In the BGP protocol, which of the following BGP attributes can be used to mark routes with certain common characteristics so that other BGP routers can identify them?

• A.Origin
• B.AS-path
• C.Community
• D.MED

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Which of the following descriptions about LSP in IS-IS is wrong?

• A.After setting OL, the LSP will not spread in the network
• B.There are two types of LSPs, namely Level-1 and Level1-2
• C.The role of LSP is to exchange link state information
• D.LSP ID consists of three parts, System ID pseudo-node ID and number after LSP fragmentation

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For link state routing protocols, such as OSPF and IS-IS, using filter-policy to filter routes in the inbound direction can block the transmission of link state information, so that the filtered routes cannot be added to the local routing table.

• A.TRUE
• B.FALSE

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Regarding the description of the VRRP slave device, which is correct? (Multiple choice)

• A.The slave will discard IP packets whose destination MMC address is the virtual MAC address
• B.The slave responds to the IP packet whose destination IP address is the virtual IP address
• C.When receiving a VRRP message with a priority of 0, the Slave will directly switch to the Master
• D.When the slave receives the VRRP message sent by the Master, it can judge whether the status of the Master is normal

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Please pair the following functions with the basic concepts in the VRRP protocol.

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