How does a port scanner work?
The port scanner is a software application which is designed to scan a server for open ports. This product is usually most often used by administrators who wish to verify security policies of their networks by running scans on them.
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A price scanner is often found in supermarkets and they allowcustomers to check the price of any given product. A price scannerworks by reading the bar code.
An ultrasound scanner is a scanning machine to do with sound. As the ultrasound scanner moves back and forth over your body, it sends sound waves through your skin and muscle. The sound waves are then turned into images that appear on TV screens, and can also be copied onto paper or X-ray film.
There are a few different types of image scanners, most modern ones use a charge-coupled device (CCD) or a contact image sensor(CIS) as the image sensor. In a flatbed scanner this sensor is mounted on an aparatus which moves the sensor across the page to scan the entire image. In a hand-held scanner… the sensor is mounted in a drum which the user rolls across the page to scan the image. (MORE)
Answer--. A device that can read text or illustrations printed on paper and translate the information into a form the computer can use. A scanner works by digitizing an image -- dividing it into a grid of boxes and representing each box with either a zero or a one, depending on whether the box is f…illed in. (For color and gray scaling, the same principle applies, but each box is then represented by up to 24 bits.) The resulting matrix of bits, called a bit map, can then be stored in a file, displayed on a screen, and manipulated by programs.. Optical scanners do not distinguish text from illustrations; they represent all images as bit maps. Therefore, you cannot directly edit text that has been scanned. To edit text read by an optical scanner, you need an optical character recognition (OCR ) system to translate the image into ASCII characters. Most optical scanners sold today come with OCR packages.. Scanners differ from one another in the following respects:. scanning technology: Most scanners use charge-coupled device (CCD) arrays, which consist of tightly packed rows of light receptors that can detect variations in light intensity and frequency. The quality of the CCD array is probably the single most important factor affecting the quality of the scanner. Industry-strength drum scanners use a different technology that relies on a photomultiplier tube (PMT), but this type of scanner is much more expensive than the more common CCD -based scanners.. resolution: The denser the bit map, the higher the resolution. Typically, scanners support resolutions of from 72 to 600 dpi.. bit depth: The number of bits used to represent each pixel. The greater the bit depth, the more colors or grayscales can be represented. For example, a 24-bit color scanner can represent 2 to the 24th power (16.7 million) colors. Note, however, that a large color range is useless if the CCD arrays are capable of detecting only a small number of distinct colors.. size and shape: Some scanners are small hand-held devices that you move across the paper. These hand-held scanners are often called half-page scanners because they can only scan 2 to 5 inches at a time. Hand-held scanners are adequate for small pictures and photos, but they are difficult to use if you need to scan an entire page of text or graphics.. Larger scanners include machines into which you can feed sheets of paper. These are called sheet-fed scanners. Sheet-fed scanners are excellent for loose sheets of paper, but they are unable to handle bound documents.. A second type of large scanner, called a flatbed scanner, is like a photocopy machine. It consists of a board on which you lay books, magazines, and other documents that you want to scan. (MORE)
there are so many types of scanners, like X-ray scanners, gamma ray scanner, RF scanners, biological scanners , etc. so please specify the the type of scanner requiring the explanation.
The document scanner is a device used to scan a document. You can save it and then print it later. They are very handy! The link below has a more detailed explanation.
Document Scanners have a glass plate and a cover. There is also a lamp used to illuminate the document. The scanner moves a mirror, reflecting the light across the document. The light is picked up by a simple CCD camera chip and digitizes the data line by line, like a slow scan TV. ---------------…------------------------------------------------------------------------------- Scanners have become an important part of the home office over the last few years. Scanner technology is everywhere and used in many ways: . Flatbed scanners , also called desktop scanners, are the most versatile and commonly used scanners. In fact, this article will focus on the technology as it relates to flatbed scanners. . Sheet-fed scanners are similar to flatbed scanners except the document is moved and the scan head is immobile. A sheet-fed scanner looks a lot like a small portable printer. . Handheld scanners use the same basic technology as a flatbed scanner, but rely on the user to move them instead of a motorized belt. This type of scanner typically does not provide good image quality. However, it can be useful for quickly capturing text. . Drum scanners are used by the publishing industry to capture incredibly detailed images. They use a technology called a photomultiplier tube (PMT). In PMT, the document to be scanned is mounted on a glass cylinder. At the center of the cylinder is a sensor that splits light bounced from the document into three beams. Each beam is sent through a color filter into a photomultiplier tube where the light is changed into an electrical signal. The basic principle of a scanner is to analyze an image and process it in some way. Image and text capture (optical character recognition or OCR) allow you to save information to a file on your computer. You can then alter or enhance the image, print it out or use it on your web page. ---------------------------------------------------------------------------------------------- A scanner is used to scan in printed photographs and other documents so they can be put into documents or web pages. It uses a light source, typically a cold cathode lamp to illuminate the scanned imaged. The light is then reflected off the object and into Charged Coupled Device (CCD). The Charged Coupled Device collects the information, and through a series of electronic devices converts the analog signal into a series of digital signals which can then be read and processed by the internal electronics of the scanner and subsequently a computer. ---------------------------------------------------------------------------------------------- (MORE)
A fingerprint scanner works by emitting a focused light (usually LED) which is reflected back by the fingerprint surface. Because the raised portion reflects back light more effectively than the non-raised portions, a computer can easily determine the pattern and record them. A computer then can det…ermine the characteristics of that fingerprint image, (i.e. ridge ending - a line that stops, bifurcation - two line come together as one, ridge point - a dot, and enclosure - a set of bifurcations that form an enclosed circle-like characteristic.) A mathematical equation is then used to identify certain points and count the number of ridges between them.. (MORE)
it uses a scanning device to scan things to the computer word by word... you can read its working in simple words from here : see related links
Where is the diagnostic scanner port in a 2004 Explorer I have an OBD II CAN scanner but can't find the port connector. Thanks?
There should be a connector under the dash, driver side.. It is located right above the park brake release lever facing straight down.
A scanner works by capturing the digital image of document anduploading it to the computer. The image can then be altered andreprinted.
Yes, it does. If you need help with it, here is HP's product support page for that model: . http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00040499&lc=en&dlc=en&cc=us&product=3192753&rule=34253â©=en
Today (October 2011) most desktop scanners (and honestly, most external hardware) will connect to the computer via a USB port.
Does not have one, 96 had this port under the steering wheel. Yours is a OBD1 under the hood behind the battery.
The EEC TEST connection is by your power distribution box in your engine. compartment ( EEC - IV / OBD I )
there is not a scanner port on 87 hondas, the ecu will flash the code from the led on top of the computer.. dachonda
It uses 2 main parts, a light source (usually a cold cathode tube) and a light sensor (similar to that of a photo camera). The two parts are usually on a tray that sweeps the paper at a slow speed so that more detail is captured by the sensor.
light source underneath the picture or document illuminates the image. space white or black reflect more light than do inked and colored area. a motor moves the scan head underneath the page.when the scan head is moving it capture light that was reflected from individual areas of the page about 1/…90,000 of an inch. (MORE)
Took me a bit, but stick your head down underneath your steering wheel (close enough to kiss the fuse box) then look directly up. There it is!!
You plug a new scanner into a USB port on your Windows XP When you first turn on the scanner what should you expect to see?
A new window will open and windows will search its database for a driver. If windows happens not to have the driver, then you must manually install the driver by inserting the installation CD that came with the scanner.
A scanner is a computer device that scans images, printed text,handwriting or an object and makes it a digital image. A paper oritem is placed on the glass surface, and then the cover is closedto prevent lens damage. It scans the document and makes a duplicateimage on the computer.
" http://wiki.answers.com/Q/Does the parallel port is a socket used to connect a device such as a printer or a scanner "
YES, This is not a problem with the hp software or driver. The XP software and driver do work in Vista32. The problem is in the vista security settings for the scanner. I would recommend that you install the HP Precision scan software. Then click the start button, scroll up to the HP Precision s…can folder. Right mouse click on the folder icon and select properties. Select the security tab. Use this tab to edit the "everyone" security properties to allow "FULL CONTROL". Check out this fantastic link to walk you through this: http://www.pixel2life.com/publish/tutorials/399/how_to_get_your_hp_scanjet_5300c_working_in_windows_vista/ If this does not work initially, you may need to uninstall the software, unplug the scanner and walk through this from the beginning. I personally have been successful with both the 5200 and 5300 scanners. Share this trick, I expect that this is the same issue with a number of XP issues when run under vista. (MORE)
You read the instructions or maybe even common sense... but still read the instructions beforehand because it is the right way. =)
Look directly under the steering colunm in the passenger compartment... should be located just under the dash.
You either have a power supply problem, or if the ports are coming straight off of the motherboard, which they normally are then you obviously have a motherboard problem. Part of it could have shorted out and the only thing you can really do is replace it.
A flatbed scanner serves as a means to inspect shipments by flatbedtrailer. It is most commonly used at major border crossings. Thedriver drives through the device slowly while a worker looks at atelevision screen that depicts what the scanner sees.
They work by scanning the food or labels to scan it to bye the food... Ha
Signals are sent from a police officer's radio to a "Repeater" located on a building somewhere. That repeater will have a signal code. for example... 159.900 is a signal frequency code. When your scanner is set on that code, or any other code, it will receive the transmissions from that code where e…ver you are that the signal will reach. (MORE)
I believe there is an EEC TEST connection in the engine compartment ( OBD I / EEC IV ). near the battery or power distribution box
Any scanners that are supported by SANE ("Scanner Access Now Easy") will work in Ubuntu. Note that you will need to add yourself to the "scanners" groupand log out and back in. A link in the "Related links" section below will show a list of supported models of scanner by manufacturer.
That depends entirely on your scanner. Many cover the 800MHz band, but some don't. Also, if they're moving to that band, chances are that your local agencies are upgrading to a trunking system - something that may or may not be compatible with your scanner. Visit www.RadioReference.com to research f…requencies and systems in your area, then check your scanner's manual to see if it will work. (MORE)
What could be wrong with a 2000 Ford Expedition when a code scanner is plugged into the port but does not turn on?
Fuse # 3 is a 20 amp fuse for the OBD II scan tool connector and the cigarette lighter
Antimalware scanners used to use signature databases to see if your computer was infected... When the program was run it would check to see if certain conditions where true (for example: new registry keys, files / folders) and if they where it would show the infection that made those changes. The pr…ocess of finding new infection, creating signatures and publishing them took to long, new viruses where being made while they where still trying to detect and remove the old ones! Today, antimalware scanners use behavior based or heuristic (bloodhound) detection tools, they are like watchdogs... Looking for common changes made by malware, when sensitive settings are modified by a program the user is notified. It is now common to see a malware scanner that has both signature and behavior based, for maximum prevention and removal. Overview: --Behavior based scanners are good mainly for prevention --Signature based scanners are good mainly for removal of threats. --Maximum protection is achived when both methods are combined (MORE)
In computing, an image scanner -often abbreviated to just scanner - is a device that optically scans images, printedtext, handwriting, or an object, and converts it to a digitalimage. Common examples found in offices are variations of the desktop (or flatbed) scanner where the document is placed o…na glass window for scanning. Hand-held scanners , where thedevice is moved by hand, have evolved from text scanning "wands" to3D scanners used for industrial design, reverse engineering, testand measurement, orthotics, gaming and other applications.Mechanically driven scanners that move the document are typicallyused for large-format documents, where a flatbed design would beimpractical. Modern scanners typically use a charge-coupled device (CCD) or aContact Image Sensor (CIS) as the image sensor, whereas older drum scanners use a photomultiplier tube as the imagesensor. A rotary scanner, used for high-speed documentscanning, is another type of drum scanner, using a CCD arrayinstead of a photomultiplier. Other types of scanners are planetaryscanners, which take photographs of books and documents, and 3Dscanners, for producing three-dimensional models of objects. Another category of scanner is digital camera scanners, which arebased on the concept of reprographic cameras. Due to increasingresolution and new features such as anti-shake, digital camerashave become an attractive alternative to regular scanners. Whilestill having disadvantages compared to traditional scanners (suchas distortion, reflections, shadows, low contrast), digital camerasoffer advantages such as speed, portability and gentle digitizingof thick documents without damaging the book spine. New scanningtechnologies are combining 3D scanners with digital cameras tocreate full-color, photo-realistic 3D models of objects source wikipedia For further information about expert in this area visit Print ThatNow's website (MORE)
There should be a button to confirm you are preparing to scan something. Once you do that, you can put the paper into the feeding end of the scanner and it will roll through. After that everything should fall into place.
Barcode scanners begin by illuminating the code with red light. The sensor of the barcode scanner detects the reflected light from the illumination system and generates an analog signal with varying voltage that represent the intensity (or lack of intensity) of the reflection.
You will need to first scan your image and then save it as a file that photoshop recognizes (jpeg, tiff, png, etc.) You can then open the image from photshop (file-> open)
It really depends on the type of motherboard and esata port. some computers can have a esata port compatible with usb 2.0. how you would know if your esata port is compatible with usb 2.0 is, it will have the actual usb logo (thing that looks like 3 wires coming from one wire)
Now if you mean how does it catch a attacker: If a large amount of packets are being sent through ports that are above normal, or above the standards sent, it would assume its a attacker and posibly close the port until future action is stated. If you mean how a attacker finds a port: The atta…cker merely sends multiple small packets to multiple ports and sees which comes with a received message, stating it is a open port prone to attack. (MORE)
An IBM PC parallel port used to be a standard socket on manycomputers used to connect to printers, scanners, and other suchdevices equipped with a Centronics port socket. However this kind of interface is now generally considered to be obsolete and almost no computer or device uses it anymore.USB h…as replaced it on most computers and devices and most modernprinters, scanners, and other such devices are now networkcompatible (e.g. EtherNet, WiFi) and can transfer data much fasterthan the old parallel port was capable of. (MORE)
The Most common issues for usb ports to stop working is that the port its self is damaged. The damage can occure in multiple ways, either the port was defective, or a device used shorted out the port. Now if this occurs on a laptop their is very little you can do, other then having the USB board …replaced or repaired. If this occures on a Desktop PC, you cannot repair the onboard USB ports but you can get a USB PCI/E card to extemd your ports. As well you can also get a hub to regain some lost ports. (MORE)
A bar code laser scanner works by shining a bright light (laser light) at the barcode and measuring the reflected beam. In order to scan the entire barcode very quickly, the light is bounced off a spinning disk to cover the entire barcode in one pass.
The Metrologic barcode scanner is one of the most popular barcode scanners. These scanners are widely used in grocery stores and hardware stores. They allow the ability to scan barcodes to bring up product information for purchases or additional information about a product.
3d laser scanners work by analyzing an object from all sides and collect the data in it's computer to replicate the object. They use a cone-like field of vision, similar to cameras, to copy the size and distances in the shape to copy it.
You can download port scanner software for free on download sites such as softpedia, CNet, and tucows. Many of these downloads may be limited with the free version so pick your download carefully.
The PDA barcode scanner works by scanning the unique barcode attached to every item and searching it's database to find the corresponding information related to the product scanned. It reads the barcode by illuminated the barcode with red light and the sensor found within the PDA detects the reflect…ed light. (MORE)
CCD barcode scanners work by illuminating the code with a red light, which is then reflected off, and collected by a scanner. The scanner analyzes the patterns, and decodes the code into ASCII text which can be read.
A cordless scanners works like how a cellphone or a regular cordless phone works. There are electrical signals that are connected between the scanners and the device you are using.
A port scanner such as AngryIP or ipscan will allow a hacker (orthe owner of a system or network) to investigate a computer system(or multiple systems or a network) and determine what port numbersare open and/or being responded to and possibly what software andcapabilities are available on the syste…m at that port number. . It will help a hacker in trying to penetrate a system. . It can help the system owner in knowing what ports are exposedto attack so that measures can be taken to close them or securethem. (MORE)