单项选择题
What is the default value of the IS-IS lsp-refresh-interval command?（）
A. 60 seconds B. 5 minutes C. 15 minutes D. 30 minutes
单项选择题 Which configuration command configures IS-IS to support MPLS Traffic Engineering?（）
单项选择题 Which CLI command displays the LSPs that currently have the attached bit set?（）
单项选择题 By default, an L1/L2 IS-IS router advertises what remote area routes into a Level 1 area?（）
