Paper  bibtex   

@misc{kale_tcpip_nodate-1,
	title = {{TCP}/{IP} tutorial},
	url = {https://tools.ietf.org/html/rfc1180},
	language = {en},
	urldate = {2020-05-06},
	author = {Kale, C. J. and Socolofsky, T. J.},
}