H19-410_V1.0 · Question #128
What are the service interfaces that can currently transmit the 1588V2 protocol? (Multiple Choice)
The correct answer is A. GE B. 10GE. GE and 10GE are correct because IEEE 1588v2 (Precision Time Protocol / PTP) is a packet-based timing protocol - it carries timestamps inside Ethernet frames and requires packet-switched network interfaces to function. Both GE and 10GE are Ethernet interfaces that natively…
Question
What are the service interfaces that can currently transmit the 1588V2 protocol? (Multiple Choice)
Options
- AGE
- B10GE
- CSTM-16
- DSTM-64
How the community answered
(48 responses)- A71% (34)
- C10% (5)
- D19% (9)
Explanation
GE and 10GE are correct because IEEE 1588v2 (Precision Time Protocol / PTP) is a packet-based timing protocol - it carries timestamps inside Ethernet frames and requires packet-switched network interfaces to function. Both GE and 10GE are Ethernet interfaces that natively support packet transport, making them compatible with 1588v2.
STM-16 and STM-64 are incorrect because they are SDH/SONET interfaces - circuit-based, TDM (Time Division Multiplexed) technologies. These interfaces use rigid, time-slotted framing rather than packets, so they cannot natively carry the Ethernet frames that 1588v2 depends on. They belong to a different layer of the transport hierarchy entirely.
Memory tip: Think "PTP = Packet Timing Protocol." If the interface isn't packet-based (i.e., Ethernet), it can't carry 1588v2. GE and 10GE have "E" for Ethernet; STM stands for Synchronous Transport Module - synchronous and TDM, not packet. When you see STM on the exam, think TDM, not PTP.
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