Free Stuff & Learning materials

Power over Ethernet (PoE) is a technology that allows network cables to carry electrical power along with data, enabling powered devices to receive power and data from a single Ethernet cable. PoE is commonly used for powering IP phones, wireless access points, and network cameras, among other devices. There are different types of PoE, including Passive PoE, Active PoE, PoE+, and PoE++. Here's a brief overview of each type: Passive PoE: In Passive PoE, power is simply applied to the Ethernet cable, regardless of whether a device is connected or not. The power level is fixed and cannot be adjusted. Passive PoE is often used for non-standard applications and can be less reliable than other types of PoE. Active PoE: Active PoE uses negotiation between the device and the power source to determine the required power level. This allows for more precise power delivery and can help prevent damage to devices that cannot handle higher power levels. PoE+: PoE+ (also known as IEEE 802.3at) pro...

To calculate the battery backup time of a UPS (Uninterruptible Power Supply), you need to know the following information: Battery capacity in Ampere-hours (Ah): This is the total amount of charge the battery can store. It's usually written on the battery or the UPS specification sheet. Load in watts (W): This is the amount of power the UPS is supplying to your devices. It's usually written on the device's label or the UPS specification sheet. Efficiency of the UPS (%): This is the percentage of power that the UPS can deliver to your devices compared to the power it draws from the wall outlet. It's usually written on the UPS specification sheet. Once you have these three pieces of information, you can use the following formula to calculate the battery backup time of the UPS: Battery backup time (in hours) = Battery capacity (in Ah) x Efficiency (%) / Load (in watts) For example, if you have a UPS with a battery capacity of 100 Ah, an efficiency of 90%, and a load of 200 ...

  When buying a hardware firewall, there are several factors you should consider. Here is a checklist of important things to consider: Performance: Determine the required throughput and session capacity to meet the needs of your network. Security features: Look for features such as intrusion detection and prevention, VPN support, content filtering, anti-virus, anti-spam, and application control. Ease of use: Make sure the firewall has a user-friendly interface for easy configuration and management. Scalability: Consider the ability to add or upgrade hardware components to accommodate future growth. Integration: Determine how well the firewall integrates with your existing network and security infrastructure. Support: Look for a vendor with a good reputation for providing timely and effective support. Price: Evaluate the total cost of ownership, including hardware, licensing, and ongoing maintenance and support costs. Compliance: Check if the firewall meets any regulatory or complia...

  When buying a printer, here are some important things to consider: Purpose: What do you need the printer for? Is it for personal or business use? Will you be printing documents or photos? This will help you determine the type of printer you need. Type of printer: There are various types of printers available, including inkjet, laser, and all-in-one printers. Inkjet printers are ideal for printing photos and graphics, while laser printers are better for printing large volumes of text documents. All-in-one printers can print, scan, copy and sometimes fax, all from one machine. Printing speed: If you need to print a lot of pages quickly, look for a printer with a high printing speed. Keep in mind that the speed quoted by the manufacturer may not be the actual speed you experience in real-world use. Connectivity: Determine how you want to connect to the printer. Options include USB, Wi-Fi, Ethernet, or Bluetooth. Wi-Fi or Ethernet connectivity allows you to connect the printer to a n...

' First add the mail merged fields and save the document 'Then reopen the word document and click no to SQL import and open VBA editor and paste this script 'Finally save this as a macro enabled document and test this code 'Happy coding Option Explicit Dim FOLDER_SAVED As String Dim SOURCE_FILE_PATH As String Function ReplaceIllegalCharacters(strIn As String, strChar As String) As String     Dim strSpecialChars As String     Dim i As Long     strSpecialChars = "~""#%&*:<>?{|}/\[]" & Chr(10) & Chr(13)     For i = 1 To Len(strSpecialChars)         strIn = Replace(strIn, Mid$(strSpecialChars, i, 1), strChar)     Next     ReplaceIllegalCharacters = strIn End Function Sub TestRun() Dim MainDoc As Document, TargetDoc As Document Dim dbPath As String, FileName As String, Folder As String Dim recordNumber As Long, totalRecord As Long, startingRec As Integer, endingIndex As Integer Dim Answer As VbM...

 #!/bin/bash : ' BASH Script that mimics a 4 function calculator. A function called addition. This function will take two arguments and will return the sum of these two arguments. Be sure to check that the values are valid numbers. A function called subtraction. This function will take two arguments and will return the difference of these two arguments. A function called multiply. This function will take two arguments and will return the product of these two arguments. A function called divide. This function will take two arguments and will return the quotient of these two arguments. First argument is an option that chooses what to do with the two other arguments. The options should be as follows: -a Perform addition of the two numbers -s Perform subtraction of the two numbers -m Perform multiplication of the two numbers -d Perform division of the two numbers Second argument should be the first number used for the math problem Third argument should be the second number used fo...