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單項選擇題

You are about to design a very fast convergence time on a service provider network. Which feature wouldyou utilize to declare a link failure within less than two seconds of the fault on a link？（）

A.fast convergence SFP
B.MTU discovery
C.redundancy links
D.keepalive
E.carrier delay

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多項選擇題

Which three of these can be a forwarding equivalence class？（）

A.IPsec tunnel
B.routing equivalence paths
C.traffic engineering tunnel
D.bridge or switch instance
E.groups of IP addresses

單項選擇題

How many bits does EXP occupy in the MPLS label header？（）

A.8
B.4
C.3
D.1
E.2