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What are the wireless connection technologies of the... Internet of things (iot) applications have been deeply rooted in our lives. The E-Lins H685 industrial-grade router is a small industrial-grade wireless router with single or double LAN ports. TDD/ fdd-lte, 4G, 3G, GPRS network optional. Besides, what are the wireless connectivity technologies for the Internet of things?   1....

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The use of industrial wireless routers Industrial-grade wireless router adopts high performance 32-bit industrial-grade ARM9 communication processor, which is widely used in finance, electric power, postal, water conservancy, environmental protection, meteorology and other industries.   Industrial router is mainly used in intelligent transportation,...

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Cascade and stack of industrial-grade 4G routers The most basic star Ethernet architecture, the actual star enterprise network may be much more complex than this. This renaturation is not only reflected in how high-end network equipment, how complex configuration, more importantly, the performance of network switching level is more complex. Industrial routers and firewalls...

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The difference between 4G router and 4G DTU 4G industrial wireless router and 4G DTU are also used for wireless network data transmission of industrial equipment. But there are also significant differences between the two, and the differences between the two are mainly from the appearance of the interface, the use of methods and the application environment.   1....

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Characteristics and differences between RS485 and RS232 RS232 and RS485 have always been the weak current common interface, but there are a lot of people do not understand the difference between them is not very thorough.   I. overview of RS485   RS-485 serial bus is widely used when the communication distance is tens of meters to thousands of meters. RS-485...

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工业路由器防火墙的局限性和什么是物理隔离

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  防火墙的局限性。4g路由器

  (1)防火墙只能防范经过全网通工业级路由器防火墙的攻击。没有经过全网通工业路由器防火墙的数据,防火墙不能检查。

  (2)防火墙防外不防内。

  (3)防火墙由于在配置和管理上比较复杂,所以容易造成全网工业路由器安全漏洞。

  (4)防火墙无法防范病毒,抵御数据驱动式的攻击。

  (5)防火墙不能防止利用标准网络协议中的缺陷以及服务器系统的漏洞进行的攻击。

  (6)防火墙不能防止全网工业级路由器本身的安全漏洞的威胁。

  4g无线路由器:什么是物理隔离。中国电子政务网之间与外网之间是什么关系。全网路由器物理隔离是指内外网络在物理上是完全独立、断开的,没有任何物理连接,但在逻辑上则保持连接,能够进行适度的数据交换。关系:电子政务内网和电子政务外网之间是物理隔离,电子政务外网与公网之间是逻辑隔离。物理隔离的原理1正常情况下,全网通路由器隔离设备和外网、隔离设备和内网、外网和内网之间是完全断开的。隔离设备可以理解为纯粹的存储介质和一个单纯的物理隔离控制设备。2当外网需要有数据到达内网的时候,以电子邮件为例,外部的服务器立即发起对工业4G路由器隔离设备的非TCP/IP的数据连接,隔离设备将所有的协议剥离,将原始的数据写入存储介质。根据不同的应用,可能有必要对数据进行完整性和安全性检查,如防病毒和恶意代码等。3一旦数据完全写入隔离设备的存储设备,隔离控制设备立即中断与外网的连接。转而发起对工业级4G路由器内网的非TCP的数据连接。隔离设备将存储设备内的数据推向内网。内网收到数据后,立即进行TCP/IP的封装和应用协议的封装,并交给应用系统。在工业路由器隔离控制设备收到数据传输结束的消息后,隔离设备立即切断隔离设备与内网的直接连接。这时整个网络又重新恢复到完全隔离状态。4如果这时内网有电子邮件要发出,隔离控制设备收到内网建立过接的请求后,建立与工业级路由器内网之间的非TCP/IP的数据连接。隔离设备剥离所有的TCP/IP和应用协议,得到原始的数据,将数据写入隔离设备的存储介质。如果有必要,就对其进行防病毒处理和防恶意代码检查,然后中断与双卡路由器内网的直接连接。

  标签:无线路由器   4g无线路由器

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