How many bits are there in the tag field of MPL S?

• A.8
• B.1
• C.3
• D.20

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A routing tool can define multiple entries.
Which tool will automatically add a deny-any entry at the end of the configuration? (Multiple Choice)

• A.AS-path-filter
• B.Community-tilter
• C.IP-prefix
• D.Route policy

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Which of the following statements about IS-IS (IPv6) are correct? (Multiple questions)

• A.By default, IS-IS enables the multi-topology feature
• B.To support the processing and calculation of IPv6 routing, IS-IS has added TLV 232, 236
• C.In order to support the processing and calculation of IPv6 routing, IS-IS added NLPID in 129TLV
• D.IS-IS works at the data link layer and only needs to add a new TLV to support IPv6

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Which of the following descriptions of the LSA age field are correct? (Multiple choice)

• A.The unit of LSA age is second, the LS age of LSA in LSDB increases with time
• B.If the LS age of an LSA reaches the LS Refresh Time (30min), any router can regenerate an instance of the LSA for this LSA
• C.If the LS age of an LSA reaches the LS Refresh Time (30min), the producer of this LSA needs to regenerate an instance of the LSA
• D.The unit of LSA age is second, the LS age of LSA in LSDB decreases with time

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Which of the following description is true about BGP aggregation?

• A.For IPv6 routes, BGP supports manual aggregation and automatic aggregation.
• B.BGP enables automatic aggregation by default
• C.After the Aggregate ipv4-address mask is configured, only the aggregated routes are advertised and the detailed routes are not advertised.
• D.Manually aggregate routes in the BGP local routing table.

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