单选题A network administrator of a company has many branch locations each using a subnet mask of 255.255.255.224. Which of the following dynamic routing protocols should be used？（）AIPv6BRIPCIGRPDRIPv2
单选题
A network administrator of a company has many branch locations each using a subnet mask of 255.255.255.224. Which of the following dynamic routing protocols should be used？（）
A
IPv6
B
RIP
C
IGRP
D
RIPv2
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单选题An administrator needs a network that can support up to 800 hosts on the same subnet. Which of the following is the MINIMUM subnet mask that should be used？（）A255.0.0.0B255.255.0.0C255.255.252.0D255.255.255.0