Which of the following log levels are available in the USG series firewalls? (Multiple choice)

• A.Informational
• B.Alert
• C.Emergency
• D.Error
• E.Event
• F.Monitoring

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Which of the following statements about multicast packet forwarding is true?

• A.If a multicast data packet fails the RPF check, the packet must have been received through a sub- optimal interface. However, this interface still receives and forwards the multicast traffic downstream.
• B.IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.
• C.The source address of a multicast packet is a unicast address.
• D.In multicast transmission, the destination address of a packet can be the unicast address of a host.

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By default, OSPF external routes belong to which of the following types?

• A.Type 1
• B.Type 5
• C.Type 2
• D.OSPF will calculate the most suitable external route type, so there is no default situation

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Regarding the range of BGP AS numbers, which of the following descriptions are incorrect? (Multiple choice)

• A.When 2-byte AS is supported, the value range of the private AS number is 32768-65535
• B.When 4-byte AS is supported, no new attributes need to be defined
• C.When supporting 2-byte AS, the value range is 0-65535
• D.When 2-byte AS is supported, the value range of the private AS number is 64512-65535

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When deploying BFD, you need to adjust some parameters so that it can better detect the network status.
Which of the following statements isfalseabout BFD optimization?

• A.After a high priority is configured for BFD packets, BFD packets are preferentially forwarded.
• B.To quickly learn about the network status and performance requirements, you can set the interval for sending BFD packets to the minimum value.
• C.On a live network, some devices switch traffic only when a BFD session changes to the Up state. If a routing protocol goes Up later than an interface, no route is available for switching traffic back, leading to traffic loss. To resolve this issue, configure a delay to compensate for the time difference caused when the routing protocol goes Up later than the interface.
• D.If a BFD session flaps, master/backup switchovers are frequently performed on the application associated with the BFD session. To prevent this, set the WTR time of the BFD session.

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