Which segment protocol provides fast and predictable convergence (typically within 50 ms) in Layer 2

Which segment protocol provides fast and predictable convergence (typically within 50 ms) in
Layer 2 Ethernet ring topologies?

A.
Spanning Tree Protocol

B.
Flex Links

C.
Resilient Ethernet Protocol

D.
Spatial Reuse Protocol

E.
Resilient Packet Ring

Explanation:
http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_40_se/configurat
ion/guide/swrep.html
Resilient Ethernet Protocol (REP) on the Cisco ME 3400E Ethernet Access switch. REP is a Cisco
proprietary protocol that provides an alternative to Spanning Tree Protocol (STP) to control

network loops, handle link failures, and improve convergence time. REP controls a group of ports
connected in a segment, ensures that the segment does not create any bridging loops, and
responds to link failures within the segment. REP provides a basis for constructing more complex
networks and supports VLAN load balancing.