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Statements

Subject Item
dbr:Address_space
rdfs:label
Address space
rdfs:comment
In computing, an address space defines a range of discrete addresses, each of which may correspond to a network host, peripheral device, disk sector, a memory cell or other logical or physical entity. For software programs to save and retrieve stored data, each datum must have an address where it can be located. The number of address spaces available depends on the underlying address structure, which is usually limited by the computer architecture being used. Often an address space in a system with virtual memory corresponds to a highest level translation table, e.g., a segment table in IBM System/370.
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dbr:Page_(computer_memory) dbr:Namespace n4:CNFTL9.JPG dbr:Domain_Name_System dbr:Filename dbr:Computer_network dbr:Virtual_memory dbr:File_system dbr:Link_layer dbr:IP_address dbr:Parallel_ATA dbr:Logical_block_addressing dbr:CPU_cache dbr:Virtualization dbr:URL dbr:Computer_data_storage dbr:Interval_(mathematics) dbr:Flat_memory_model dbr:Cylinder-head-sector n5:370 dbr:Expansion_card dbr:Volume_(computing) dbc:Data_management n4:Virtual_address_space_and_physical_address_space_relationship.svg dbr:Physical_address dbr:Array_data_structure dbr:Address dbr:Logical_disk dbr:Total_order dbr:Map_(mathematics) dbr:Memory_segmentation dbr:Memory_address dbr:Network_address_translation dbc:Computing_terminology dbr:Host_(network) dbr:Arborescence_(graph_theory) dbc:Computer_architecture dbr:Computer_program dbr:Disk_read-and-write_head dbr:Mathematical_structure dbr:Internet_Assigned_Numbers_Authority dbr:Disk_sector dbr:Directory_structure dbr:Disk_storage dbr:Computer_architecture dbr:Address_Resolution_Protocol dbr:Track_(disk_drive) n15:O dbr:Addressability dbr:Memory_paging dbr:Addition dbr:Local_area_network dbr:Random-access_memory dbr:Computing dbr:Peripheral dbr:Virtual_address_space dbr:Internet dbr:Disk_controller
dbo:abstract
In computing, an address space defines a range of discrete addresses, each of which may correspond to a network host, peripheral device, disk sector, a memory cell or other logical or physical entity. For software programs to save and retrieve stored data, each datum must have an address where it can be located. The number of address spaces available depends on the underlying address structure, which is usually limited by the computer architecture being used. Often an address space in a system with virtual memory corresponds to a highest level translation table, e.g., a segment table in IBM System/370. Address spaces are created by combining enough uniquely identified qualifiers to make an address unambiguous within the address space. For a person's physical address, the address space would be a combination of locations, such as a neighborhood, town, city, or country. Some elements of a data address space may be the same, but if any element in the address is different, addresses in said space will reference different entities. For example, there could be multiple buildings at the same address of "32 Main Street" but in different towns, demonstrating that different towns have different, although similarly arranged, street address spaces. An address space usually provides (or allows) a partitioning to several regions according to the mathematical structure it has. In the case of total order, as for memory addresses, these are simply chunks. Like the hierarchical design of postal addresses, some nested domain hierarchies appear as a directed ordered tree, such as with the Domain Name System or a directory structure. In the Internet, the Internet Assigned Numbers Authority (IANA) allocates ranges of IP addresses to various registries so each can manage their parts of the global Internet address space.
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