Blue CAT5E shielded molded boot ethernet patch cables for gigabit ethernet networking in length from 1 foot to 100 feet. The term "shielded" comes from the molded boot attached to the RJ-45 connector at the end of the cable. This boot also has a "bubble" which covers the tip of the RJ-45 locking mechanism. This reduces the possibility of snagging well routing these cables through busy data racks and wiring closets. These cables are great for interconnecting network devices such as Cisco firewalls, routers, EMC and Net App storage, and of course IP telephony handsets. The same cables are in use at fortune 500, the US military, government and educational facilities the world over.