H31-341_V2.5 · Question #962
PWE3, as an end-to-end one-layer service bearing technology, provides a point-to-point L2vP service in the public network, and transmits various services (such as Ethernet and TDM services) through…
The correct answer is A. True. Option A is correct because the statement accurately describes PWE3 (Pseudowire Emulation Edge-to-Edge) in all its key aspects: it is indeed a single-layer, end-to-end emulation technology that creates point-to-point Layer 2 VPN connections across a Packet Switched Network…
Question
PWE3, as an end-to-end one-layer service bearing technology, provides a point-to-point L2vP service in the public network, and transmits various services (such as Ethernet and TDM services) through the packet switching network (PSN). Provides end-to-end virtual link emulation at the border of the PSN network.
Options
- ATrue
- BFalse
How the community answered
(39 responses)- A79% (31)
- B21% (8)
Explanation
Option A is correct because the statement accurately describes PWE3 (Pseudowire Emulation Edge-to-Edge) in all its key aspects: it is indeed a single-layer, end-to-end emulation technology that creates point-to-point Layer 2 VPN connections across a Packet Switched Network (PSN), and it supports heterogeneous payload types including Ethernet, TDM, ATM, and Frame Relay.
Option B is wrong because every clause in the statement is technically accurate - PWE3 is standardized (RFC 3985) precisely to do what the question describes: tunnel legacy circuit-based services transparently across modern packet networks by emulating the behavior of a dedicated wire at the PSN edge.
Memory tip: Break down the acronym - PWE3 = Pseudowire Emulation Edge-to-Edge. The "Edge-to-Edge" tells you it operates at the PSN border (PE routers), the "Emulation" tells you it fakes a physical link, and "Pseudowire" tells you it's a virtual point-to-point L2 tunnel - which maps directly onto every element of this statement.
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