Serial Ports- CompTIA A+ 220-1101 – 1.24 скачать в хорошем качестве

Serial Ports- CompTIA A+ 220-1101 – 1.24

Let’s have a look at serial ports. Download PowerPoint: https://itfreetraining.com/handouts/a... Serial Ports Serial cables and their ports are mostly obsolete nowadays. You won’t find them used with new equipment and they are pretty close to being considered completely obsolete like many devices before them. If I were to take a guess, I would say this would be the last A+ course to include serial cables before it is dropped from the content. The serial interface is only generally used to access old equipment. For this reason, I doubt you will see an exam question on it, because generally the exam will focus on new technology rather than old technology. In your IT career, you may never have the need to access a device using a serial cable. If you do, you may want to use a video like this one to assist you in the process. I personally would not worry about remembering too much about serial cables. Essentially, just have a basic understanding of how they work and where to find information about how to use them, in the rare case you may need to use one. Serial Ports In the old days of computing, a computer would commonly have two serial ports. The smaller DE-9 serial port and the larger DB-25 serial port. The D in the connector refers to the shape of the connector. The E and B in the connector refers to the size of the connector. The number at the end refers to the number of pins in the connector. In some cases, you may hear a serial port referred to as RS-232. RS-232 refers to the protocol used by the serial port for communication. The larger serial port transmits the same amount of data and speed as the smaller one. What is different between the two is the extra pins provide extra functionality. This extra functionality went mostly unused and as time passed manufacturers stopped using them in their devices. As a consequence of this, computers stopped using the larger port and it became more common to see two smaller serial ports. As time went on, technology such as USB replaced the need to have serial ports. USB is simpler to use and offers much faster speeds. Thus, computers started only having a single serial port and more USB ports started being used. Time went on, and the serial port was removed completely. In some cases, your motherboard may have a header on it to connect a serial port to; however, even that is starting to become rare. There are USB to serial port adapters on the market. Therefore, if you need to access one nowadays, the simplest and easiest way is often to purchase a USB to serial port adapter. Let’s have a look at an example of when you may use a serial port to get an idea of how it would work. Serial Access to Fiber Switch This is an old SilkWorm fiber switch that has a serial port on the front. You generally find nowadays, that, if a device has a console port, it will probably use an ARJ-45 port or a USB port rather than a serial port like this one. Regardless of which port the device has, it will act as a serial port to access the text console of the device. Not all devices will have one. Nowadays, a lot of devices will be accessible using the network. Most administrators will use the console port for initial network configuration only. Once the network is configured, they will access the device via the network. For a lot of newer devices, the initial configuration can be performed using a network connection and the console port is not required. In most cases nowadays, the device will also have an interface that can be accessed using a web browser, which will be simpler for making configuration changes rather than using the console. The other time that an administrator will access the device using a serial port is when they can’t access the device using the network, perhaps due to a network misconfiguration or a factory reset needing to be performed on the device. Serial Port Header Let’s now have a look at connecting our fiber switch to a serial port using the motherboard serial header. In this example, I will use a serial port bracket to connect to the serial port header on the motherboard. Since a serial port is often used to connect to a console, you may also hear this referred to as a console port or COM port. Description too long for YouTube. Please see the following link for the rest of the description. https://itfreetraining.com/ap11/1c25 References “The Official CompTIA A+ Core Study Guide (Exam 220-1101)” page 38 “Picture: Typewrite” https://pixabay.com/photos/black-type... “Picture: Floppy Disks” https://pixabay.com/photos/isolated-f... “Picture: Cassette Tape” https://pixabay.com/photos/mixed-up-c... Credits Trainer: Austin Mason https://ITFreeTraining.com Voice Talent: HP Lewis http://hplewis.com Quality Assurance: Brett Batson https://www.pbb-proofreading.uk