As shown in the figure, if host A has the ARP cache of host B, host A can ping host B.

• A.True
• B.False

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The subnet mask of a network segment 150.25.0.O is 255.255.224.0, then what is a valid host address in the network segment?

• A.150.25.0.0
• B.150.25.1.255
• C.150.25.2.24
• D.150.15.3.30

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The network administrator configures the Huawei router RTA as shown in the figure. If a user needs to be authenticated in the authentication domain "huawei", the correct description below is ().
[RTA]aaa
[RTA-aaa]domain Huawei
RTA-aaa-domain-huawei]authentication-s cheme aul
[RTA-aaa-domain-huawei]authentication-scheme au2

• A."authentication-scheme aul" authentication will be used, if "au1" is deleted, "au2" authentication will be used
• B.Will use "au2" authentication and will use "authentication-scheme au1" authentication
• C."authentication-scheme au2" authentication will be used, if "au2" is registered, "aul" authentication will be used
• D.Will use "authentication-scheme au2" authentication

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If the network address of a network is 192.168.1.0, then its broadcast address must be 192.168.1.255.

• A.False
• B.True

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When two OSPF routers form a 2-WAY neighbor relationship, the LSDB has been synchronized.

• A.True
• B.False

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