adverb
indeed
in-DEED/ɪnˈdiːd/
Adds emphasis to or confirms a statement.
The visitor confirms that the homegrown pumpkin is indeed enormous.
Etymology
A deed is something done, and the phrase “in deed” meant “in fact” or “in reality.” That appeal to actuality survives in the adverb’s use to emphasize that a statement is true.
In context
in the sentence how to effectively stop dos and cyber attacks there is indeed a split infinitive of course that that much we know