Learning IOS and JUNOS

Cisco Certified Internetwork Expert (CCIE) is no longer the highest certification offered by Cisco as it announced today the "Cisco Certified Architect" (CCA) Certifications as the new highest level of accreditation achievable within Cisco Career Certifications. The Cisco Certified Architect (CCA) will attempt to marry the networking engineering know-how of the CCIE with the business acumen of a MBA. The CCA will train candidates to work with C-level line-of-business executives to translate business needs into effective IT systems. "The Cisco Certified Architect designation was developed to meet the demands of global organizations for specialists with the advanced design skills to support increasingly complex networks and effectively translate business strategies into evolutionary architectural implementations," said Jeanne Beliveau Dunn, general manager, Learning@Cisco. "This prestigious certification represents an exclusive group of architects wh...

Active FTP vs. Passive FTP, a Definitive Explanation Contents: Introduction The Basics Active FTP Active FTP Example Passive FTP Passive FTP Example Other Notes Summary References Appendix 1: Configuration of Common FTP Servers Introduction One of the most commonly seen questions when dealing with firewalls and other Internet connectivity issues is the difference between active and passive FTP and how best to support either or both of them. Hopefully the following text will help to clear up some of the confusion over how to support FTP in a firewalled environment. This may not be the definitive explanation, as the title claims, however, I've heard enough good feedback and seen this document linked in enough places to know that quite a few people have found it to be useful. I am always looking for ways to improve things though, and if you find something that is not quite clear or needs more explanation, please let me know! Recent additions to this document include the examples of b...