多項(xiàng)選擇題A national retail chain needs to design an IP addressing scheme to support a nationwide network. The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet. Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme? ()

A.255.255.255.0
B.255.255.255.128
C.255.255.252.0
D.255.255.255.224
E.255.255.255.192
F.255.255.248.0


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2.單項(xiàng)選擇題IP地址中,網(wǎng)絡(luò)部分全0表示()。

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3.單項(xiàng)選擇題On point-to-point networks, OSPF hello packets are addressed to which address()。

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