單項(xiàng)選擇題

When debugging a routing problem, the time-to-live (TTL) value can be used to determine:（）

A. Number of routes available.
B. Number of router hops.
C. Time that an advertised route is valid.
D. Time to make a round trip.

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單項(xiàng)選擇題

An administrator has found interference on a network. Which of the following cable types is thenetwork MOST likely composed of?（）

A. UTP
B. Fiber
C. RG-6
D. STP

單項(xiàng)選擇題

Which of the following cable types has a MAXIMUM transmission speed of 10Mbps?（）

A. CAT6
B. CAT5
C. Single-mode fiber
D. CAT3