Which of the following statements are true about the default route?

• A.The routing table of any router must contain the default route.
• B.The default route can only be manually configured by the administrator.
• C.In a routing table, the route to 0.0.0.0 (with the mask being 0.0.0.0) is the default route.
• D.If the destination address of a packet does not match any entry in the routing table, the packet is forwarded through the default route.

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ADSL data transmission for the uplink in the band is

• A.26 KHZ ~ 256 KHZ
• B.26 KHZ ~ 1104 KHZ
• C.26 KHZ ~ 138 KHZ
• D.26 KHZ ~ 69 KHZ

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In the RSTP protocol, when the root port fails, 0 will he quickly converted to the new root port and immediately enter the forwarding state.

• A.Forwarding port
• B.Edge port
• C.Alternate port
• D.Backup port

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LSDB two router database synchronization, use () messages to describe their LSDB.

• A.LSR
• B.LSU
• C.Hello
• D.DD

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What is the range of VLAN [Ds that users can use?

• A.0-4096
• B.0-4095
• C.1-4096
• D.1-4094

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