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 The CCNA (Cisco Certified Network Associate) is a certification offered by Cisco Systems, a leading company in networking technologies. The CCNA certification is a globally recognized credential that validates your skills and knowledge in networking and is highly regarded in the IT industry, particularly for those looking to pursue a career in networking.

The CCNA certification has evolved over time, and as of my last knowledge update in September 2021, there were a few different CCNA tracks. The most common track is the CCNA Routing and Switching, which covers fundamental networking topics. However, Cisco has made changes to its certification structure, and they might have introduced new tracks or modified the existing ones. Be sure to check Cisco's official website for the latest information.

Here's an overview of the CCNA Routing and Switching certification content as it existed up until September 2021:

  • Network Fundamentals: Covers basic networking concepts, OSI model, TCP/IP fundamentals, and IPv4 and IPv6 addressing.
  • Routing and Switching Essentials: Focuses on routing and switching technologies, including router and switch configuration, routing protocols like OSPF and EIGRP, VLANs, and inter-VLAN routing.
  • Scaling Networks: Expands on routing and switching concepts, covering topics like WAN (Wide Area Network) technologies, routing between VLANs, and dynamic routing protocols.
  • Connecting Networks: Covers advanced networking topics like network design, cloud computing, security fundamentals, and troubleshooting techniques.

The CCNA certification typically requires passing one or more exams that cover these topics. The exact exam structure might have changed since then, so I recommend checking Cisco's official certification page for the most up-to-date information.

Preparing for the CCNA certification often involves studying networking concepts, practicing with Cisco equipment in lab environments, and using study materials such as textbooks, online courses, practice exams, and Cisco's own resources. Many people also opt for training courses from Cisco's authorized learning partners.