Sophos Dos DDoS specifics - layer 3 layer 4 layer 7 attacks

Hello,

We are implementing a Sophos firewall to take advantages of some of its features -- DoS being one of them. We were recently asked if the Sophos firewall can protect against layer 3 and layer 4 attacks. I'm not too familiar with DoS, and the setup page doesn't go into much detail. Can anyone elaborate on this topic or have any helpful links with tech specs specific to the Sophos v18 firewall?

Thanks!