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TCP/IP Model / OSI Model (Physical layer (Definition: Provides services…
TCP/IP Model / OSI Model
Physical layer
Definition: Provides services for the transmission of bits over the cable media
Encapsulation BITS
Cable Media, NIC, Hubs
Data Link
MAC Layer and LLC Layer
Switches manage the network transmission based on MAC Addresses (MAC Address Table)
Definition: Protocols and function to help transmit data between data links
Network layer
Routers and Layer 3 Switches
Encapsulation PACKETS
Definition: Best path Determination
Transport Layer
Encapsulation: SEGMENTS
Protocols: TCP:UDP
Definition: Provides services to end-to-end transmission and determines if it is reliable or unreliable based on protocols used.
Session Layer
Encapsulation DATA
Definition: Establishes a session and exchanges information with both Presentation and transport layer
Presentation Layer
Definition: Provides Services to the application layer in the proper format of the message (eg. JPEG)
Application Layer
Definition: Includes all the services of the users
Protocols: HTTP, HTTPS, SMTP, POP3, IMAp, FTP, TFTP, DHCP, DNS, BOOTIP,.......
Link Layer
Ethernet Layer: Encompases the physical and data link layer of the OSI Model
Internet Layer
Network layer of the OSI Model
Transport Layer
Transport Layer is Layer four of the OSI Model
Application Layer
The Application Layer is all three of the Data Layer of the OSI Model (Application, Presentation, and Session Layers