effective MTU value is still 1492 bytes.
3, check to the end of the device, found that the End-to-end POS interface MTU value of 1492 bytes, PPP in the MRU negotiation, if the MTU values at both ends of the configuration inconsistent, the results of the negotiations will be small MTU value of the end.
Third, the fault handling
On the router, the MTU value of the End-to-end POS interface is modified to 1500 bytes, the interface is restarted, and after the configuration is complete, the MTU va
1: The desktop home does not want to walk the line again. So went to a certain east bought a USB wireless network card. TP's wn725n USB, very small, is about the size of Logitech's superior receiver.
2: Drive can identify itself is not expected, since it is a USB card, insert USB, then LSUSB
See the ID 0bda:8179 of a new line Realtek added
root@debian:/# Lsusb Bus
001 Device 001:id 1d6b:0002 Linux Foundation 2.0 root Hub Bus 002 Device 001:id 1d6b:00
Foundation 3.0 Root Hub bus
003 Device 001:
This article will talk about how users are more concerned about how to achieve the establishment of wireless office network, here we must mention the following: equipment selection, control costs, post maintenance.
1. Equipment selection
The equipment includes the brand, the price, the performance, the localization many factors, here we like everybody Brief introduction. At present, the main wireless router brand has a network, Belkin, D-link, Tp-li
Belkin seem to have not been invited.
2. HomeKit will provide only basic functionality, at least for the time being. At CES, it was also learned from HomeKit developers that HomeKit may be limited to a two-dollar operation. Therefore, you may turn off the lights or turn on the lights, but there is no way to adjust the brightness of the lights. This does not mean, of course, that the HomeKit accessories will not be able to perform more advanced opera
System Preferences, create a new administrator, reboot, and enter the system with the new administrator Note that when I followed law one and two in turn, the WIFI problem was greatly improved. If you have not solved the problem after you have executed the law and law two, then you can try law three and law four.Docking stationThere are several ways to determine if the docking station has quality problems:1. Unable to automatically re-connect after WIFI is broken2. Whether or not the docking s
transmit wireless signals to the desired places.
2.4Ghz or 5Ghz
We can hardly find that many wireless routers are in the 5G band. So what is the wall-crossing Effect of vrouters with 5g frequencies? In fact, 2g is better at penetration than 5g. The advantage of 5g is that the transmission distance is far from 2G and more information can be transmitted. If the space is large, we recommend that you purchase dual-band routers (both 2.4G and 5g ).
Wall M
C # source code of inSSIDer's Powerful wifi wireless hotspot signal scanner,
A complete source code of the wireless signal scanning tool, including drawing from hotspot scanning to intensity and signal transformation curves. The source code is based on Managed Wifi to implement basic functions. Managed Wifi is also an open-source project, which can be found on this site.
Specify the NIC signal scan. You can select the local wireless Nic and then scan all the nearby Wi-Fi hotspots.
Obtain the h
at most 3x3 (three transmit, three receive ). as with 802.11n, there is a relationship between numberOf transmit/receive pairs, number of spatial streams and the maximum data rates supported. since product cost rises with the number of Transmit/receive pairs, three-stream (perhaps four) designs are about the limit of what we see in consumer gear today.
The table below fromBroadcom presentation shows where1.3 GbpsMaximum data rate that the CES product announcements trumpeted comes from. Given th
discussion, 65% of the theoretical value is possible, that is, about 1.15Gbps.
Therefore, assume that:
Only 3x3: 3 client devices, one in the 2.4GHz band and one in the 5GHz band
Excellent RF conditions without interference from neighbors and other RF Frequencies
There are TCP applications that can maintain Mbps
100% upstream or downstream TCP applications
So it may be possible to achieve a gigabit return, at least people argue.
But this will not hap
runtime, it cannot detect intrusion points on other WLAN channels at the same time. It is not enough to rely on a single Wireless Access Point to provide access and security. Network administrators must be able to monitor all WLAN frequency ranges to reliably detect and determine intrusion points.
Wireless Sensing technology provides a way to monitor the RF environment in the 2.4GHz and 5GHz frequencies used by IEEE 802.11 WLAN without interrupting
:· supports monitoring of the entire 2.4GHZ and 5GHZ wireless bands;· to provide a patented maker Packet TM technology for the detection of illegal devices;· 7x24 monitoring of up to 100 VLAN-illegal devices;· provides the most comprehensive protection against all types of wireless security threats, including: Rogue AP access points, Rogue software APs, AD-HOC connections, improperly configured clients, Honeypot attacks, Wi-Fi Dos attacks, mobile hots
can be covered to 6GHz. But the disadvantage of this single-purchase sub-board scenario is that the cost is higher than HACKRF and Bladerf. The Bladerf can support 300MHz to 3.8GHz, and it uses a chip that is lms6002d. This chip offers the most RF functions, including all mixers, ADC,DAC and other features. This chip is similar to the AD9361. However, it can only support up to 3.8GHz. This means that it is impossible to use Bladerf to achieve 802.11n in the
transmitting 256 bytes of data)
79% (TCP packet)
82%
92~94%
Packing efficiency is the ratio of payload length to total package length. Srio supports a variety of efficient package formats.
Serial RapidIO ProtocolFounded in 2000, the RapidIO Industry Association aims to develop reliable, high-performance, packet-switched interconnect technologies for embedded systems. The brief development history of the RapidIO
A complete source code of the wireless signal scanning tool, including drawing from hotspot scanning to intensity and signal transformation curves. The source code is based on managed wifi to implement basic functions. Managed WiFi is also an open-source project, which can be found on this site.Specify the NIC signal scan. You can select the local wireless Nic and then scan all the nearby Wi-Fi hotspots.Obtain the hotspot details, including the hotspot name, signal strength, channel occupation,
router's wireless network name (SSID) and wireless password to select the wireless band that the router is working on, as shown below:
Note : The SSID does not support Chinese, the wireless band can be selected as 2.4GHz or 5GHz, both cannot work simultaneously.
Click Finish , the page prompts to restart the router, as shown below:
Click
OK , wait for the router to reboot complete. After the restart of the
. As follows
Note If the guest address segment address is insufficient, you can shorten other address segments.
AC Function Management wireless AP Third step, configure wireless parameters
Below we only take the 2.4G wireless setup as an example, the actual use of 2.4G and 5G as needed.
Enter the wireless management >> wireless basic settings and modify the default entries in the Wireless networks list as follows
Follow the instructions below to set up an employee ne
Enter the router management interface, the router will automatically detect the inserted SIM card, dialing parameters remain the default, directly click Next.
Note: If the 4G operator has specified dialing parameters, then click New, and fill in the corresponding location parameters respectively.
2. Set Wireless parameters
Set the wireless name and wireless password, the default wireless band is 2.4GHz, set complete click Next.
Note: Wireless bands can only be sel
.
Follow the instructions below to set up an employee network.
Add a student wireless network as follows.
Attention. Students are not allowed to access each other, you can open internal isolation.
After the addition is complete, the list is as follows.
Follow the settings above to set the 5GHz wireless basic settings as well.
tp450g Router set up AC function management AP Fourth step, AP Management
methods for viewing the number of connections by TP router One, traditional interface
Log on to the Router management interface, click Wireless Settings >> host status on the left menu to view the number of wireless terminals connected to this route wireless signal, as shown below:
In the case of a dual-band wireless router, the number of wireless clients needs to be viewed separately from the wireless set 2.4GHz >> host State and wireless settings
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