Deployments of voice over IP (VoIP) networks continue at a rapid pace. Voice gateways are an essential part of VoIP networks, handling the many tasks involved in translating between transmission formats and protocols and acting as the interface between an IP telephony network and the PSTN or PBX. Gatekeepers and IP-to-IP gateways help these networks scale. Gatekeepers provide call admission control, call routing, address resolution, and bandwidth management between H.323 endpoints including Cisco IOS voice gateways and Cisco Unified CallManager clusters. IP-to-IP gateways allow VoIP calls to traverse disparate IP networks.

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The second edition of Cisco Voice Over IP (CVoice) provides readers with all the critical information needed to implement and support data and voice integration solutions at the network-access level. In addition, this book prepares the reader for the CVoice certification exam 642-432, which applies to multiple Cisco IP Telephony Specialist certifications and the Cisco Certified Voice Professional (CCVP) certification.

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This book provides the first industry-oriented, comprehensive coverage on DWDM network designs and engineering solutions. There is no one source that explains the details of designing/building a DWDM network from the ground up. DWDM Network Designs and Engineering Solutions is an all-out practical approach that teaches the reader new technologies and ways to plan, design and build their networks in a real time environment. Each chapter begins familiarizing the reader with new technologies and then helps implement the same in practical, real-world case studies. This book enables network designers to tap the huge bandwidth offered by the fiber to the fullest and makes the vision of an Optical Internet come true.

- Best-practice QoS designs for protecting voice, video, and critical data while mitigating network denial-of-service attacks
- Understand the service-level requirements of voice, video, and data applications
- Examine strategic QoS best practices, including Scavenger-class QoS tactics for DoS/worm mitigation
- Learn about QoS tools and the various interdependencies and caveats of these tools that can impact design considerations
- Learn how to protect voice, video, and data traffic using various QoS mechanisms
- Evaluate design recommendations for protecting voice, video, and multiple classes of data while mitigating DoS/worm attacks for the following network infrastructure architectures: campus LAN, private WAN, MPLS VPN, and IPSec VPN

Design and deploy high availability IP and MPLS network architectures with this comprehensive guide!
- Includes a detailed overview of the IP/MPLS forwarding and control plane protocols, including OSPF, IS-IS, LDP, BGP, and RSVP
- Analyze fault-tolerant IP/MPLS control plane architectures with the explanations in this book
- Develop a clear understanding of various high availability aspects of IP/MPLS networks
- Learn how to seamlessly deploy IP/MPLS control plane restart mechanisms
- Master the application of fault-tolerant control-plane architectures in designing and deploying highly reliable and available MPLS applications, such as traffic engineering, L2VPNs, and L3VPNs
- Understand the layered architecture of network-level fault recovery mechanisms, such as optical, SONET, MPLS, and interactions between different layers

Learn about the technologies that drive fast broadband access in the first mile and master the design of first mile access networks
- Understand the motivating forces behind first mile access networks and learn about the technology and business requirements for first mile access solutions
- Master the design of passive optical networks (PON)
- Build EPON solutions and differentiate them from BPON and GPON
- Enhance bandwidth capacity in the access area using CWDM technology
- Learn about and design DSL and power-line communication (PLC) networks
- Discover the use of WiFi in the first mile and study the subsystems involved in a WiFi solution
- Learn the importance of management in first mile access networks and create a business case for diverse first mile access networks

As a network administrator, auditor or architect, you know the importance of securing your network and finding security solutions you can implement quickly. This succinct book departs from other security literature by focusing exclusively on ways to secure Cisco routers, rather than the entire network. The rational is simple: If the router protecting a network is exposed to hackers, then so is the network behind it. Hardening Cisco Routers is a reference for protecting the protectors. Included are the following topics:
- The importance of router security and where routers fit into an overall security plan
- Different router configurations for various versions of Cisco's IOS
- Standard ways to access a Cisco router and the security implications of each
- Password and privilege levels in Cisco routers
- Authentication, Authorization, and Accounting (AAA) control
- Router warning banner use (as recommended by the FBI)
- Unnecessary protocols and services commonly run on Cisco routers
- SNMP security
- Anti-spoofing
- Protocol security for RIP, OSPF, EIGRP, NTP, and BGP
- Logging violations
- Incident response
- Physical security

Design, build, and operate integrated gateway routing systems
- Learn how to design, build, and administer integrated gateway routing systems
- Identify the advantages and disadvantages of Cisco/UNIX integrated designs
- Review lab exercises throughout the book that bring concepts to life
- Encounter the fascinating world of dynamic UNIX routing and TCP/IP stacks
- Understand the way forwarding and signaling are implemented in the UNIX world
- Gain proficiency with tunnels and VPNs
- Utilize advanced features such as high availability, NAT, bandwidth management, policy routing, and multicast architectures
- Explore Linux and BSD networking concepts

IP multicast is rapidly coming of age: its principles are solid, its protocols are being finalized, and it is increasingly being implemented in real-world ISP and enterprise networks. Now, a team of Juniper Networks IP multicast experts have written the most authoritative and up-to-date guide to IP multicast implementation.