CCIE Routing and Switching (CCIE R&S) is the expert level of Cisco certification where certified engineers will get expertise in to plan, operate and troubleshoot the complex Cisco network infrastructures. Prerequisite: To get a CCIE R&S certification there are no prerequisite of any other certification and exams. CCIE Routing and Switching Exams: CCIE R&S Written Exams CCIE R&S Lab Exams CCIE R&S Written Exam: Exam number is 400 - 101 CCIE Exam Duration: 2 Hours Through these exams candidates validates their expertise in to plan, configure and troubleshoot the complex Cisco network infrastructure. In these 2 hours of exam the topics will cover by Network Principles (10%), Layer 2 technologies (13%), Layer 3 technologies (37%), VPN technologies (13%), Network Infrastructure Security (5%), Network Infrastructure services (12%) and Evolving technologies (10%). By see these topics you will understand very well where you should have put your extra prepar...