单选题In JUNOS software， how is route summarization at the L1/L2 border configured？（）A By specifying the area-range statement.B By creating aggregate routes and applying policies.C By specifying the route-summarization statement.D By specifying the area-rang
题目
单选题
In JUNOS software， how is route summarization at the L1/L2 border configured？（）
A
By specifying the area-range statement.
B
By creating aggregate routes and applying policies.
C
By specifying the route-summarization statement.
D
By specifying the area-range restrict statement.