What Does TCP Mean in 200-301?
Full form: Transmission Control Protocol
Also known as: Transmission Control Protocol
Quick Definition
A Layer 4 connection-oriented protocol that guarantees reliable, ordered delivery.
Full Definition
TCP is a Layer 4 (Transport layer) protocol that provides reliable, ordered, and error-checked delivery of data between applications. It uses a three-way handshake (SYN, SYN-ACK, ACK) to establish a connection before data transfer. TCP uses sequence numbers, acknowledgements, and retransmission to ensure every byte arrives intact and in order. Common TCP-based protocols include HTTP, HTTPS, SSH, FTP, and SMTP.
Real-World Example
When you load a web page, your browser opens a TCP connection to the server (port 443 for HTTPS). If a packet is lost in transit, TCP automatically retransmits it — ensuring the page loads completely.
Exam Trap — Don't Get Fooled
TCP adds overhead compared to UDP because of its handshake and acknowledgement mechanism. Applications that prioritise speed over reliability (VoIP, DNS) typically use UDP instead.
Related 200-301 Terms
Frequently Asked Questions
What does TCP mean on the 200-301 exam?
TCP is a Layer 4 (Transport layer) protocol that provides reliable, ordered, and error-checked delivery of data between applications. It uses a three-way handshake (SYN, SYN-ACK, ACK) to establish a connection before data transfer. TCP uses sequence numbers, acknowledgements, and retransmission to ensure every byte arrives intact and in order. Common TCP-based protocols include HTTP, HTTPS, SSH, FTP, and SMTP.
How does TCP appear as a trap on the 200-301?
TCP adds overhead compared to UDP because of its handshake and acknowledgement mechanism. Applications that prioritise speed over reliability (VoIP, DNS) typically use UDP instead.
Can you give a real-world example of TCP?
When you load a web page, your browser opens a TCP connection to the server (port 443 for HTTPS). If a packet is lost in transit, TCP automatically retransmits it — ensuring the page loads completely.
How important is TCP on the 200-301 exam?
TCP falls under the Network Fundamentals domain of the 200-301 exam. Understanding it in context with related terms like udp and port-security is essential for answering scenario-based questions correctly.