[名词解释] 集中式DBS

做为无类路由协议，则必须首先持？（） ["A、VLSM","B、VPLS","C、LDAP","D、VSM"] 分布式DBS OPT是（）的简称 ["准时制生产","企业资源计划","制造资源计划","最优化生产技术"] 作为无类路由协议，则必须首先支持？（） ["A、VLSM","B、VPLS","C、LDAP","D、VSM"] 在路由表中0.0.0.0代表什么意思？（） ["A、静态路由","B、动态路由","C、默认路由","D、RIP路由"] 集中式DBS