Matrix and IC Firewall Question
In the example in the rule book page 227 when Ghost is fighting IC, it has this line:
"Ghost inflicts a DV of 8 (Attack 4 + 4 net hits), which is greater than 7 (IC’s Firewall + 6), meaning it is destroyed."
Also this here for bricking a Comm-Link:
"The commlink suffers a DV of 10 (Attack 4 + 6 hits), which is more its Firewall (3) + 6, resulting in incapacitating damage."
My question here, is where does the +6 that is added to the IC and Comm-link Firewalls come from?
Is this meant to be the Host rating, because this is stated as only being 4 earlier on? I cant seem to see anything that tells you where this comes from.
Thanks.