Imagine a SMS flood using a few phone numbers. The client blocks the phone numbers using the build in mechanism of the smart phone, and thus does not receive any notifications. Even though the user blocked the messages on his or her cell phone, does the SMS flood still cause a denial of service for SMS messages from other numbers? Or, does the blocking completely prevent the flood from those numbers from causing any harm? How does this work?
From an IP perspective, a few servers can take down a single server, especially a home connection. Even when the packets are blocked with IPTables, the service is still completely unreachable because it's flooded at the network layer. I know that SS7 is very different..For one thing, it's connection based, instead of packet based.