IT Toolbox
Terme informatique

TCP

A reliable transport protocol that establishes a connection and controls the delivery of data.

Networking
TopicIT Networking →
View my favorites

Simple definition

TCP check that the data is coming in the correct order.

Technical definition

Transmission Control Protocol uses sequence numbers, acknowledgements of receipt, retransmissions and flow control. A connection usually starts with a three-step handshake.

What is it used for ?

Transport communications where reliability is a priority, such as HTTPS, SMTP, RDP or SSH.

Practical example

When loading a web page, TCP retransmits a lost segment so that the received content remains complete.

Common issues

  • Port blocked
  • Re-Initiated connection
  • Latency increased by retransmissions
  • Session interrupted by intermediate equipment

UDP · Network port · HTTPS · SMTP · Firewall

Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.

♡ 0