Select the three best answers which best describe Private Network-to Network Interface (PNNI) in an ATM network.()
A. It is the Routing protocol used between ATM switches
B. PNNI uses the same Dijsktra algorithm for SPF calculation
C. PNNI and OSPF use the same Database to make cohesive decision for packet forwarding
D. PNNI measures line capacities and delays in addition to simple cost metric
查看答案
自然铜的主要成分是()
A. 硫化汞
B. 二硫化二砷
C. 二硫化铁
D. 三氧化二铁
E. 三氧化二砷
以下属于我国第一部古典散文集的是()。
A. 《史记》
B. 《汉书》
C. 《诗经》
D. 《尚书》