The ability to switch between different sets of network settings (locations) can be useful in circumstances such as these:

Macbook Pro Network Settings
Networking Tools For Mac
Networking Mac And Windows 10

Take your Mac to the stage with a full-screen interface optimized for live performance, flexible hardware control, and a massive collection of plug-ins and sounds that are fully compatible with Logic Pro X. Learn more about MainStage 3. Final Cut Pro X.
At one time, a typical Mac user would no more have connected a couple of computers to the Internet via a local network than they would have extracted their own kidney.

You use the same type of network (such as Ethernet) at work and at home, but the settings you use at work don't allow your Mac to automatically connect to the same type of network at home.
Your Mac connects to more than one type of network service (such as both Wi-Fi and Ethernet) at work and at home, but at work you want your Mac to try connecting to the Ethernet network first, and at home you want your Mac to try connecting to the Wi-Fi network first. In other words, you want to set a different service order for each location.
Your Mac isn't connecting to your network and you want to quickly reset your network settings for testing purposes, without losing your current network settings.

In each of these examples, the Location feature of Network preferences can help.

If you want to go under the hood, Apple includes a suite of tools on your Mac to help you troubleshoot networking issues; they’re all included in the Network Utility app, which you can find in.

How to add or remove a network location

Choose Apple menu () > System Preferences, then click Network.
The Location pop-up menu shows the name of your currently selected set of network settings. The default location is named Automatic. Choose Edit Locations from this menu.
Click the Add (+) button below the list of locations, then type a name for the new location, such as Work or Home or Mobile. (To remove a location, use the Remove (–) button below the list.)
Click Done. The Location menu should now show the name of your new location. Any changes you now make to your Wi-Fi, Ethernet, or other network settings will be saved to that location when you click Apply. The network settings in your previous location remain as you left them, so you can use the Location menu to switch back at any time.
Click Apply to save your settings and complete the switch from the previous location to the new one. Your Mac then automatically tries to determine the correct settings for each type of network. If you need to change the settings manually, remember to click Apply again after making your changes.

How to switch between network locations

If you have more than one location, you can use either of these methods to switch between them:

Use the Location pop-up menu in Network preferences, as described above. Remember to click Apply after choosing a location.
Or choose Apple menu > Location from the menu bar, then choose your location from the submenu.

How to change the network service order

If you're using network locations because you want each location to prefer a different network service (such as Wi-Fi or Ethernet) when connecting, follow these steps to change the service order (also known as port priority) in each location.

Choose Apple menu > System Preferences, then click Network.
Use the Location menu to choose the location you want to modify.
Click below the list of services, then choose Set Service Order.
Drag services within the list to change their order. Your Mac will try to connect to the service at the top of the list first, then continue in descending order until a connection is successful.
Virtual private network (VPN) connections can't be reordered, because they always take priority over other connections.
Click OK, then click Apply to make the updated service order active.

How to prevent a network service from being used

By default, the location named Automatic makes all available network services (also known as ports or network interfaces) active, whether or not they are being used to connect to a network. Your Mac automatically searches these services for a network or Internet connection. For example, you might use a Wi-Fi network at home but an Ethernet network at work. Your Mac automatically detects which of these network services to use when it connects.

If you want to make sure that your Mac doesn't use a particular network service, such as Wi-Fi, you can make that service inactive in any of your network locations:

Choose Apple menu > System Preferences, then click Network.
Use the Location menu to choose the location you want to modify.
Click below of the list of services, then choose Make Service Inactive.
Click Apply.

Scanning for IP address lets you have better control over your network. With 1-2 commands, you can quickly map out the devices in your network and the IP addresses that they are using. But to understand how to scan a network, first, you need to understand how are IP addresses assigned.

DHCP (Assigning IPs Dynamically)

An automated process in networking, called DHCP (Dynamic Host Configuration Protocol), assigns IP dynamic addresses to hosts as soon as they enter the network. In a home or small network, the DHCP server is usually a part of the router. When you come into the network, the router will look for an available IP address in its pool and assign it to you, so that your device can communicate with others without any conflict.

Dynamic allocation of IP addresses is a great advantage for both end-users and network admins. But sometimes you would need to have some control in order to manage and troubleshoot your network more efficiently.

What will you learn in this Tutorial

In this tutorial, you will learn the basic networking skills on how to scan a network for IP addresses. We will scan a network with native OS commands, find which addresses were assigned dynamically, which statically, and test their connectivity.

In the end, we will compare some IP address scanning tools that can give you additional information. To improve your IP addressing insights, even more, we will show you some tools that allow you to track IP addresses and even manage them.

Simple IP Scanning

Operating Systems, like Windows and Linux, come with their own native simple networking set of tools. Commands such as “ipconfig”, “arp -a”, or “ping” allow simple scanning and troubleshooting.

The simplest way to get a quick list of IP addresses and their devices connected to your network is with those OS native commands found in the command line. With a list of the assigned IP address and their devices, you can easily find the devices that are causing the most problems.

1. ipconfig
  This command displays all network settings assigned to one or all adapters in the computer. You can find information such as your own IP, subnet, and Gateway. For Linux and MacOS is “Ifconfig”.
2. arp -a
  When you issue the “arp -a”, you’ll get IP-address-to-mac conversion and the allocation type (whether dynamic or static) of all devices in your network.
3. Ping
  It helps determine connectivity between two hosts and find the IP address of a hostname.

Reading The Output

Finding your own network adapter configuration

In the following screenshot, you’ll see the output from the ipconfig command. On a Windows, the ipconfig command can be entered through the Command line.

Go to Run > type cmd > type ipconfig

This Windows computer has 5 network adapters, but the last one (Wireless LAN adapter Wi-Fi) is the only one connected to a network. The rest are disconnected.
In this network, the router (or Default Gateway) is playing the role of the DHCP server. It is assigning the IP address dynamically and giving access to the Internet.
You are reading two of the most important IP addresses for your device; Your own device’s IP (IPv4 and IPv6) and your Gateway. The Subnet Mask is also very important, it shows that you are on the same subnet as the gateway.

Now you know your subnet, which in this case is 192.168.1.0/24 (using the CIDR range). Now you need to find the rest of the IP address in your network.

Scanning your Network

The job of the ARP protocol is to

Networking For Mac