The Wireshark WCNA exam covers a range of essential networking concepts and skills, including network protocols, packet analysis, and troubleshooting techniques. You'll delve into the world of Ethernet, exploring its frame structure and various types like VLAN and jumbo frames. Understanding IP addressing and subnetting is crucial, as you'll need to configure and troubleshoot IP networks effectively. The exam also emphasizes the importance of network security, covering topics like encryption, authentication, and access control. Additionally, you'll learn about routing protocols, such as OSPF and BGP, and their role in directing network traffic. TCP and UDP, the two main transport layer protocols, are also key subjects, as they enable reliable and efficient data transmission. Wireshark, a powerful network analysis tool, is a central focus, as you'll use it to capture, filter, and analyze network packets. Finally, you'll explore network topologies, such as star, bus, and mesh, and understand their advantages and limitations.