Node.js socket.setTTL() Method

The socket.setTTL() method is an inbuilt application programming interface of class Socket within dgram module which is used to set or clear the IP_TTL socket option which helps to specify how many IP hops that a packet is allowed to travel through the specified router or gateway.

Syntax:

const socket.setTTL( ttl )

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

Return Value: This method does not return any value.

Example 1: Filename: index.js

Output:

UDP String: Hello

Example 2: Filename: index.js

Output:

server listening 0.0.0.0:1234
UDP String: Hello

Run the index.js file using the following command:

node index.js

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