cobo switches

switches, a simple QoS guarantee, peace mechanism, support network management strategy, spanning tree peace talks and VLANs are necessarily not less function, but if careful analysis, in the superficial appearance can also be some of the function of further subdivision, And these subdivision function is to incur the product difference The primary reason, is also the performance product value added main way. Use-level QoS guarantee in order to provid

Cisco PT Simulation Experiment (5) port aggregation configuration for switchesExperimental Purpose :Understanding Port Aggregation FundamentalsMaster the configuration method of general switch port aggregationExperimental Background : The company's finance department and the sales department of the PC through 2 switches to communicate frequently, in order to improve the bandwidth between links, to ensure the reliability of network communications, whil

The Storage Area Network (SAN) is called the "second network", after years of development, the second network has evolved from a "two-tier" network into a "three-tier" network. An isolated two-layer network The storage Area network is a proprietary network designed specifically for large-scale data transfer, which uses Fibre Channel protocols to connect disk arrays, libraries, and associated servers through Fibre Channel hubs and switches, creating

how Cisco switches Find loops and workaroundsHow can I intuitively and quickly determine if a Cisco switch has a loop? and quickly locate the switch loop location? This becomes a problem?Loop view there is currently no best way to visually view only through some information. There are many prevention loop commands in the Cisco environment in addition to spanning trees. The loop generates a broadcast storm that can seriously cause contact blocking, the

generated: switch from kernel mode to user mode.3. The system call write () produces a context switch: switch from user mode to kernel mode, and then read step 2 to the data copy of user buffer to kernel buffer (the 2nd copy of the data to kernel buffer), but this time A different kernel buffer, this buffer is associated with the socket.4. The system calls write () to return a context switch: switch from kernel mode to user mode, and then DMA copies data from kernel buffer to the protocol stack

What is context switchingContext switching (context-switching) is the process of storing and recovering CPU state, which enables thread execution to resume execution from a breakpoint.The basic characteristics of multi-task operating system and multi-threaded environment during context switching.Even a single-core CPU supports multithreaded execution of code, and the CPU implements this mechanism by allocating CPU time slices to each thread. The time slice is the time the CPU allocates to each t

"Introduction" Within a switched network, it is possible to segment and organize flexibly through VLANs. VLANs can group devices in a LAN. A group of devices in a VLAN communicates as if it were connected to the same line. VLANs are based on logical connections, not physical connections. Types of VLANsThere are many different types of VLANs used in modern networks. Some VLAN types are defined by traffic category. Some other VLAN types are defined by specific features.Data VLAN: used to deliver u

many parameters and switch options when compiling Visual C # program code into IL files. The correct understanding and application of these parameters and switches can sometimes solve seemingly intractable problems. Here is a table to outline the specific functions of these parameters and switches. These parameters and switch options are sorted alphabetically. Which with "*", is a number of commonly used p

exchange has stepped up a new step, and has laid the foundation for the opening of the non-speech business and the realization of the integrated service digital Exchange, which has become the main development direction of the exchange technology, with the rapid development of The superiority of the program-controlled digital exchange is becoming more and more obvious. At present, the production of the large capacity of the program-controlled switches

The management of the equipment is the basic condition for maintaining the normal operation of the equipment, so let's take a look at some basic management commands and methods of Cisco routers and switches. The methods and commands for managing routers and switches are mainly divided into several areas: 1, understand the command line mode. 2, configure the IP address of the interface and related routing

A prefecture-level government generally uses two networks to build an office network and a network of public services. Port network can be used hammer series of switches to form a office network, the whole network has the following three major features: Million trillion core The equipment of the core layer of the office network needs to adopt large capacity and intelligent multilayer switching features. According to the development of network techno

With the popularization and deepening of the network application, the requirement of the two-layer switch is not only limited to the data forwarding performance, service quality (QoS) and so on, the network security idea is becoming the important reference content of the group network product selection. How to filter the user's communication and ensure the safe and effective data forwarding? How to prevent illegal users, protect the network security application? How to carry out security manage

As an indispensable device in networking, core switches are gradually improving their functions to meet more user needs. The simplest LAN is usually composed of a hub (or switch) and several computers. As the number of computers increases and the network size expands, in more and more LAN environments, core switches replace hubs, and multiple switches replace sin

numbers over port 1024. You can find the latest list of allocated port Numbers on RFc1700 "Assigned Numbers. The additional information provided by the TCP/UDP port number can be used by the network switch, which is the basis for layer-3 switching. With the development of the communication industry and the advancement of information technology in the national economy, the Ethernet switch market has steadily increased. Ethernet features high performance, high flexibility, relatively simple, and

With the development of the communication industry and the advancement of information technology in the national economy, the Ethernet switch market has steadily increased. Ethernet features high performance, high flexibility, relatively simple, and easy to implement. Therefore, Ethernet technology has become the most important LAN networking technology today, and Ethernet switches have become the most popular swi