Node.js socket.setMulticastTTL() Method

The socket.setMulticastTTL() is an inbuilt application programming interface of class Socket within dgram module which is used to set or clear the IP_MULTICAST_TTL socket option which helps to specify how many numbers of IP hops that a packet is allowed to travel through the specified multicast traffic.

Syntax:

const socket.setMulticastTTL( ttl )

Parameters: This method takes an integer value representing the number of IP hops that a packet is allowed to travel through the specified multicast traffic.

Return Value: This method does not return any value.

Example 1: Filename: index.js

Output:

UDP String: Hello

Example 2: Filename: index.js

Run the index.js file using the following command:

node index.js

Output:

server listening 0.0.0.0:1234
UDP String: Hello

Reference: https://nodejs.org/dist/latest-v12.x/docs/api/dgram.html#dgram_socket_setmulticastttl_ttl