This volume covers Cisco Exam 640-407, the exam that represents the middle tier of Cisco certification. It prepares candidates for the exam objectives, including the OSI model, Cisco IOS software, IP routing protocols, VLAN, basic traffic management, and IP configuration. More than 420 questions are organized by topic and sprinkled with exam tips and notes. Two full practice exams (of 70 questions each) are included and designed to mimic the actual exam. Not all the questions are multiple choice - most are of the situational type. These scenario-based questions are tabbed within the textbook so that they can be looked up quickly.