What is the default load-balancing hash mechanism for traffic on FCoE port channels?

You have a Cisco Nexus 5500 Series switch.

What is the default load-balancing hash mechanism for traffic on FCoE port channels?
A . the source MAC address
B . the source IP address and the destination IP address
C . the source MAC address and the destination MAC address
D . the source TCP or UDP port and the destination TCP or UDP port

Answer: B

Explanation:

On Nexus 5500 the default load balancing mechanism on the LACP portchannel for FCoE traffic is "source-destination". In this default state, all the FCoE traffic takes the same link in the port-channel when the Nexus 5500 forwards frames over FCoE VE ports. In order to enable all links to be used in the port-channel for FCoE traffic, enter the port-channel load-balance ethernet source-dest-port command to configure Nexus 5500 "port-channel load balancing" to "source-dest-port". With this configuration "sourcedestination-oxid" load balancing is used for FCoE traffic.