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Networking Beginner

What is TCP/IP?

The fundamental communication protocol suite of the internet that defines how data is packaged, addressed, transmitted, and received.

TCP/IP (Transmission Control Protocol/Internet Protocol) is a layered protocol stack. TCP provides reliable, ordered, error-checked data delivery. IP handles addressing and routing packets across networks.

The model has four layers: Application (HTTP, SMTP), Transport (TCP, UDP), Internet (IP), and Network Access (Ethernet, Wi-Fi). Together they enable all internet communication.

Related Terms

DNS Propagation
The time it takes for DNS record changes to spread across all DNS servers worldwide, typically taking up to 48 hours.
SDN (Software-Defined Networking)
An approach that separates the network control plane from the data plane, enabling centralized, programmable network management.
NAT (Network Address Translation)
A method of mapping private IP addresses to public IP addresses, allowing multiple devices to share a single public IP.
Network ACL
A set of rules that control inbound and outbound traffic at the subnet level, acting as a stateless firewall in cloud and enterprise networks.
ICMP (Internet Control Message Protocol)
A network protocol used for diagnostic and error reporting, including ping and traceroute functionality.
VPN (Virtual Private Network)
A technology that creates an encrypted tunnel between your device and a remote server, securing internet traffic.
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