Free Cisco 400-007 Actual Exam Questions - Question 3 Discussion

Makes sense to rule out A and C since they’re more about physical or traditional transport, not Ethernet losslessness. I’d say D is less likely because while it bundles links, it doesn’t inherently provide Data Center Bridging features needed for FCoE. So sticking with B and E feels right because both extend Ethernet and can support lossless behavior, which is critical for FCoE in a DCI setup.

I’m going with B and E too, but from a different angle. The key is maintaining lossless Ethernet, and both EoMPLS (B) and VPLS (E) can extend Ethernet while supporting Data Center Bridging features required for FCoE. DWDM doesn’t handle Ethernet losslessness since it’s just the optical transport layer, and Multichassis EtherChannel (D) mainly aggregates links but doesn’t guarantee lossless across the DCI. SONET/SDH (C) isn’t Ethernet-based, so less relevant here. So B and E make the most sense for lossless Ethernet over the DCI.

C imo, SONET/SDH is more about guaranteed bandwidth and low latency, which fits synchronous replication needs, even if it’s not Ethernet-based. For the second one, DWDM (A) might not do lossless Ethernet itself but combined with proper DCB, it can carry FCoE traffic over long distances. So I’d say A and C work together for this use case.

It’s B and E for me. EoMPLS (B) can encapsulate Ethernet frames over MPLS, helping to maintain lossless conditions needed for FCoE, and VPLS (E) creates a multipoint Ethernet VPN that supports the necessary Data Center Bridging features. The other options like DWDM or SONET/SDH are more about physical transport layers, not specifically about lossless Ethernet or DCB. Multichassis EtherChannel is good for redundancy but doesn’t inherently provide the full DCB needed for FCoE over a DCI.

It’s D and E because Multichassis EtherChannel handles link redundancy and lossless behavior, while VPLS extends Ethernet over MPLS with support for data center bridging features required by FCoE.

D and E. Multichassis EtherChannel (D) can provide a lossless link aggregation setup, and VPLS (E) extends Ethernet over MPLS, which can support DCB features needed for FCoE over DCI.

Maybe A and E since DWDM supports high bandwidth and VPLS can extend Ethernet domains.

It’s B and D for me. B supports MPLS-based Ethernet transport with some QoS, and D uses multichassis EtherChannel which can maintain lossless links, key for FCoE’s needs over a DCI.

I’m thinking E and B are less about lossless Ethernet. D definitely fits since it supports multichassis setups with lossless links. A is just transport, doesn’t handle Ethernet losslessness. So D plus B sounds right to me. D, B

B, D. DWDM is just the optical transport and doesn’t ensure lossless Ethernet, so A feels out. EoMPLS (B) can carry Ethernet frames with some QoS controls, which helps with lossless behavior needed for FCoE. Multichassis EtherChannel over Pseudowire (D) is designed to extend Ethernet features like DCB across a WAN, which fits the requirement for lossless Ethernet too. So B and D both provide ways to maintain Ethernet characteristics over longer distances, unlike the others here.

B tbh, E is out since VPLS doesn’t guarantee lossless Ethernet—it’s more for Layer 2 VPNs. A also seems off because DWDM is just the physical layer, doesn’t handle lossless Ethernet itself. D makes sense since Multichassis EtherChannel over Pseudowire can provide that kind of Ethernet link aggregation and lossless behavior needed for FCoE. I’d pick B and D because EoMPLS can help carry Ethernet frames with some QoS controls, though it’s not perfect for DCB but closer than the others.

Maybe D and A, since DWDM handles the physical layer and D supports lossless Ethernet features.

Maybe D and A, since DWDM handles the physical layer and D supports lossless Ethernet features.

Maybe B and E