Npm package not installing.

package not installing..............plz help

npm WARN RAHUL No license field.

up to date in 9.797s

C:\Users\RAHUL>npm install -g bootstrap

npm ERR! code ENOTFOUND

npm ERR! errno ENOTFOUND

npm ERR! network request to http://registry.npmjs.org/bootstrap failed, reason:

getaddrinfo ENOTFOUND proxy.www.****.com proxy.www.****.com:****

npm ERR! network This is a problem related to network connectivity.

npm ERR! network In most cases you are behind a proxy or have bad network settin

gs.

npm ERR! network

npm ERR! network If you are behind a proxy, please make sure that the

npm ERR! network 'proxy' config is set properly. See: 'npm help config'

npm ERR! A complete log of this run can be found in:

npm ERR! C:\Users\RAHUL\AppData\Roaming\npm-cache\_logs\2018-10-30T07_05_29_

568Z-debug.log