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A sustained shortage of truck drivers would certainly underline that particular point . A. Ethernet OAM must provide capabilities on a link level and an end-to-end service level . Consider another scenario where failover occurs to a redundant chassis and now the switch has to relearn all MAC addresses for dual homed hosts . FCSP DH-CHAP provides absolute protection against WWN spoofing on a compromised port , even when physical security of the switch has been compromised and a rogue device has been installed on the same physical switch port as that of the rightful host . Operations like Salary.com and Hire.com figured out how to grow in spite of the circumstances .