At what layer of the OSI reference model does a router operate? ( )

• A.Application layer
• B.Data link layer
• C.Transport layer
• D.Network layer

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192.168.1.127/25 represents () address ()

• A.Multicast
• B.The internet
• C.Host
• D.broadcast

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On an interface that uses PPP as the data link layer protocol, you can configure a static route by specifying the next hop address or outgoing interface. ()

• A.False
• B.True

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When using the FTP protocol to upgrade the router software, the transmission mode should be selected ()

• A.Stream byte mode
• B.Binary mode
• C.Byte mode
• D.Text mode

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The Backup port in RSIP can replace the failed root port. ()

• A.False
• B.True

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