alleryStart learning →Which protocol provides RELIABLE, CONNECTION-ORIENTED byte-stream service?
AUDP
BIP
CICMP
DTCP
Answer & Solution
Correct answer: D. TCP
1. TCP provides:
- RELIABLE delivery (lost packets are retransmitted)
- CONNECTION-ORIENTED (3-way handshake establishes a connection)
- ORDERED byte-stream (data arrives in order)
- Flow + congestion control
2. UDP (option A) is UNRELIABLE, CONNECTIONLESS — best for low-latency apps (DNS, VoIP, gaming).
3. IP (option B) is the network layer — best-effort packet delivery, no reliability.
4. ICMP (option C) is for control messages (ping, error notifications).
_Source: RFC 1180 "A TCP/IP Tutorial", §7 (Transmission Control Protocol)._
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