The Domain Name System (DNS) and Dynamic Host Configuration Protocol (DHCP) have become mission-critical services as the Internet and other Internet protocol (IP)-based networks become business necessities. Services like IP telephony are intolerant of down-time—they require “dial tone” reliability and a solution that enables them to remain available despite any of the unforeseen circumstances that can incapacitate a server.
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The greatest threat to the security of the modern network is complexity. Threats to network security almost always play on missed details in the design of a network or a piece of software. These overlooked details enable much larger and potentially devastating security breaches to occur. However, this threat can be countered with a well designed network and vigilant safeguards.
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Dynamic Host Configuration Protocol (DHCP) has been adopted as the dynamic protocol of choice for pain-free management of network resources. The integration of the Domain Name System (DNS) and DHCP into a single network helps overcome traditional barriers to effective resource allocation. Indeed, combining DNS and DHCP enhances information security, thus providing a solution your organization can grow with.
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The Domain Name System (DNS) plays an important role in providing the information used by the Windows Domain locator service to connect and authenticate with Active Directory. But how can organizations with existing configurations using the Berkeley Internet Name Domain (BIND)—the international DNS benchmark—be sure that migration to other server solutions will yield a dependable DNS solution?
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Domain name system (DNS) best practices are becoming more standardized. However, DNS services are often overlooked simply because they are so commonplace. The result is poorly configured services that are either not fully functional, or easily compromised. To ensure that the Internet remains a reliable medium for information and commerce, further implementation of secure and efficient DNS will be required.
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Small to medium businesses have typically built their own domain name system (DNS) and Dynamic Host Configuration Protocol (DHCP) services, used Windows DNS/DHCP, or turned to a hosted service provider for these services. This approach may appear to offer tremendous savings, but contains many hidden costs and risks that are not always apparent until a catastrophic loss of service occurs.
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When Dynamic Host Configuration Protocol (DHCP) was created, the Internet was still mainly a vehicle for scientific collaboration. Indeed, the need for security has grown out of the increased use of the Internet as a commercial medium. That’s why new DHCP issues have come to the forefront that were simply not explored in the early days of the Internet.
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To understand the power of cache poisoning and pharming, imagine that you’re logging on to your Internet banking service. The page looks a little odd, but the address is correct, and it has the same fields as usual. You might enter your credentials without thinking twice. Unfortunately, you’ve just provided a criminal syndicate with the contents of your bank account.
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Voice over Internet protocol (VoIP) technology has become a money-saving telecom option that brings the power of a computer to a user’s phone. VoIP devices, however, require more complicated configurations than the average network client. Indeed, without reliable and properly configured domain name system (DNS) and Dynamic Host Configuration Protocol (DHCP) services running on a network, VoIP services are impossible.
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Organizations deploying next-generation business and communications applications are looking for ways to rapidly increase the use of existing Internet and core network resources. These network environments demand new management frameworks to simplify network configuration and deployment changes. However, existing point-based solutions do little to address issues of scale, usability, security, and network availability at the Internet protocol (IP) level.
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Increased complexity, coupled with the adoption of voice over Internet protocol (VoIP), demands additional management overhead for enterprise- and carrier-class networks. This management need is compounded by requirement for corporations to implement IP version 6 (IPv6)-compatible networks to ensure capacity and service over the next decade. This transition will require careful planning, and naming systems will play a critical role.
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