Learn more, earn more with Linux certification!The Sair Linux and GNU Certification program, designed and developed by the industry-leading members of Sair Linux and GNU, Inc. and its advisory board, provides you with a clear path for improving your Linux and GNU skills and knowledge base with the ONLY official guides. This new series of books will help you gain the necessary tools to become Linux and GNU certified, which can lead to more job opportunities and a higher salary! Level I concentrates on the areas of expertise which must be mastered to become a Sair Linux and GNU Certified Administrator (LCA). In this official guide, the Sair Linux and GNU Certification team draws upon their years of experience to provide expert advice and guidance on the implementation and maintenance of Linux enterprise networks and how to keep them working at top speed. With the help of detailed lab exercises, they walk you step-by-step through all areas you'll need to know in order to pass the certification exam, including theory of operation, base system, shells and commands, system utilities, applications, and troubleshooting. Plus, they provide 100 sample test questions to help you prepare for your exam. The third of four study guides for the LCA certificate, this book will help you:

• Learn the differences between network implementations, from LANs to the Internet
• Work with network addressing, protocols, and Domain Name Service (DNS)
• Perform congestion and flow control and calculate bandwidth
• Set up network interfaces and routing mechanisms, from T1/ISDN to Ethernet
• Configure firewalls, private networks, and VPNs
• Install new software and hardware devices on your network
• Use the appropriate commands to run Web servers and applications
• Provide services such as Telnet, FTP, news, and mailing lists
• Solve a variety of networking problems, from unreachable hosts to unresponsive printers