On top of normal networking issues, WLAN adds a couple of new challenges, such as Layer 1 (radio frequency [RF]) issues; a set of L2 protocols, such as IEEE 802.11; and the need for agencies to regulate the use of this shared medium, as the authors explain in this excerpt from their book, CCIE Wireless Exam (350-050) Quick Reference. […]

The Cisco Certified Internetwork Expert exam is the qualification exam for the Routing and Switching Lab track. Find out what you can expect to see on the exam and how you can better prepare for it. […]

This chapter covers the layout and workflow of the web user interface used for the administration of the Email Security Appliance (ESA). […]

The Cisco Certified Design Associate exam is an entry-level network design exam that serves as a starting point for CCDP certification. Find out what you can expect to see on the exam and how you can better prepare for it. […]

The Cisco Certified Network Professional Security IPS exam is one of the four exams that must be passed to obtain the Cisco CCNP Security certification. Find out what you can expect to see on this exam and how you can better prepare for it. […]

This chapter provides an overview of the architectural principles and infrastructure designs needed to support a new generation of real-time-managed IT service use cases in the data center. […]

Even if you’ve encrypted and secured your wireless network with Wi-Fi Protected Access (WPA or WPA2), a security hole affecting most wireless routers may make it fairly easy for those with the right tools to hack your network and connect. Eric Geier shows how to prevent this and protect your network. […]

This chapter dissects a firewall’s duties to understand what makes a firewall operate and how it does its job. […]

This article takes a look at some of the most basic network verification commands that can be used on Cisco equipment and discusses the information that can be obtained from these commands. […]

This quick reference covers best practices for the deployment of Cisco Unified Communications Manager as well as an overview of compatible codecs and regions. […]

The AT&T / T-Mobile deal is dead and buried. What does this mean for the telecom industry, and more importantly, what does it mean for you, the consumer? […]

Brad Bowers takes a closer look at the ZigBee protocol, some of the attacks that have been leveraged against it, and the security tools that penetration testers can use. […]

This chapter discusses some of Cisco Unified Customer Voice Portal's well-defined and commonly referenced functional deployment models. […]

This chapter introduces VLSM, including VLSM Concepts and Configuration, Finding VLSM Overlaps, Adding New Subnets to an Existing VLSM Design, and Designing a Subnetting Plan Using VLSM. […]

To help you prepare for the CCNP Security Firewall 642-617 exam, this chapter covers System Time, Managing Event and Session Logging, Configuring Event and Session Logging, Verifying Event and Session Logging, and Troubleshooting Event and Session Logging. […]

This troubleshooting lab has been timed to last for 2 hours and be representative of the format and difficulty of the tasks you are likely to encounter on your CCIE lab exam. […]

This chapter examines a select number of topics on both advance IP addressing and design issues with Border Gateway Protocol (BGP), Enhanced Interior Gateway Routing Protocol (EIGRP), and Open Shortest Path First (OSPF). […]

Will the AT&T / T-Mobile merger end from "death by 1000 cuts" if opposition by the DOJ, FCC, competitors and consumer groups proves insurmountable? If so, what happens next? […]

This chapter provides a detailed overview of how an Infrastructure as a Service (IaaS) service is orchestrated and automated. […]

This chapter covers evaluating and choosing approaches to intrusion prevention and detection. […]