Router operation

A method for compromising midpoint network infrastructure—such as routers—rather than specific computers or networks, to illicitly observe, redirect, tamper with, impede, or in some other way adversely affect network communications.

Source: Cyber Threats to Elections – A Lexicon, Cyber Threat Intelligence Integration Center & Office of the Director of National Intelligence, https://www.dni.gov/files/CTIIC/documents/CTIIC_2018_Lexicon_without_banner_small_file_for_Post.pdf