About Stephanie.Li

I am now working in FS.COM, a company specialized in optical communication. we can provide a lots of solutions about optical fiber networking.

How Much Do You Know about Ethernet Switches?

Today, all plants are virtually networked via Ethernet. High requirements are placed on the network infrastructure and network components. Ethernet switches are the integral piece of IT infrastructure, capable of receiving, processing and transmitting data between two devices connected by a physical layer. Due to the increasing application of big data analytics and cloud-based services in various end-user segments, data centers are envisaged to fuel the adoption of Ethernet switches. The augmented global demand for data centers is the key driver for the growth of Ethernet switches market. To satisfy the large and ever-increasing market for Ethernet switches, there are many varieties of switches offered different purposes. This article will help you get a deep understanding of the different types of Ethernet switches.

What is an Ethernet Switch?

A Ethernet switch is a tool for connections between the systems and equipment to forward data selectively to one or more connected devices on the same network. These connections are generally created through the use of structured cabling that links both the station side and the device that you are trying to share data with, such as a server or another computer. In this way, Ethernet switches can control the flow of traffic passing through a network, maximizing the network’s efficiency and security. More advanced Ethernet switches, called managed switches, are also capable of providing additional functions, such as network load balancing, address translation or data encryption and decryption.

FS Ethernet switches

How Dose an Ethernet Switch Work?

Ethernet switches link Ethernet devices together by relaying Ethernet frames between the devices connected to the switches. By moving Ethernet frames between the switch ports, a switch links the traffic carried by the individual network connections into a larger Ethernet network. Ethernet switches perform their linking function by bridging Ethernet frames between Ethernet segments. To do this, they copy Ethernet frames from one switch port to another, based on the Media Access Control (MAC) addresses in the Ethernet frames. Ethernet bridging was initially defined in the 802.1D IEEE Standard for Local and Metropolitan Area Networks: Media Access Control (MAC) Bridges. The standardization of bridging operations in switches makes it possible to buy switches from different vendors that will work together when combined in a network design. That’s the result of lots of hard work on the part of the standards engineers to define a set of standards that vendors could agree upon and implement in their switch designs.

diagram of Ethernet switches connections

Different Types of Ethernet Switches

Ethernet switches are broadly categorized into two main categories – modular switches and fixed switches. Modular switches allow you to add expansion modules into the switches as needed, thereby delivering the best flexibility to address changing networks. Fixed switches are switches with a fixed number of ports and are typically not expandable. This category can be broken down even further into unmanaged, lightly managed, and fully managed.

Unmanaged Switch

An unmanaged switch is mostly used in home networks and small companies or businesses, as it is the most cost effective for deployment scenarios that require only basic layer 2 switching and connectivity. The unmanaged switch is not configurable and have all of their programming built in. It is ready to work straight out of the box. And it is the easiest and simplest installation, because of its small cable connections. An unmanaged switch is perfect in this situation since it requires the least amount of investment with regards to both expense and time.

Smart Switch / Lightly Managed Switch

A smart switch is the middle ground between the unmanaged and fully managed switches. These smart switches offer limited customization, but do possess the granular control abilities that a fully managed switch has. In addition, smart switches offer certain levels of management, quality-of-service (QoS), security, but they are lighter in capabilities and less scalable than the managed switches. Smart switches tend to have a management interface that is more simplified than what managed switches offer. They also offer the capability to set up options like Quality of Service (QoS) and VLANs, which can be helpful if your organization has VoIP phones, or if you want to segment your network into work groups. Therefore, smart switches are the cost-effective alternative to managed switches. They are still valid choices for the regular consumer, as they are generally easy to use and you can glean a bit more information off of them on how your network is configured compared to unmanaged switches.

Fully Managed Switch / Enterprise Managed Switch

Managed Layer 2 Switch: A modern managed switch provides all the functionality of an unmanaged switch. In addition, it can control and configure the behavior of the device. This typically introduces the ability to support virtual LANs (VLANs), which is why almost all organizations deploy managed switches versus their cheaper alternatives.

Managed Layer 3 Switch (Multilayer Switch): This type of switch provides a mix of functionality between that of a managed Layer 2 switch and a router. The amount of router function overlap is highly dependent on the switch model. At the highest level, a multilayer switch provides better performance for LAN routing than almost any standard router on the market, because these switches are designed to offload a lot of this functionality to hardware.

data-center-network-architecture

Managed switches are designed to deliver the most comprehensive set of features to provide the best application experience, the highest levels of security, the most precise control and management of the network, and offer the greatest scalability in the fixed configuration category of switches. As a result, they are usually deployed as aggregation/access switches in very large networks or as core switches in relatively smaller networks. Managed switches should support both L2 switching and L3 IP routing, though you’ll find some with only L2 switching support.

Conclusion

The Ethernet switch plays an integral role in most modern Ethernet local area networks (LANs). Mid-to-large sized LANs contain a number of linked managed switches. Small office/home office (SOHO) applications typically use a single unmanaged switch. This article has introduced the different types of switches. Depending on the number of devices you have and the number of people using the network, you have to choose the right kind of switch that fits your space. FS.COM has provided a comprehensive set of Ethernet switches. If you have any requirements, welcome to visit our website for more detailed information.

Which 10G SFP+ Optics Are Compatible with Intel X520 Adapter?

The escalating deployments of servers with multi-core processors and demanding applications are driving the need for 10 Gbps connections. Intel X520 10 GbE Adapter is the most flexible and scalable Ethernet adapters for today’s demanding data center environments. At the same time, 10G SFP+ optics play the most important role for its 10G connectivity. But seriously, do you know which 10G SFP+ optics are compatible with the Intel Ethernet converged network adapter X520 series? This blog will give you solutions.

Intel X520 Adapter

Intel X520 adapter is powered by reliable and proven 10G Ethernet technology, which offers high performance for high-IO intensive applications and showcase the next generation in 10 GbE networking features for the enterprise network and data center. It is designed for multi-core processors, which supports for technologies such as multiple queues, receive-side scaling, multiple MSI-X vectors and Low Latency Interrupts. It addresses the demanding needs of the next-generation data center by running mission-critical applications in virtualized and unified storage environments. In a multicore platform, the Intel X520 adapter supports Intel I/O Virtualization Technology (IOVT), which helps accelerate data across the platform, therefore improving application response times. For virtualized environments, it offers advanced features with VMDq (Virtual Machine Device Queues) that lower processor utilization and increase I/O performance.

Intel X520 Dual Port 10GbE SFP+ Adapter

Figure 1. Intel X520 Dual Port 10GbE SFP+ Adapter

The Intel X520 adapter provides SFP+ based connectivity options (fiber or DAC cabling). Intel X520 adapters are provided with 7 models: X520-QDA1, X520-DA2, X520-SR1, X520-SR2, X520-DA1OCP, X520-DA2OCP and X520-LR1. X520-SR1 is shipped with 1 SR SFP+ Optic,  X520-SR2 has dual-port and is shipped with 2 SR SFP+ Optics, X520-LR1 has single-port and is shipped with 1 LR SFP+ Optic, and X520-DA2 has dual-port and does not ship with any optics or cables, which is the most suitable one for 10G SFP+ Optics and the most popular one on the market. The following table lists the detailed information of Intel X520 adapter series in Table 1.

Intel X520 Adapter Product Code Connector and Cable Cable Type Ports
X520-QDA1 QSFP+ direct attach copper (4x10GbE mode) QSFP+ direct attached twinaxial cabling up to 10m Single port
X520-SR1 Fiber optic MMF up to 300 m Single port
X520-SR2 Fiber optic MMF up to 300 m Dual port
X520-DA2 SFP+ direct attach copper SFP+ direct attached twinaxial cabling up to 10 m Dual port
X520- LR1 Fiber optic SMF up to 10 km Single port
X520-DA1OCP SFP+ direct attach copper SFP+ direct attached twinaxial cabling up to 10 m Single port
X520-DA2OCP Copper SFP+ direct attached twinaxial cabling up to 10 m Dual port

Table 1: Intel X520 Series Adapters

10G SFP+ Optics for Intel X520 Adapter

A 10 Gigabit Ethernet network is essential for businesses that demand high bandwidth for virtualization and fast backup and restore for an ever-growing amount of data. To ensure maximum flexibility, Intel X520 adapters supports the ability to mix any combination of the SFP+ optical modules, direct attach copper cables or 1000BASE-T SFP modules. Besides, 10G SFP+ Optics are available in both short range (SR) 850 nm and long range (LR) 1310 nm options. This enables customers to create the configuration that meets the needs of their data center environment.

10G SFP+ Optical Modules

Intel Ethernet SFP+ SR optics and Intel Ethernet SFP+ LR optics are the only 10 Gbps optical modules supported. Other brands of SFP+ modules are not allowed and can’t be used with the X520 adapters. The following table lists the supported 10Gb Ethernet SFP+ optical transceivers for Intel X520 adapters in Table 2. (Note: Other brands of SFP+ optical modules will not work with the Intel Ethernet Server Adapter X520 Series.)

10G SFP+ Optical Modules
Name Intel Product Code (MFG PART#) FS P/N Type
Intel 10G SFP+ SR Optical module E10GSFPSR SFP-10GSR-85 Dual Rate 10GBASE-SR/1000BASE-SX
Intel 10G SFP+ LR Optical module E10GSFPLR SFP-10GLR-31 Dual Rate 10GBASE-LR/1000BASE-LX

Table 2: 10G SFP+ Optical Transceivers for Intel X520 Adapters

1000BASE-T SFP Modules

Some 1000BASE-LX and 1000BASE-SX modules can work with Intel Ethernet Converged Network Adapter X520 series. These modules referred to only highlight specifications and compatibility with Intel Ethernet server adapter X520 series. The table lists tested modules in Table 3. Other similar modules may work but have not been tested (many similar modules can be purchased in FS.COM). Remind you to use your own discretion and diligence to purchase modules with suggested specifications from any third party.

1000BASE-T SFP Modules
Name Intel Product Code (MFG PART#) FS P/N Type
Avago Gigabit Ethernet Module ABCU-5710RZ SFP-GB-GE-T 1000BASE-SX
Intel Gigabit Ethernet Module TXN22120 SFP1G-LX-31 1000BASE-LX

Table 3: 1000BASE-T SFP Modules for Intel X520 Adapters

10G SFP+ Direct Attach Copper Cables (10G SFP+Cu)

A direct attach twinaxial cable is a 2-pair shielded copper cabling terminated with SFP+ electrical modules. Intel X520 Adapters require that any SFP+ passive or active limiting direct attach copper cable should comply with the SFF-8431 v4.1 and SFF-8472 v10.4 specifications. SFF-8472 Identifier must have value 03h (You can verify the value with the cable manufacturer). Maximum cable length for passive cables is 7 meters. Support for active cables requires Intel Network Connections software version 15.3 or later. The following table lists the fully compatible 10Gb DAC cables for Intel Ethernet server adapter X520 series in Table 4.

10G SFP+ DAC Cables
Name Product Code (MFG PART#) FS P/N Type
Intel Ethernet SFP+ Twinaxial Cable, 1 meter XDACBL1M SFP-10G-DAC 10G SFP+ Passive Direct Attach Copper Twinax Cable
Intel Ethernet SFP+ Twinaxial Cable, 3 meter XDACBL3M SFP-10G-DAC 10G SFP+ Passive Direct Attach Copper Twinax Cable
Intel Ethernet SFP+ Twinaxial Cable, 5 meter XDACBL5M SFP-10G-DAC 10G SFP+ Passive Direct Attach Copper Twinax Cable

Table 4: 10G DAC cables for Intel X520 Adapters

QSFP+ Breakout Cables

The new QSFP+ single-port X520-QDA1 can connect the server to the latest 40GbE switches with a single cable operating in 4x10GbE mode. This adapter can also utilize existing 10GbE SFP+ switches using the QSFP+ to 4xSFP+ breakout cable. The QSFP+ adapter supports direct attach copper cables and Intel Ethernet QSFP+ SR optical transceivers. Intel Ethernet QSFP+ breakout cables have one QSFP+ connector on one end and break out into four SFP+ connectors on the other end for direct attachment to SFP+ cages. The following table lists the Intel Ethernet QSFP+ breakout cables for Intel adapter X520-QDA1 in Table 5.

Intel Ethernet QSFP+ Breakout Cables for Intel Adapter X520-QDA1
Name Product Code (MFG PART#) FS P/N
Intel Ethernet QSFP+ breakout cable, 1 meter QSFP-4SFP10G-CU1M QSFP-4SFP10G-DAC
Intel Ethernet QSFP+ breakout cable, 3 meter QSFP-4SFP10G-CU3M QSFP-4SFP10G-DAC
Intel Ethernet QSFP+ breakout cable, 5 meter QSFP-4SFP10G-CU5M QSFP-4SFP10G-DAC

Table 5: QSFP+ Breakout Cables for Intel Adapter X520-QDA1

Summary

From what we have discussed, 10G SFP+optics are determined to the data transmission of Intel X520 adapters. SFP+ SR Optics, SFP+ LR optics, 1000BASE-T SFP modules, 10G SFP+ direct attach copper cables and QSFP+ breakout cables are available stock in FS.COM. All SFP+ cables are 100% tested to ensure the compatible and quality. Welcome to visit www.fs.com.

Understanding PoE & PoE Switch

Enterprises are quickly evolving with new network devices to improve communication and security. Power over Ethernet (PoE), a way to deliver electrical power over LAN cables to network devices, has been widely deployed to provide power to various endpoints in the enterprise environments. If you want to upgrade you network to PoE, one way is to deploy a PoE switch. This paper will provide an overview of the PoE technology and PoE switches.

What Is a PoE in Networking?

Power over Ethernet, also known as PoE, is a networking feature defined by the IEEE 802.3af and 802.3at standards. POE is able to combine the two connections into one Ethernet cable so that single network cable will transmit both data and 25W of electricity. By this way, it can minimize the number of wires when installing the network, which realize the lower cost, less downtime, easier maintenance, and greater installation flexibility in networking.

POE-working-principle

Why Use PoE?

Because PoE is allowed to use one cable for both power and data transmission, PoE can save money on purchasing and running cable for networking equipment. It can brings many advantages to the network as follows.

  • Time and cost savings

Network cables do not require a qualified electrician to install them, and can be located anywhere, so PoE eliminates the time and cost of hiring professional electrical installers.

  • Flexibility

Network administrators can deploy devices (eg: IP cameras and wireless access points) at wherever they are needed most, and redeploy easily if required.

  • Safety

Because PoE utilizes a relatively low voltage, it presents low risks of electrical hazards.

  • Scalability

PoE makes it simple to add new equipment to a network.

What is a PoE Switch Used for?

A POE switch is a network switch that has a built-in PoE injection. It can connect other network devices as normal, and the switch will detect whether they are PoE-compatible and enable power automatically. PoE switches are available to suit all applications, ranging from low-cost unmanaged edge switches with a few ports, to complex multi-port rack-mounted units with sophisticated management. They can run PoE up to 100 meters from the switch or hub to the NIC, regardless of where the power is injected. The limitation is not the power, it’s the Ethernet cabling standards that limit the total length of cabling to 100 meters.

POE Switch

Which FS Switches Are PoE-capable?

FS.COM provides fully managed PoE switches, which are available with 8, 24 or 48 PoE Gigabit Ethernet ports of auto-sensing IEEE 802.3af/at. The PoE Switches are ideal for small business networks that need to inexpensively use PoE to deploy wireless access points and IP-based network surveillance cameras. They deliver robust performance and intelligent switching for growing networks, so PoE switches will be a best choice to install and manage your devices. The model details of FS’s PoE switches are listed below.

fs-poe-switches

How to Ensure Successful PoE Deployments?
1.Provide Sufficient Power to the Remote Powered Device

According to the IEEE 802.3af standard, the powered remote device can draw up to 12.95 watts of power. Considering the loss of the cable length, the power sourcing equipment (PSE) must have the ability to provide 15.4 watts of power to each port. For example, a 24-port Ethernet switch needs approximately 370 watts of power to supply the necessary power to each port. The PoE switches should have in excess of 370 watts available in view of the size of the power supply used in each device. It depends on how much power their switching functions require.

2.Connect the Power Source to Uninterruptible and Redundant Power

Connect the critical power-sourcing devices to an uninterruptible power supply, and use devices with dual redundant power supplies to ensure that your critical devices never lose power.

3.Deploy Only IEEE 802.3af-compliant Devices

Carefully read the technical documentation and contact the technical-support number to determine compatibility. Failure to do so will leave you frustrated and will cost you time and money.

4.Pay Attention to Cabling-performance Specifications

Pay close attention to the manufacturer’s specifications and look for Cat5e and Cat6a compliance. Also, you should remember per TIA standards, only four connectors can exist between the switch or hub and the network interface card (NIC). A midspan device should be counted and treated as one of these connection points.

5.Use the Most Cost-effective PoE Method for Your Network

The business motivation behind deploying IP-based technologies like WiFi and VoIP is to decrease networking costs. A significant benefit of PoE is that it runs on your existing infrastructure.

Conclusion

PoE is a recently-developed technology, and it simplifies the enterprise deployment with lower operating expense, higher availability, and faster deployment. FS has provided PoE switches in a variety of specifications, which may make your trip as comfortable as possible. For more information, please welcome to www.fs.com.

Are You Ready to Install White Box Switches in Your Network?

With the development of Cloud services and networking, FS has introduced a series of high performance 40G/100G white box switches. The goal is to provide Web scale organizations and service providers more control and flexibility in their data center networks. So what are white box switches? White box switches refers to the ability to use ‘generic,’ off-the-shelf switching (or white box switching) and routing hardware, in the forwarding plane of a software-defined network (SDN). Moreover, white box switches rely on an operating system (OS), which may come already installed or can be purchased from a software vendor and loaded separately, and then integrate with the deploying organization’s Layer 2/Layer 3 topology and support a set of basic networking features. On the whole, OS is an integral part of white box switches, and the rise of SDN has brought white box switches into the public eye. Next, let’s take a closer look at white box switches.

FS 40G100G White Box Switches

OS Defines White Box Switches

White box switches are useless without software, because every switch needs an operating system. The OS needs to seamlessly integrate with existing L2/L3 topology and support a basic set of features. A common operating system for white box switches is Linux-based, because many open and free Linux tools are available, which can help administrators customize the switches to their needs. Typically, a white box switch may come pre-loaded with minimal software or it may be sold as a bare metal device. The advantage of the white box switches is that switches can be customized to meet an organization’s specific business and networking needs.

FS Network OS

However, how to put the OS on the white box switches? Some vendors sell a complete solution with the OS that is already installed on the white box, while others set up distributors to provide the bare metal devices that the OS is directly brought from the software vendor. Both of these two approaches are feasible, depending on the scale of the deployment and the desire for the network.

SDN & White Box Switches

Beyond the operating system, white box switches are more valuable if they interact with SDN controllers. And the widespread implementation of SDN has boosted the use of white box switches. SDN is an approach to design, build and manage networks, which can separate the network’s control and forwarding planes. In result, the network control will become directly programmable and the underlying infrastructure will be abstracted for applications and network services. The goal of SDN is to enable cloud and network engineers and administrators to respond quickly to changing business requirements via a centralized control console. At the same time, the switches in SDN environment rely on software-based network function virtualization (NFV), which offers great convenience for the users of white box switches. Because white box switch allows its customers to choose the best suitable operating system for themselves. And in the future, most white box switches will function in an SDN environment in which the SDN controller is making forwarding and control-plane decisions from a centralized point for all switches in the network.

sdn

The Growing Market for White Box Switches

In general, the data center Ethernet switch market has seen tremendous growth and investment over the past years. The Layer 2-3 Ethernet switch market is expected to exceed $25 billion in 2019, according to Dell’Oro Group. What’s more, some high-end users are tired of vendor lock-in switches, and they might be ready to try a white box switch to get what they want. White box switches can customize the system to limit unneeded processes and concentrate the processing power of the switch on the important features, so it leads to a customized switch platform that provides perfect performance for a narrow range of uses. Customers with highly unique support needs will also benefit from white box switches. Through the separation of software and hardware, customers can obtain different support levels for hardware and software.

FS 40G/100G White Box Switches Solutions

FS 40G/100G white box switches are based on IPinfusion’s ZebOS with integration of Layer 2 to Layer 4 packet processing engine, traffic management and fabric interface. The aim is to achieve flexibility, scalability, efficiency and cost effectiveness in data center networks. Furthermore, the operating systems of these switches are developed on the basis of Linux and similar to Arista EOS. Last but not least, all the 40G/100G white box switches in FS support SDN function which can make networks more affordable and easier to manage.

fs-40g-100g-white-box-switches

All in all, the S9000 series white box switches support current and future data center requirements, which is ideally suited for data center environments in either Leaf or Spine deployments. They provide superior low latency and power efficiency in a clean PHYless design, while offering high reliability features such as redundant and hot swappable power supplies and fans in forward and reverse airflow configurations. And they provide QSFP+ ports, which enable flexible choices of port speed providing unparalleled flexibility and the ability to seamlessly transition data centers to the next generation of Ethernet performance.

Summary

White box switches can be deployed either in the data center or in the access network. Hyperscale data centers can deploy white box switches to reduce capital expenditures and leverage open SDN tools to improve time to deployment and automation. If you want to deploy white box switches with lower cost and great flexibility, welcome to contact us via www.fs.com.

Switches Used in LAN Network

LAN refers to local area network, which is a network of computers that are in the same general physical location, usually within a building or a campus, share a common communications line or wireless link to a server. Typically, LAN can achieve file management, application software sharing, printer sharing, workgroup scheduling, e-mail and fax communication services and so on. A local area network may serve several hundred users in a larger office, which comprises cables, switches, routers and other components that let users connect to internal servers, websites and other LANs via wide area networks.

LAN network

Figure 1. LAN Frame

How Does LAN Work?

When two or more network devices have data to send at the same time, the data packets from one user may collide with another, because multiple devices cannot talk on the network simultaneously. For this reason, there should be some methods for the data to access the cable without disturbing another at a time.

Access methods define a set of rules governing how computers access the network – put data onto the network cable and take data from the cable at the same time.This is done in two main methods:

Carrier-Sense Multiple Access with Collision Detection (CSMA/CD)
  • All computers listen for traffic on the LAN.
  • If no traffic, computer that wishes to transmit may transmit data.
  • If a collision occurs, computers must wait a random amount of time.(The busier a network becomes, the more collisions occur)
  • The computer with the smallest random number send again first. (In most cases, a collision will not occur again between the two computers.)
Token Passing
  • All computers need the token which is passed around the network.
  • If a computer has data to send, it must wait until it has the token and then sends its data.
  • When the data transmission is completed, the token is released.
  • It helps to calculate the maximum time when a computer has the chance to send data.
Switches used in LAN Network

Switches that provide a separate connection for each computer in the internal network are called LAN switches. Essentially, a LAN switch creates a series of instant networks that contain only the two devices communicating with each other at that particular moment. LAN switches are designed to switch data frames at high speed. LAN switches are the “cornerstone” of building a network platform,which require less configuration, smaller space, fewer cabling, cheaper prices, and higher and more reliable performance.

Switching technologies are crucial to network design that is a form of packet switching used in LAN. LAN switching uses different kinds of network switches. A standard switch is known as a layer 2 switch and is commonly found in nearly any LAN. Layer 3 or layer 4 switches require advanced technology and are more expensive, and thus are usually only found in larger LANs or in special network environments. Here are two main LAN access switches:

S3800-24F4S

S3800-24F4S mode contains one console port that connects to computer for Command Line Interface (CLI) management, four 1GE combo ports, in which RJ45 and SFP ports with same figure are a couple of shared ports, 20 100/1000BASE SFP ports and 4 10GE SFP+ ports.

lan switches

S3800-24T4S

As for S3800-24T4S mode, it offers one console port, 24 100/1000BASE-T ports and 4 10GE SFP+ ports.

lan switches 1

S3800-24F4S and S3800-24T4S high performance Metro Ethernet switches are designed to meet the demand of cost-effective Gigabit access or aggregation for enterprise networks and operators customers, which adopt high performance and low power processor to provide full speed forwarding and line-dormant capacity. Besides, they support multiple configuration modes to make it easy for network management and maintenance and offer flexible port combination form to facilitate user operations so that you can directly connect to a high-performance storage server or deploy a long-distance uplink to another switch.

Outstanding Features of These Switches:
  • Enterprise-Class Features: support advanced Layer 2+ switching and max transfer rate of single port can reach 10GE compared to Layer
  • High-Capacity Uplinks: every port can be used as the uplink port. SFP+ ports support uplinks of up to 10GE. For high-capacity uplinks, the SFP+ ports can reach 40GE via WEB or order.
  • Switching Capacity: offer 128Gbps switching capacity to simultaneously process traffic on all ports at line rate without any packet loss.
  • Line-Dormant Support: the ports will switch to power saving mode when date traffic is relatively small.
Summary

The network switch plays an integral role in most modern Ethernet LAN, because the LAN switches greatly improve the rate of data transmission and the user experience. In addition, LAN access switches are the fundamental solutions to help you save time and focus on more strategic initiatives, which provide high-speed connectivity, application, and communication systems that efficiently and securely manage bandwidth-intensive data transmission.