All routers in a network run IS-IS, and all are in Area 49.0001, where the L SDB of R1 is shown in the figure
According to this, it is judged that the DIS of Level-2 is. (Please fill in the device name, such as R1)

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DatabaseinformationforISIS (1)
Level-1Link State Database
LSPIDO Seq Num ChecksumbHoldtime Length ATT/P/OL
0001.0000.4004.00-00 0x00000008 0xb701 1186 68 0/0/0
0001.0000.2002.00-00Ox 0000008 0xb701 1186680/0/0
0001.0100.1001.00-00*0x00000050x2f9d1187 680/0/0
0001.0100.1001.01-00*0x00000001 0xa79e1110550/0/0
Level-2 Link State Database
LSPIDAN> Seq Num Checksum., Holdtime Length ATT/P/OL
0001.00002002.00-00 0000000080xb7011188 6S0/0/0
0001.0100.1001.00-00* 0x00000060x2d9e 1187 680/0/0
0001.0100.1001.01-00* 0x00000005OxdObO 1191 660/0/0
0100.0000.3003.00-00 000000005 0xfe53 1185 560/0/0
0
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