OSI to TCP/IP — TechKnowSurge

About this interactive

The TCP/IP model has four layers, and each matches one or more OSI layers: Application: OSI layers 7, 6 and 5. HTTP, for example, is just an application layer protocol with no separate presentation or session layer, as is true of most protocols in use today. Transport: OSI layer 4, unchanged. TCP and UDP, port numbers, segments. Internet: OSI layer 3, the network layer, renamed. IPv4, IPv6 and ICMP; IP addressing and routing. Network access: OSI layers 2 and 1, data link and physical. Ethernet spans both, as do the other IEEE 802 standards such as Wi-Fi: MAC addresses, frames, signals and the preamble. RFC 1122 calls this the link layer. The OSI model is still worth knowing: some protocols, especially older ones, follow its separate layers, and its layer numbers are used everywhere. The TCP/IP model fits the protocols most networks run today.

What you'll learn

Map the seven OSI layers onto the four TCP/IP layers: application takes in OSI 5 to 7, transport stays the same, network becomes internet, and data link and physical become network access
Place common protocols and jobs in their TCP/IP layer, among them HTTP, TCP, UDP, IPv4, IPv6, ICMP, Ethernet and Wi-Fi

Aligned to

CompTIA Network+

1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model.

Cisco CCST Networking

1.1 Identify the fundamental conceptual building blocks of networks

1.5 Describe common network applications and protocols

ISC2 CC

4.1 Understand network security

Cisco CCNA

1.5 Compare TCP to UDP

Key terms

TCP/IP: The suite of communication protocols used to interconnect network devices on the internet.
Internet Layer: The TCP/IP model layer that corresponds to the OSI Network layer, responsible for logical addressing and routing packets across networks using protocols such as IP.
Network Access Layer: The bottom layer of the TCP/IP model that combines the OSI Data Link and Physical layers, handling hardware addressing and physical transmission on a local network.
Application Layer: The topmost layer of the OSI model (Layer 7) that provides network services directly to end-user applications.
Transport Layer: Layer 4 of the OSI model, responsible for end-to-end communication, flow control, and error recovery.
Open Systems Interconnection Model: A conceptual framework that standardizes network communication into seven distinct layers.

Topics

Tcp Ip Internet Layer Network Access Layer Application Layer Transport Layer Interactive Categorize

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