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the switches, by sacrificing the number of ports to the switch between the data exchange to provide a bundle of high bandwidth, improve network speed, break through the network bottleneck, and then greatly improve network performance. 3, the port convergence can provide load balancing capacity and system fault tolera
software.For security and management convenience, mainly in order to reduce the damage of the broadcast storm, the large LAN must be a function or geographical factors into a small local area network, which makes VLAN technology in the network to get a large number of applications, and the communication between different VLANs to be routed through the router to complete forwarding, With the increasing exch
, the broadcast packet has little impact , the fast switching function of the two-layer switch, multiple access ports and low modest price provide a perfect Solution. The advantage of the router is that it is rich in interface type, powerful in three layers, powerful in routing, and suitable for large Routing between networks, which has the advantage of choosing the best route, load sharing, link backup a
???)Two-tier switches support physical layer and data link layer protocols, such as Ethernet switchesThe three-tier switch supports physical layer, data link layer and Network layer protocol, such as some switches that lead the way by function. From the layered structure of iso/osi, the switch can be divided into two-layer sw
using routers to achieve access to the network, not only because the number of ports is limited, and the routing speed is slow. This limits the size of the network and the speed of access. Based on this situation, the three-tier switch is applied to life. The three-tier switch is designed for IP, the interface
environment, when the H3C S1024R switch sends data to the server on 17th computers connected to it, a fault occurs. At this time, the traffic is reduced from about 73 Mbits/s to 42.23 Mbits/s, which is different from that of Digital China. The Ping SERVER on all computers is normal, and the nine client computers that transmit files to the server work normally. The connection between the last eight computers and the server's
conf", and the "show configure" command can be abbreviated as "sh conf" and then press enter to execute the command. The preceding describes common configuration commands in command mode. The configuration process is complex and is not described in detail here. Ii. Remote Configuration We have already introduced that in addition to the direct connection between a vswitch and a computer through the Console port, the vswitch can also be connected through the common port of the vswitch. For the st
using the API functions provided by the Windows SDK GetAdaptersInfo () can obtain the network card name of all network cards, network card description, network card MAC address, network card IP, network card
IntroductionTraditional routers have isolated networks, isolated broadcasts, routing and forwarding, and firewall operations in the network, and as the network continues to evolve, the load of routers is growing rapidly. One of the important reasons is that the VLAN (virtual local area network) technology is widely used in networks because of security and managem
How does a multi-layer switch realize interconnection between different network segments ?, Multi-layer switch Lab Name:How does a multi-layer switch implement intercommunication between different network segments? Lab requirements: (1) layer-3 switches are gateways of vlan1
copies of Type instances. VaR ins shaper // correct INS: = shaper (S1) // correct INS: = S1 // Error When the INS cannot be determined to be an interface instance, use it for testing, suchins.(Square)An error will be reported: invalid type assertion:ins.(Square) (non-interface type (type of ins) on left) It indicates
Android.view.view;import Android.view.viewgroup.layoutparams;import android.view.animation.AnimationUtils ; Import Android.widget.imageview;import android.widget.linearlayout;import java.util.list;import Java.util.Timer; Import java.util.timertask;/** * Display AD rotation components * * @author Wangwei_cs */public class Recommendadcomponent {/** * Invalid diagram Slice switching time, if 0 means not automatically switching */public static final int switch_time_invalid = 0; Private Contex
The format is as follows: When the value of an expression is equal to the value of a case statement, all statements underneath it are run until a break is encountered. If the value of any case statement is not equal to the value of the expression, the statement under optional label default is run. (a) in the JDK version after Java 1.7, the type of the expression in the switch in Java can be of
subnet uses a static address and another working subnet uses a lan dhcp server, this type of online parameter switching cannot be performed automatically, because in the working subnet where the DHCP server is installed, the NIC device will first obtain valid Online parameters from the DHCP server. Switch Settings In order to enable the laptop system to automatically
IOS can obtain the network type in four ways, and ios can obtain the network type in four ways. ReachabilityOnly the WIFI and WWAN types can be distinguished, but the 2G and 3G networks cannot be distinguished. There are also some methods on the Internet, but there are bugs. After searching for materials and testing on
Normally, when 3G and WiFi are on, Android uses Wi-Fi by default, but it is not possible to have WiFi everywhere in the real world, so the phone will often automatically switch networks.Sometimes, when the phone starts using WiFi, it will automatically switch from WiFi to 3G network 10-30 minutes after it enters standby.If you write a
The configuration of a vswitch has always been mysterious, not only for general users, but also for the vast majority of network administrators. It is also an important and basic indicator for measuring the level of network management. This is mainly due to two reasons: first, the switches configured by the vast majority of enterprises are non-Network-connected v
significant pressure on the converged switch. In fact, because this kind of network loop is the fault on the data link layer, only involves the source MAC address and the destination MAC address, no matter what type of package the high-level package may cause the broadcast storm. In other words, it was possible to catch all kinds of packets with sniffer. Fault
The port of the core switch is mainly a fiber type, but the price of the switch fibre port is very expensive and requires special attention from the user, while the fibre port of the switch is not stacked and can only be used for cascading purposes. Cascading can use either a normal port or a special mdi-ii port. A pa
Company for business needs, commissioning network Netgear GS728TP Poe switch, Partition VLAN and other services, after all debugging is complete. Again habitually save restart the device. Results after this reboot. The inexplicable wonderful ping does not pass the address of the management switch. Not to mention using a Web interface to manage the
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