Connection Oriented Network Basics | Generated by AI
Question: The process of making a daily phone call is described as “pick up the phone - dial the number - connect and talk - hang up.” What is the network service called that is similar to this phone call process?
Answer:
The network service similar to the described phone call process is called a Connection-Oriented service (or 面向连接 service in Chinese).
Explanation:
- Analogy to Phone Calls:
- Pick up/Dial (Setup): Just as you must dial a number and wait for the other party to answer before speaking, a connection-oriented service requires a specific phase to establish a logical path between the sender and receiver before any data is transferred. In networking terms, this is often called a “handshake” (e.g., the TCP three-way handshake).
- Talk (Data Transfer): Once the connection is established, data flows sequentially and reliably between the two parties, much like a conversation.
- Hang up (Teardown): After the conversation ends, the line is disconnected. Similarly, a connection-oriented service requires a formal termination phase to release resources and close the connection.
- Key Characteristics:
- Setup Phase: A connection must be established before data transmission.
- Reliability: Data usually arrives in order and without errors (guaranteed delivery).
- Stateful: The network maintains the state of the connection during the session.
- Example: The most common example in the Internet protocol suite is TCP (Transmission Control Protocol).
- Contrast:
- This is opposite to a Connectionless service (like sending a letter or using UDP), where each packet is sent independently without prior setup, and there is no guarantee of order or delivery.
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