Infoblox announced this afternoon that it's acquired security vendor IID for $45 million in cash.

Infoblox plays in a space it's calling DDI — DNS, DHCP, and IP addresses, the rudiments of network connectivity. By offering the software that handles those services, Infoblox thinks it has a good vantage point for spotting attacks and anomalies. Hence the company's ongoing interest in security.

Infoblox is buying IID not because its initials are weirdly the opposite of DDI, but because IID provides context to the firehose of available network data. IID's ActiveTrust is a big-data platform that also includes Dossier, a feature that collects current threat intelligence from multiple sources.

The companies have already been collaborating on a quarterly report called the "Infoblox DNS Threat Index."

Separately, Infoblox announced this afternoon that revenues for its second quarter, ended Jan. 31, will be higher than expected: $95 million to $96 million, as opposed to the $93 million to $95 million that Infoblox had previously predicted.