What is Voice Over Internet Protocol (VoIP)?
The correct answer is D: A method of delivering voice communications over the internet using digital techniques. Voice Over Internet Protocol (VoIP) is a method of delivering voice communications over the internet using digital techniques. VoIP converts analog voice signals into digital data packets, transmits them over the internet, and converts them back to voice at the receiving end. For amateur radio operators, VoIP is used in systems like IRLP, EchoLink, and D-STAR to link radio systems over the internet, allowing worldwide communications through local repeaters. Understanding VoIP helps explain how internet-linked repeaters work.
Exam Tip
VoIP = voice over internet. Think 'V'oIP = 'V'oice 'O'ver 'I'nternet 'P'rotocol. Digital method for transmitting voice communications over the internet. Used in IRLP, EchoLink, and other linking systems.
Memory Aid
"VoIP = Voice Over Internet Protocol. Think 'V'oIP = 'V'oice 'O'ver 'I'nternet. Digital method for transmitting voice communications over the internet. Used in linking systems."
Real-World Application
You use EchoLink to connect your local repeater to a repeater in another country. Your voice is converted to digital packets, transmitted over the internet, and converted back to voice at the distant repeater. This is VoIP - it allows you to talk to operators worldwide through internet-linked repeaters, even though you're only transmitting to your local repeater.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. VoIP isn't about identifying stations - it's about transmitting voice over the internet. Station identification is a separate function.
Option B: Incorrect. VoIP isn't for spotting DX stations - that's what DX spotting networks do. VoIP is for voice communications.
Option C: Incorrect. VoIP isn't for measuring modulation quality remotely - that's not its function. VoIP is for voice transmission over the internet.
题目解析
The correct answer is D: A method of delivering voice communications over the internet using digital techniques. Voice Over Internet Protocol (VoIP) is a method of delivering voice communications over the internet using digital techniques. VoIP converts analog voice signals into digital data packets, transmits them over the internet, and converts them back to voice at the receiving end. For amateur radio operators, VoIP is used in systems like IRLP, EchoLink, and D-STAR to link radio systems over the internet, allowing worldwide communications through local repeaters. Understanding VoIP helps explain how internet-linked repeaters work.
考试技巧
VoIP = voice over internet. Think 'V'oIP = 'V'oice 'O'ver 'I'nternet 'P'rotocol. Digital method for transmitting voice communications over the internet. Used in IRLP, EchoLink, and other linking systems.
记忆口诀
VoIP = Voice Over Internet Protocol. Think 'V'oIP = 'V'oice 'O'ver 'I'nternet. Digital method for transmitting voice communications over the internet. Used in linking systems.
实际应用示例
You use EchoLink to connect your local repeater to a repeater in another country. Your voice is converted to digital packets, transmitted over the internet, and converted back to voice at the distant repeater. This is VoIP - it allows you to talk to operators worldwide through internet-linked repeaters, even though you're only transmitting to your local repeater.
错误选项分析
Option A: Incorrect. VoIP isn't about identifying stations - it's about transmitting voice over the internet. Station identification is a separate function. Option B: Incorrect. VoIP isn't for spotting DX stations - that's what DX spotting networks do. VoIP is for voice communications. Option C: Incorrect. VoIP isn't for measuring modulation quality remotely - that's not its function. VoIP is for voice transmission over the internet.
知识点
VoIP, Voice Over Internet Protocol, Internet communications, Digital voice
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.