What is TCP/IP?
Turkish: TCP/IP
TCP/IP is the protocol suite that defines addressing, packet routing, and reliable data transfer across internet-connected networks.
What is TCP/IP?
TCP/IP is not a single protocol; it is the family of protocols that makes internet communication possible. IP decides how packets are addressed and routed between networks, while TCP turns those packets into an ordered, reliable stream for applications.
How Does It Work?
When a browser opens a website, the domain is first resolved to an IP address and then a connection is established between the client and the server. Data is split into packets, may travel through different routes, and is reassembled by the receiver.
TCP adds connection setup, sequence numbers, acknowledgements, and retransmission to reduce missing or out-of-order data. IP handles addressing and routing so each packet can move toward the destination network.
Layers and Examples
In the TCP/IP model, application protocols such as HTTP, SMTP, and DNS sit above the transport layer. TCP and UDP handle transport, IP handles internet routing, and technologies such as Ethernet or Wi-Fi provide network access.
Business Use
Understanding TCP/IP helps teams diagnose network outages, separate server reachability issues from application bugs, and design firewall rules. For example, a “website is down” report may involve DNS resolution, TCP connection failure, TLS negotiation, or a slow application response.
Related Terms
BGP is the internet routing protocol where autonomous systems announce which IP prefixes can be reached through which paths.
DNS (Domain Name System)DNS maps readable domain names to IP addresses so browsers, email servers, and APIs can reach the right destination without hard-coded numbers.
HTTP (HyperText Transfer Protocol)HTTP is the core web communication protocol that defines request-response exchanges between browsers, API clients, and servers.
IP AddressAn IP address is a numeric label used to identify devices on a network and route data packets to the correct destination.
IPv6IPv6 is the IP version with 128-bit addressing, expanding beyond IPv4 limits for broader and more efficient modern networking.
UDP (User Datagram Protocol)UDP sends datagrams without establishing a connection, choosing low latency and low protocol overhead over delivery guarantees.