單項(xiàng)選擇題

Which of the following is an invalid IPv4 address?（）

A.225.0.0.1
B.254.254.0.0
C.256.0.0.4
D.224.2.1.4

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單項(xiàng)選擇題

An administrator needs to update a router configuration for a router that does not support SSH.Which of the following can be used to securely update the router configuration?（）

A.FTP
B.SNMPv2
C.TFTP
D.KTTPS

單項(xiàng)選擇題

New service from the telephone company is delivered over fiber, but the technician does not have a fiber module for the router. Which of the following would remedy this issue?（）

A. OTDR
B. Media converter
C. CSU/DSU
D. Fiber repeater

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