If you can't take the Cisco exam because your documents are out of date or invalid, you won't be able to enter the test center with expired documents and the exam fee is not refundable, so please bring valid documents to take the exam. You should bring your valid documents to the exam. You should arrive at the exam center half an hour earlier on the day of the exam. Written test can not return to do not do before the topic, do each question to be careful and meticulous, in the point NEXT button do not click quickly and consecutively, so as to avoid the occurrence of even point directly over the situation of a question. Cisco certifications are introduced by Cisco, a renowned vendor in the field of networking. The company launched the Engineer Qualification Program (Cisco Career Certification Program, or CCCP) for network planning and network support of its products, and requires its agents in various countries to have such engineers in order to improve the quality of service to users and to establish a qualification system for network engineers of Cisco products.