8-8

DHCP Server Operation

deny unknown-clients;

The unknown-clientsflag is used to tell the DHCP server whether or not to dynamically assign addresses to unknown clients. Dynamic address assignment to unknown clients is allowed by default.

bootp

allow bootp; deny bootp;

The bootp flag is used to tell the DHCP server whether or not to respond to BOOTP queries. BOOTP queries are allowed by default.

booting

allow booting; deny booting;

The booting flag is used to inform the DHCP server whether or not to respond to queries from a particular client. This keyword only has meaning when it appears in a host declaration. By default, booting is allowed, but if it is disabled for a particular client, then that client will not be able to get and address from the DHCP server.

8.4.4 Parameters

default-lease-time

default-lease-time time;

Time should be the length in seconds that will be assigned to a lease if the client requesting the lease does not ask for a specific expiration time.

max-lease-time

max-lease-time time;

Time should be the maximum length in seconds that will be assigned to a lease if the client requesting the lease asks for a specific expiration time.

hardware

hardware hardware-type hardware-address;

In order for a BOOTP client to be recognized, its network hardware address must be declared using a hardware clause in the host statement. hardware-typemust be the name of a physical hardware interface type. Currently, only the ethernet and token-ring types are recognized. The hardware-addressshould be a set of hexadecimal octets (numbers from 0 through ff) separated by colons. The hardware statement may also be used

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IBM Heritage user manual Parameters

Heritage specifications

IBM, or International Business Machines Corporation, is a global leader in technology and consulting, with a heritage that spans over a century. Established in 1911, IBM initially emerged from a merger of four companies, and it has since evolved into one of the most influential players in the tech industry.

One of the main features of IBM’s legacy is its commitment to innovation. The company has a long history of technological breakthroughs, including the development of the first programmable computer, the IBM 701, in the early 1950s. IBM has also been at the forefront of many pivotal technologies, including mainframe computers, which became central to large-scale enterprise computing. The System/360, introduced in 1964, revolutionized the industry by offering a compatible range of computers that could run the same software, a concept that helped define the standardization of computer systems.

IBM’s contributions to artificial intelligence, particularly through its Watson platform, are another hallmark of its heritage. Watson gained international fame for its success on the quiz show Jeopardy! in 2011, showcasing advanced natural language processing capabilities and machine learning techniques. This technology has since found applications in various fields, from healthcare to finance, significantly transforming data analysis.

Another key characteristic of IBM is its focus on research and development. With an impressive portfolio of patents, IBM consistently ranks among the top patent holders annually. Their research endeavors have led to significant advancements in quantum computing, with initiatives like the IBM Quantum Experience making quantum technologies accessible to developers and researchers.

Sustainability is also a priority for IBM, with programs aimed at promoting environmental responsibility. The company has committed to achieving net-zero greenhouse gas emissions by 2030, reflecting the growing importance of sustainability in technology practices.

In summary, IBM's heritage is characterized by a strong legacy of innovation, technological leadership, and a commitment to addressing contemporary challenges in business and society. From pioneering mainframe systems to leading the charge in AI and quantum computing, IBM continues to shape the future of technology while maintaining a visionary outlook towards a sustainable and inclusive digital world.