The virtualization of NIC hardware has existed for some time in a variety of forms-well before the introduction of virtual switching.
NIC硬件的虚拟化以各种形式已经存在了一段时间—在虚拟交换机出现之前。
Topics summarized here include point-to-point links, circuit switching, packet switching, virtual circuits, dialup services, and WAN devices.
在这里概述的题目包括点对点链路，电路交换，分组包交换，虚电路，拨号服务，和WAN设备。
You must instead provide your own alternative for node-type switching logic in the class or in virtual overrides.
您必须转而为类中或虚拟重写中的节点类型切换逻辑提供您自己的替代项。
VASP? Virtual Analogue Switching Point?
虚拟相似体切换点?。
VNS? Virtual Network Switching?
虚拟网络切换?。
VNS? Virtual Network Switching?
虚拟网络切换?。
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