By default, the OSPF port cost is related to the port bandwidth. The calculation formula is bandwidth-reference/bandwidth. The cost is only calculated by OSPF and cannot be changed manually.

• A.TRUE
• B.FALSE

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What problem does IGMP Snooping mainly solve?

• A.The receiver host only supports the IGMPv2 protocol, but the SSM multicast model is used in the network
• B.IGMP Report message legality issue
• C.There are a large number of receiver hosts on the network segment, and the router will receive a large number of IGMP Report messages.
• D.Solve the problem of multicast data message broadcasting on Layer 2 devices, which is used to manage and control the forwarding of multicast data messages

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The default priority of VRRP devices in the backup group is:

• A.100
• B.150
• C.0
• D.200

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Regarding BGP route announcement, which of the following descriptions is wrong? (Multiple choice)

• A.Only the best route preferred by BGP can be announced to other BGP neighbors
• B.All BGP routes learned from all BGP neighbors are announced to other BGP neighbors.
• C.By default, routes learned from IBGP are not forwarded to other IBGP neighbors
• D.Only routes learned from IGP can be advertised to other BGP neighbors

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What is the sequence of the VLAN Pool assigning VLANs to the terminal? (Multiple choice)

• A.Assign VLAN to the terminal according to the VLAN algorithm
• B.Terminal access to VAP
• C.Determine the VLAN Pool and VLAN algorithm bound to the VAP
• D.The terminal accesses from the divided VLAN

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