[名词解释] 专家系统

VLAN Tagging, also known as Frame Tagging, is a method developed by Cisco to help identify packets travelling through trunk links. When an Ethernet frame traverses a trunk link, a special VLAN tag is added to the frame and sent across the trunk link .How does ERS use the VLAN tag?（） [" provide service internetworking"," support transparency for Layer 2 frames"," indicate destination as a connection identifier"," map to the DLCI in service internetworking"] 现代管理会计的特征在于以预测决策会计和责任会计为主，以规划控制会计为辅。 什么叫电阻？ 降低酌量性固定成本，可以从提高产品产量着手；降低约束性固定成本，可以从减少其绝对额着手。 创新教育的关键在于培养学生的（）。 ["创新能力","创新性学习","创新思维","创新技术"] 专家系统