Replace the Layer 2 switch with a router.
以一个路由器代替层2开关。
Marketing literature may call it a layer 2 switch, but a switch has no precise definition.
营销文学可以称之为第二层交换机，但开关没有确切的定义。
The layer 3 switch technology which fits for the need of aggregation layer is a combination of the layer 2 switch technologies and routing.
三层交换技术将传统的二层转发和路由技术结合起来，特别适合汇聚层的需要。
The present invention relates to a method for protecting a network against a security attack from an user, and in particular, for a layer 2 switch, against a MAC flooding attack.
本发明涉及一种用于保护网络免于来自用户的安全攻击并且尤其是对于第2层交换机而言免于MAC洪流攻击的方法。
But as Linux already incorporates a layer-2 switch within the kernel, some have asked why a virtual switch is even necessary.
但是，因为Linux已经在内核中包含一个2层交换机，所以有人可能会问，为什么会需要虚拟交换机？
For example, if a multilayer switch supports IP, then IPX packets can only be switched at layer 2 not routed at layer 3.
例如，若某台多层交换机支持ip协议，ipx包则只能在第二层上交换，不能在第三层上规定路由。
Which two methods are examples of implementing Layer 2 security on a Cisco switch? Choose two.
用什么办法可以实施思科交换器的二层安全特性？
Which two methods are examples of implementing Layer 2 security on a Cisco switch? Choose two.
用什么办法可以实施思科交换器的二层安全特性？
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