Cisco Meraki local management interface firmware Installation Vulnerability (CVE-2014-7999)
Release date:Updated on:
Affected Systems:Cisco MerakiDescription:CVE (CAN) ID: CVE-2014-7999
Cisco Meraki is a cloud management solution.
A security vulnerability exists in the local management interface of the Cisco Meraki device. authenticated remote attackers can e
Eliminate misunderstanding: the more wireless route antennas, the better the signal? (1)
A strange consumption habit exists in the daily consumption behaviors of most consumers. when the price is almost the same, consumers prefer products with a "large quantity. In addition, the phenomenon of follow-up is also very serious. Many facts did not go to the research, and they took the plunge. "I will buy more products if I buy more products ". Fans of the
Multi-frequency and ultra-Broadband Antennas must not be underestimated in LTE deployment
According to the latest GSA (Global mobile Suppliers Association) statistics, operators in 112 countries around the world have commercialized 331 LTE Networks. It is estimated that by the end of 2014, the number of Global LTE commercial networks will reach 350. With the arrival of the world's LTE construction wave, domestic operators have also accelerated the p
In the cellular mobile communication system, the antenna is the converter of the circuit signal and the space radiation electromagnetic wave, and is the key component of the mobile communication system.From 2G to 4G, the mobile base station antenna has undergone omnidirectional antenna, directional single-polarized antenna, directional dual-polarized antenna, electrically modulated single-polarized antenna, electrically modulated dual-polarized antenna, dual-frequency electrically modulated dual
), and then merge with the adder. Smart Antennas with such structures can only process airspace, while smart antennas with airspace and time domain processing capabilities are more complex in structure, each antenna is followed by a delay-directed weighted network structure, which is the same as that of the Time-city FIR balancer ). Adaptive or intelligent means that these weighting coefficients can be adju
Design and simulate Wireless LAN device antennas
[Date:]
Source: /21IC Author: How Siang Yap and Bart Van Hecke of Agilent EEsof EDA Department
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By adopting polarization diversity technology, low-cost PCB substrates can be used to create Wireless LAN equipment (WLAN) antennas with good receiver performance. This article will describe how to use the late
This is for the only free mini PCI-E slot models, such models are also more common, especially in some international brands of models. With the mini pci-e slot, according to the method of the previous period to add 3G network card and mobile card slots, this time only need to install 3G antenna is done.
Buy Antennas as needed
The price of the notebook antenna is very cheap, the general double price will not exceed 10 yuan, everyone on Taobao using "
This article only applies to tl-wa5210g, tl-wa7210n, tl-wa7510n.
Our outdoor high power AP Built-in vertical and horizontal two antennas, you can use the environment and installation methods to adjust the type of antenna. In the wireless AP management interface, click
Wireless Settings
>>
Wireless Advanced Settings , you can set the antenna type, the following figure:
As different types of
is the truth? As the salesman introduced it, does the wireless coverage have anything to do with the number of antennas? Let's find out the answer with a comparison of two of the top wireless routers that also carry 4 antennas: Asus RT-AC87U and a brand router at the same level to spread the signal coverage.
Signal contrast measurement of the same number of antenna routers
The test will be in the Zol 7-s
1. The first step is to press the power button first, waiting for the lost network to start.
2. Then click the start and stop keys to set the range of S11 measurement frequency.
3. Next work when the loss of the network is more accurate, click
The following is a small series for everyone to collect the "No line by the knowledge misunderstanding" all content, if you like small series of recommendations, please continue to pay attention to learning.
More antennas, better routing?
"The more the antenna coverage, the more the antenna more signal stronger, in short, the more the antenna routing is better"-feel very "common sense" friends can continue to look down the body. For you to understa
First of all, a misunderstanding is: the more the antenna coverage, the more the antenna signal stronger
MIMO (Multiple-entry) is the technology of multiple antennas is from the 802.11N protocol only after the 802.11a,b,g have not. That is to say, the first generation of routers (802.11n ago) will never have more than one antenna. And you bought a new 3-day line to support 802.11AC (the latest protocol) of the router, if your device is an old product
, the entire system is typically a wireless system, such as the Code division used in multiple antenna systems, 3G mobile phone systems (wireless systems) multiple Access (CDMA) systems, even DSL systems (wired systems) that generate crosstalk (crosstalk) using multiple phone lines.
This paper will first introduce the history background and operation of MIMO, and discuss the extent to which MIMO can extend WLAN transmission range.
The development process of MIMO 20 years
The origin of MIMO in
data connection Performance drops.
The beauty of modern Wi-Fi devices is that they can be used together, so you can build networks with the best devices of the same type. For example, my network uses routers from one manufacturer, antennas from another manufacturer, printing services from a third manufacturer, and wireless customer devices from several different companies. You can think of it as a wireless United Nations: global cooperation makes you
MIMO technology can be used as a bridge to connect old and new wireless technologies, so that the two can develop and integrate harmoniously. So it is already an important technology in the next generation of wireless broadband mobile communication systems. The following will give you an in-depth analysis of its development.
MIMO technology has become one of the key technologies in the wireless communication field. However, it is a huge challenge in the industry to reduce the algorithm complexit
into different areas of the class so that everyone can feel warm.
Therefore, the size of the micro base station is much smaller than that of the macro base station, and the power consumption is also reduced.
You may want to ask, why are the antennas of macro base stations so large and the antennas of micro base stations so small? Or, why do we have to use long antennas
.
Therefore, I prefer to purchase a Mbit/s router or a Mbit/s router. After all, the network device update iteration is slow and a vro takes a long time to use, it is necessary to leave room for network bandwidth upgrade in the future. Of course, for users with simple network needs, a low-price M router is also a good choice, and there is no best product in the world, if you make the best of your resources, you are the best choice. blindly pursuing performance leads to performance redundancy, wh
) below:
Figure 1 Cisco Discovery Protocol
Run the "show CDP neighbors" command to display the table of connected devices. Run "show CDP neighbors details" to expand the table and view the detailed connection information between vswitches (a VLAN matching error exists, right ?), And the detailed information of each device, including its management IP address information.
Figure 2
Now everything goes well, right? But what happens when a Cisco switch connects to another vendor's hardware and
With the development of global 4G networks in full swing in recent years, how to simplify the deployment of remote adjustment antennas and improve their reliability has become a new concern of operators for the antenna feed system. Due to its inherent requirements for on-site access, low operation and maintenance efficiency, and affected antenna radiation performance, the method of mechanical tilting optimization
An antenna (antenna) is a transducer that transforms a traveling wave propagating on a transmission line into an electromagnetic wave propagating in a unbounded medium (usually a free space), or in reverse. A component used in radio equipment to transmit or receive electromagnetic waves. Radio communications, radio, television, radar, navigation, electronic confrontation, remote sensing, radio astronomy and other engineering systems, all the use of electromagnetic waves to transmit information,
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