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單項(xiàng)選擇題

Refer to the exhibit. Which statement is true about the configuration？（）

A.Hosts belonging to DHCP pool 1 and pool 2 will retain their IP settings for 30 hours before theymust renew
B.Hosts will receive IP settings from pool 1 until the addresses run out， and then hosts will receivethe settings from pool 2
C.Hosts in the 10.10.20.0/24 subnet will use 10.10.20.50 as its DNS server
D.DHCP pool 0 needs to have the ip dhcp excluded-address command to exclude the defaultrouter and DNS servers

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