographically separated networks.
Network Layer (OSI)
provides a means of describing how data is transmitted over a network. Addresses hardware, software, and data transmission.
OSI reference model
Layer 1 of the Open Systems Interconnection (OSI) model.
Physical Layer (OSI)
This Layer enables bit transmission between end devices
Physical Layer (OSI)
this layer defines specifications, which are needed for activating, maintaining, and deactivating the physical link between end devices.
Physical Layer (OSI)
this layers specs are defining characteristics ex: voltage levels, timing of voltage changes, physical data rates, maximum transmission distances, physical connectors, and other similar attributes
Physical Layer (OSI)
this layer defines how data is formatted for transmission and how access to physical media is controlled
Data Link Layer (OSI)
this layer typically includes error detection and correction to ensure a reliable delivery of the data.
Data Link Layer (OSI)
This layer breaks down large files into smaller segments that are less likely to incur transmission problems.
Transport Layer (OSI)
this layer defines services to segment, transfer, and reassemble the data for individual communications between the end devices.
Transport Layer (OSI)
This Layer provides communication services directly to the application processes that are running on network hosts.
Transport Layer (TCP/IP)
This layer is the core of the TCP/IP architecture.
Transport Layer (TCP/IP)
aligns with Layer 4 of the OSI model (Transport)
Transport Layer (TCP/IP)