TCP establishes a connection via the THREE-WAY HANDSHAKE. The sequence of segments is

1. TCP 3-way handshake (RFC 1180 §7): - Client → Server: SYN (with initial sequence number $x$) - Server → Client: SYN+ACK (server's sequence $y$, ack $x+1$) - Client → Server: ACK (ack $y+1$) 2. After this exchange, both sides have agreed on starting sequence numbers and the connection is ESTABLISHED. 3. Option C is the CONNECTION TERMINATION sequence (FIN-based, 4-way close). Option D is the reset/abort sequence. Option B has wrong second step. _Source: RFC 1180 "A TCP/IP Tutorial", §7 (TCP — connection establishment)._