Trending Definitions
Byte Order Mark (BOM)
Okay, let's speak about BOMs or Byte Order Marks. What the earth is a BOM, you might be asking yourself right now. What a great topic! A BOM is a series of bytes that, in computing words, indicates the byte order of a file or a stream of data. In essence, it instructs your computer in which direction to access the file. Depending on your system, how those bytes are organized can vary based on how computers store data in tiny units called bytes. Some systems receive the least significant byte first, called the "little-endian" byte order. Other systems receive bytes in "big-endian" order, which starts with the actual byte. Therefore, if you attempt to access a file made on a big-endian system on a little-endian system, the computer may become perplexed and read the bytes out of order. The BOM steps in at this point! It functions as a tiny flag that alerts the computer that the file was made using big-endian byte order. Now, things get intriguing because not all file formats use BOMs. Some file formats, such as UTF-8, expressly forbid using BOMs. So there may be problems if you include a BOM in a UTF-8 file. There are other possible problems with BOMs as well. If you include a BOM in a file you transmit to someone using old software, they might see some strange characters initially because some older software doesn't know what to do with BOMs. Therefore, while BOMs can help instruct your computer how to read a file, they could also give you headaches if you need to be more cautious. As with many other things in life, equilibrium is critical. A BOM is a brief byte sequence that instructs your computer how to open a file. It resembles a tiny pennant with the message, "Read me this way!" However, not all file formats support BOMs, and sending a file in the incorrect format or to a recipient with outdated software may result in problems. So friends, use BOMs carefully!
...See MoreCisco Network Admission Control (Cisco NAC)
Cisco Network Admission Control, sometimes called Cisco NAC, functions similarly to a doorman or bouncer at your company's network. Its job is to check who is coming in, ensure they are allowed, and stop people who shouldn't be there from getting in. Consider it this way: you wouldn't let anyone into an exclusive nightclub, would you? You will want to ensure that everyone who enters is either on the guest list or, at the very least, is dressed suitably for the occasion. That is precisely what the Cisco Network Admission Control performs for your network. Cisco Network Admission Control will examine the credentials of all devices attempting to join your network to determine whether or not it is appropriate for them to do so. It validates devices by having them enter things like usernames, passwords, and certificates so that only the appropriate ones are allowed in. Once a device has been granted access, Cisco NAC will monitor it to ensure that it is following the policies and procedures that have been established. Cisco NAC will remove a device from the network if it starts acting strangely, like downloading malware or trying to attack other devices. Cisco Network Admission Control also offers administrators of the network real-time visibility into activities taking place on the network. It's the same as having a spy working for you within the organization, reporting on everything that happens and alerting you if anything appears out of the ordinary. In addition, like a competent doorman, Cisco NAC can adjust its behavior in response to varying conditions. Your network will remain secure even in the face of new dangers if you maintain current Cisco Network Admission Control (NAC) versions. In conclusion, Cisco Network Admission Control is something you need if you want to ensure the safety and security of your network. It is the equivalent of having a highly skilled bouncer at the entrance, verifying everyone's credentials, and ensuring that only the appropriate people are let in. You may relax knowing that the security of your network is being handled competently since Cisco NAC is on the job.
...See MoreCarrier
Do you know what they say: If you can't beat them, join them. That's exactly what the carriers did. Carriers provide mobile services and do it in a BIG way. You may have heard the terms "carrier" or "mobile network operator," but there are many other names, too—all of which mean pretty much the same thing. Some include mobile phone operators, wireless service providers, and mobile operators. A carrier is just a company that offers mobile services to customers through its network of cellular towers. If you have an iPhone and want to make calls using your phone's data plan (or WiFi), you're probably using one of these companies' networks to make those calls! To become a carrier, you must start with a license many people take for granted. You see, there's a lot of radio frequency out there, and the government owns it. So if you want to use the airwaves, you must get government permission first. To get that permission, you must apply for a radio spectrum license from the government. Your frequency range will depend on what kind of technology you wish to employ. For example, GSM (Global System for Mobile Communications) utilizes a different frequency range than CDMA (Code Division Multiple Access). The best part about the wireless industry is that it's not just about phones. It's about opening up new opportunities for people to communicate and connect with others. It's about making it more comfortable for people to get information, whether finding out what happened on the latest episode of their famous show or looking up directions to a new restaurant. It's also about getting work done—like sending emails or taking notes at meetings—without being tied down by wires and cords. If you're interested in becoming a wireless carrier, you'll need to figure out where your customers will be. Then you can start building your network infrastructure and offering services like voice, SMS/MMS, and Web access.
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