We study the potential results of attacking methods exploiting layer-2 and layer-3 vulnerabilities composedly.
研究了综合利用二层三层网络弱点可以达到的破坏作用。
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？
Emergents, which do not form a continuous layer, are usually the giants of the forest, reaching heights of 35 to 70 m or more, and trunk sizes of over 2 m in diameter.
不形成连续层的新生植物通常是森林中的巨人，高度可达35至70米或更高，树干直径超过2米。
This layer integrates primarily layers 2 through 4, making it crucial to an SOA.
此层主要集成了2到4层，因而对soa来说至关重要。
Layer 2: Enterprise components layer.
层2：企业组件层。
Drill past 3, 000 metres of rock and you will hit a layer of salt 2, 140m thick.
钻探头穿过3000米厚的岩层将会触碰到2140米厚的盐层。
The helper classes provide database and presentation layer supporting classes (see Figure 2).
helper类提供数据库和表示层支持类（请参见图2）。
The corresponding general issue in Figure 2 is "Overall layer organization?"
这对应到图2中的通用问题就是“整体的层次间组织结构？”
Because RPR is a layer 2 MAC-based technology, it can operate over multiple physical layers, including SONET.
由于RPR是第二层基于MAC的技术，所以它能在多个物理层上工作，包括SONET。
Core layer scenario 2: policies and procedures.
核心层方案2：策略和过程。
Table 2: Business Layer (Partial Sample).
表2：业务层(部分示例)。
Companies traditionally have gained basic resiliency for their metropolitan Ethernet networks through a Layer 2 mechanism such as Spanning Tree or Layer 3 routing protocols.
传统上，各个公司是通过第二层机制(如生成树)或第三层路由协议，获得城域以太网的基本弹性。
It also covers Layer 2 overhead for packets matching defined traffic classes or the class-default class.
它也包括第二层数据包包头匹配定义的话务类别或class-default类（class）。
Note: With both commands, the KBPS value should take the Layer 2 overhead into account.
注意：用两个命令，kbps值会计算在二层报头上。
Layer 2 bridging is prohibited between the AP adapter and any other adapters in the system. The same restriction applies to the VSTA adapter when it is present in the system.
在系统中，不允许在AP网卡和其他网卡之间建立二层桥接，这一限制对系统中的VSTA网卡同样适用。
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。
System generally adopts double redundancy mode, divided into ZhanJi spacing layer and layer 2.
系统一般采用双机冗余模式，分为站级层和间隔层2层。
The McDonald's may be bigger, upstairs there is a layer 2 balconies, can accommodate nearly 800 individual meals.
这家麦当劳可大了，楼上2层还有一个露台，可容近800个人用餐。
The six Mitsubishi lifts, a fire lift, direct access to underground layer 2 to 24 floors on the ground, with the perfect combination of quality in Colleges and universities.
六部三菱电梯，一部消防电梯，直达地下2层至地上24层，品质与高校完美组合。
In the Layer 2 header, there is no Time To Live (TTL) value.
在第2层的表头里并没有存活时间(ttl)的设定值。
Replace the Layer 2 switch with a router.
以一个路由器代替层2开关。
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。
In this paper, a new cluster management system is described by proposing a new protocol, with this protocol layer 2 and layer 3 switches can be managed in a cluster system seamlessly.
本文以协议的形式提出了一种新的以太网交换机集群管理方案，将二层交换机和三层交换机的集群管理无缝地结合在一起。
The energy barrier formed between the organic compound layer (1) (102) and the organic compound layer (2) (103) thus can be lowered.
于是就能够降低形成在有机化合物层(1)(102)与有机化合物层(2)(103)之间的能量势垒。
What is the most common Layer 2 device?
最常用的2层设备是什么？
These switches, however, will cost more than Layer 2 switches.
但这些交换机要比第2层交换机贵。
These switches, however, will cost more than Layer 2 switches.
但这些交换机要比第2层交换机贵。
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