Data processing

A system for use in processing data in a packet-switched network, the system comprising:

• at least one memory including computer program code;
• and
• at least one processor in data communication with the memory, wherein the processor is configured to, at a first device in the network:
• transmit an echo request packet into the network, the echo request packet comprising a predetermined identifier;
• receive an echo response packet from a second device in the network;
• and
• in response to the received echo response packet comprising the predetermined identifier:
• identify the received echo response packet as a packet generated on the basis of an echo request packet originated from the first device;
• and
• determine an Internet Protocol (IP) address comprised in the received echo response packet to be an IP address of the second device.

A non-transitory computer-readable storage medium having computer readable instructions stored thereon, wherein, when executed by a processor, cause a computing device to perform a method for processing data in a packet-switched network, the method comprising, at a first device in the network:

• transmitting an echo request packet into the network, the echo request packet comprising a predetermined identifier;
• receiving an echo response packet from a second device in the network;
• and
• in response to the received echo response packet comprising the predetermined identifier:
• identifying the received echo response packet as a packet generated on the basis of an echo request packet originated from the first device;
• and
• determining an Internet Protocol (IP) address comprised in the received echo response packet to be an IP address of the second device.