This is straightforward in many circumstances; for example, an attacker within reception range of an unencrypted wireless access point (Wi-Fi) could insert themselves as a man-in-the-middle.
Isto é sinxelo nalgunhas circunstancias, por exemplo: un atacante dentro do rango de recepción dun punto de acceso inalámbrico non encriptado (Wi-Fi) podería establecer o devandito ataque.