Network giant Level 3 Communications announced an agreement Monday to acquire CLEC tw telecom for about $5.7 billion in cash and stock, a deal FierceTelecom says immediately enhances its growing enterprise services business. One of the particular strengths tw telecom brings to Level 3 is its on-net fiber footprint. As of the end of the first quarter of 2014, the service provider had nearly 21,000 buildings connected to its fiber network. Also, tw telecom's existing customers will get access to Level 3's "local-to-global" footprint. Today, Level 3 operates network and data centers in more than 60 countries and has a number of global submarine cable networks. FierceTelecom breaks down the whole deal here.