1 In this example, we will see how to download multiple files from URL showing download progression bar using Android progress dialog. 2  We will show Android progress bar which runs while the app downloads images from the web. 3  Once all the images are downloaded, we will display the list of images.
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network and to measure the round-trip time for messages sent from the originating host to a destination computer and back.he following is the output of running ping under Linux for sending five probes to the target host www.example.com: The utility summarizes its results after completing the ping probes. The shortest round trip time was 9.674 ms, the average was 10.968 ms, and the maximum value was 11.726 ms.
As per RFC 792, ICMP or Internet Control Message Protocol Ãuses the basic support of IP as if it were a higher level protocol, however, ICMP is actually an integral part of IP, and must be implemented by every IP moduleÃ. Network Layer is the Layer 3 of the OSI Model. One of Layer 3s functions is internetworking which involve logical addressing or Internet Protocol Addressing. Ping differs with ICMP as ping or Packet Internet Groper is a utility (Application, Layer 7) used for testing connectivity between internetworked devices. ICMP message types (echo reply, destination unreachable, etc.) are what ping utility uses to determine reachability of a target host. (http://tools.ietf.org/html/rfc792)