When two routers exchange LSDB information using DD packets, a master/slave relationship is formed first, the router with a larger router ID is the master, and determine the MS bit.

• A.TRUE
• B.FALSE

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

• A.IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.
• B.The source address of a multicast packet is a unicast address.
• C.In multicast transmission, the destination address of a packet can be the unicast address of a host.
• D.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.

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The next hop address of the routing entry in the routing table must be on the same network segment as the address of its directly connected interface.

• A.TRUE
• B.FALSE

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A router performs a lookup in its FIB table for a packet. If the tunnel ID in the matching entry is 0, the packet needs to be forwarded through a tunnel, such as an MPLS tunnel.

• A.TRUE
• B.FALSE

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Regarding the following configuration commands for issuing default routes for each protocol, which of the description is wrong?

• A.In static routing, the ip route- static default preferer command is used to generate a default route on the current router
• B.In the BGP protocol, the default-route imported command is used to enable the function of importing provincial routes into the BGP routing table
• C.In the OSPF protocol, the default-route-advertised command is used to advertise the default routing information to the common OSPF area
• D.In the ISIS protocol, the default-route-advertise command is used to advertise the default routing information to neighbors

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