Description:------------【The origin of APP】----------
In development, you often encounter problems with the interface (DNS resolution error, etc.), so you need to detect whether the mobile terminal to the server's network is not connected, so you need to interrupt ping on the mobile phone. That's why I developed this app.
'UNetState Pro' provides network information,Ping,TCP Ping,traceroute(UDP&ICMP protocol),Local&Custom DNS parsing,LAN scan and other practical functions,which are easy to use!
So whether you are a student, a network engineer, a programmer, a network operation and maintenance staff, this app is a very useful helper for you, it will help you solve problems easily and smoothly!
ping (Packet Internet Groper), an Internet packet explorer, a program for testing network connectivity. Ping sends an ICMP; echo request message to the destination and reports whether the desired ICMP echo (ICMP echo response) is received. It is a command used to check whether the network is unblocked or the speed of the network connection.
Many times, we need to test the TCP port. Although the ping command works well, it cannot test the port. Because ping is based on the ICMP protocol and belongs to the IP layer protocol, it cannot test the TCP / UDP port of the transport layer. For TCP PING, it is a supplement to Ping. We use it to test whether the host port is connected when the Ping fails.
Through traceroute we can know the routing path of network packets from your computer to the host at the other end.
In the UDP-based implementation, the data packets sent by the client are transmitted through the UDP protocol, using a port number greater than 30,000. When the server receives this data packet, it will return an ICMP error message that the port is unreachable. The client determines whether the data packet reaches the target host by judging whether the received error message is a TTL timeout or the port is unreachable.
UDP traceroute is invalid in some cases. For example, if the server processes UDP packets, the traceroute using UDP protocol will fail. So we use ICMP packets instead of UDP packets to send in IP packets, and analyze the ICMP packets and other related values in the returned IP data packets. This prevents our traceroute packets from being dropped by the server's firewall policy wall
Parsing domain name use local DNS.
Use third-party DNS servers parse domain name. Google DNS service 184.108.40.206 is added by default in the app. You can also add other DNS services in the settings.
7. LAN Scan:
Quickly and accurately scan the IP of all active devices in the local area network. These devices include mobile phones, computers, printers and other networkable devices.
Display local&cellular &public network information.
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