Frequently Asked Questions

What are the advantages of Wireless Technology?

Here is a list of the many benefits you can realize by deploying wireless solutions in your organization. Convenience. Time savings. Mobility. Flexibility. Lower cabling costs. Lower maintenance costs. Reducing errors. Quicker decision-making. Improved company image. Easier to set up temporary network. Easier to set up temporary offices. Easier adds, moves, changes More efficient use of office space. Better workgroup collaboration. Better responsiveness. Better customer or patient care. Increased competitive advantage. Productivity gains.

What are the apllications of Embedded Microcontrollers?

In addition to the above home monitoring system, embedded processors and microcontrollers are frequently found in: appliances (microwave oven, refrigerators, television and VCRs, stereos), computers and computer equipment (laser printers, modems, disk drives), automobiles (engine control, diagnostics, climate control), environmental control (greenhouse, factory, home), instrumentation, aerospace, and thousands of other uses. Embedded processors and microcontrollers are used extensively in robotics. Embedded processors and microcontrollers are used extensively in robotics. Small size, low power consumption, and flexibility make these devices ideal for unattended data monitoring and recording.

What is an embedded controller?

An embedded controller is a controller (or computer) that is embedded into some device for some purpose other than to provide general purpose computing.

What is the advantage of using a stackable Hub? Why it's important in Fast Ethernet?

Only two 100Mbps Hubs can be cascaded together, so the user counts are also limited. The stackable Hubs which are stacked together are a large Hub logically, so in Fast Ethernet, you could have two stack of stackable Hubs, which will increase the user count. The rule for Fast Ethernet is to STACK the Hub, instead of cascading Hubs.

How to improve the wireless security?

If you would like to make your network environment stay is safe and secure, there are four ways as following can help you to secure your network environment. 1.SSID: Disable SSID, and other wireless network client wont able to search your wireless AP or router, but this way is not the best for wireless security. 2.WEP key: this is the original wireless encryption, it provides 64/128-bits encryption key, so you can follow your demand to setup this function. After finished setup, you will need to type the same WEP key on your wireless network client, so the client can connect to router. 3.WPA-PSK/WPA-PSK2: this encryption is more secure than WEP key, you need to type 8-63 ASCII characters or 64 hexadecimal characters as the "Pre-Shared Key". ?After finished setup, you will need to type the same WEP key on your wireless network client,so the client can connect to router. 4.Wireless MAC Filter: You can fill in the MAC address of your wireless client,and select "deny" or "allow" to control your wireless network.

How fast is wireless computer networking?

First, wireless local area networks (WLANs) feature differing levels of performance depending on which Wi-Fi standard they support. 802.11b WLANs offer maximum theoretical bandwidth of 11 Mbps. 802.11a and 802.11g WLANs offer theoretical bandwidth up to 54 Mbps. (In contrast, typical wired Ethernets run at 100 Mbps.) The performance of Wi-Fi networks in practice never approaches the theoretical maximum. 802.11b networks, for example, generally operate no faster than about 50% of theoretical peak, or 5.5 Mbps. Likewise, 802.11a and 802.11g networks generally run no faster than 20 Mbps.

What is the difference between Multimode and Single mode optical fiber?

Multi-mode optical fiber (multimode fiber or MM fiber or fibre) is a type of optical fiber mostly used for communication over shorter distances, such as within a building or on a campus. Typical multimode links have data rates of 10 Mbit/s to 10 Gbit/s over link lengths of up to 600 meters—more than sufficient for the majority of premises applications. Jacket color is sometimes used to distinguish multi-mode cables from single-mode, but it cannot always be relied upon to distinguish types of cable. The standard TIA-598C recommends, for civilian applications, the use of a yellow jacket for single-mode fiber, and orange for 50/125 µm (OM2) and 62.5/125 µm (OM1) multimode fiber.[3] Aqua is recommended for 50/125 µm "laser optimized" OM3 fiber.

What is PoE Technology?

Power over Ethernet is a technology which enables to connect network devices through ethernet cable. Therefore it is not necessary to use two individual lines/1x data, 1x power supply/ for assurance of data conectivity and supplying. One Ethernet line is sufficient. This technology is applicable for wide range of network products such as Access Points, Routers, IP cameras, modems, switches, embedded computers or other network products.

What is a Fiber Media Converter?

Fiber optic converters are used in the fiber optic network to transform the signals sent from fiber glass to traditional UTP cables. Fiber media converters support many different data communication protocols including Ethernet, Fast Ethernet, Gigabit Ethernet, T1/E1/J1, DS3/E3, as well as multiple cabling types such as coax, twisted pair, multi-mode and single-mode fiber optics.

What is the difference between CAT 6 and CAT 5e cable?

Cat5e cable of good quality can run near or at gigabit speeds, it just cannot be "certified" for this use. By comparison, Cat6 is designed especially for gigabit use, and is certified to operate at said speed. It becomes a matter of whether or not you want to pay all that extra money, for little or no noticeable improvement in the performance of you network. The Simple Answer: CAT-5 is rated to 100M CAT-5e is rated to 350M CAT-6 and CAT6e is rated to 550M or 1000M depending on your source. CAT-6 cable is being made with 23 guage conductor wire as opposed to the slightly smaller 24 guage for CAT-5e and also has a separator to handle crosstalk better.

What is he difference between a PC, SPC, UPC and APC finish on a fiber optic connector? And which one you should choose?

Whenever a connector is installed on the end of fiber, loss is incurred. Some of this light loss is reflected directly back down the fiber towards the light source that generated it. These back reflections, or Optical Return Loss (ORL), will damage the Laser Light Sources and also disrupt the transmitted signal. Various polish profiles are used, depending on the type of fiber and the application. For singlemode fiber, the fiber ends are typically polished with a slight curvature, such that when the connectors are mated the fibers touch only at their cores. This is known as a "physical contact" (PC) polish. A typical hand polished connector will measure at –30dB. To reduce the back reflection of a connector, it can be polished to SPC (Super Physical Contact) polish or UPC (Ultra Physical Contact) polish. Industry standard is a minimum of –40dB for SPC back reflection measurement and –50dB for UPC back reflection measurement. If even less back reflection is required, an APC, or Angled Physical Contact polish, might be necessary. An APC connector has an 8º angle cut into the ferrule. These connectors are identifiable by their green color. An APC polished connector has an Industry Standard Minimum f –60dB ORL measurement. APC fiber ends have low back reflection even when disconnected.

What is a Broadband Router?

A Broadband routers contain several features beyond those of traditional routers. Broadband routers provide DHCP server and proxy support, for example. Most of these routers also offer integrated firewalls. Finally, wired Ethernet broadband routers typically incorporate a built-in Ethernet switch. These routers allow several hubs or switches to be connected to them, as a means to expand the local network to accomodate more Ethernet devices.

What is the difference between solid and stranded CAT5 cable, and which one is better?

Generally speaking, stranded CAT5 is more commonly used in home networking than solid CAT5. Stranded cables are more flexible than solid ones, that allows cabling to be moved around the home without fear of cracking the wires inside. Stranded cables also cost less than solid cables Solid CAT5 cables have their advantages, too. Theoretically speaking, solid CAT5 supports a higher level of performance due to its superior electrical properties compared to stranded cables, though the benefit can be negligible in practice. Businesses that are accustomed to wiring inside office walls or under floors to fixed locations, and are willing to pay more for the possibility of improved network performance, often prefer solid cabling. Finally, when working with CAT5 cable, it's important to know that several different types of RJ-45 connectors exist. One type, designed for use with stranded cables, generally is incompatible with solid cable. Other types of RJ-45 connectors may work with both stranded and solid CAT5.

How Many Computers Can Share a WiFi Network?

Most WiFi wireless access points / routers claim to support up to 255 connected devices. Access points and routers support a small number (usually either 1 or 4) of wired Ethernet and the rest via wireless connections. Connecting 255 computers to a single WiFi access point, while theoretically possible, is not recommended. Performance of such a network will be very poor. Install multiple access points instead to distribute the network load. By adding more access points to the network, effectively any number of computers can be supported (though the network becomes progressively more difficult to manage). On a home network, while dozens of computers and other devices may connect to the router, the performance of a shared Internet connection will quickly degrade as more computers access the Web simultaneously.

What is a router?

Traditional routers are designed to join multiple area networks (LANs and WANs). On the Internet or on a large corporate network, for example, routers serve as intermediate destinations for network traffic. These routers receive TCP/IP packets, look inside each packet to identify the source and target IP addresses, then forward these packets as needed to ensure the data reaches its final destination.

What is the difference between a hub and a switch?

Technically speaking, hubs operate using a broadcast model and switches operate using a virtual circuit model. When four computers are connected to a hub, for example, and two of those computers communicate with each other, hubs simply pass through all network traffic to each of the four computers. Switches, on the other hand, are capable of determining the destination of each individual traffic element (such as an Ethernet frame) and selectively forwarding data to the one computer that actually needs it. By generating less network traffic in delivering messages, a switch performs better than a hub on busy networks.