Addressability is the ability of a digital device to individually respond to a message sent to many similar devices. Examples include pagers, mobile phones and set-top boxes for pay TV. Computer networks are also addressable via the MAC address on Ethernet network cards, and similar networking protocols like Bluetooth. This allows data to be sent in cases where it is impractical (or impossible, such as with wireless devices) to control exactly where or to which devices the message is physically sent.
In the case of simple hardware devices like the pager, the address is simply the electronic serial number (and later IMEI/MEID) in its firmware, or physically manufactured into its circuitry. In the case of GSM mobile phones, it also includes the subscriber identity module, which is also present as a smart card on satellite TV receivers, or a different PCMCIA CableCARD for cable TV. Addressing and encryption are used together for conditional access to different TV channel bundles which a pay-TV customer has or has not paid for.
Addressing is also done in software at higher levels such as IP addresses, which can be dynamically allocated. Even physically separate devices are now addressable, such as to enforce revocation lists for digital restrictions, or to use the former DIVX DVD video rentals, although the latter only used its identity to "phone home" for billing purposes.
billing purposes. Addressable Systems or Addressability for use in cable television Communication Systems are generally known. Addressability is typically...
An Internet Protocol address (IP address) is a numerical label such as 192.0.2.1 that is assigned to a device connected to a computer network that uses...
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Addressable may refer to an address. Alternatively it could refer to one of the following: Addressability, the ability of a digital device to individually...
A MAC address (short for medium access control address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address...
email address identifies an email box to which messages are delivered. While early messaging systems used a variety of formats for addressing, today...
In computing, a logical address is the address at which an item (memory cell, storage element, network host) appears to reside from the perspective of...
Network address translation (NAT) is a method of mapping an IP address space into another by modifying network address information in the IP header of...
zero, one, or more than one physical address. Addressability Flat memory model Namespace Virtualization "IPv4 Address Space Registry". Internet Assigned...
a base address is an address serving as a reference point ("base") for other addresses. Related addresses can be accessed using an addressing scheme....
An Internet Protocol version 6 address (IPv6 address) is a numeric label that is used to identify and locate a network interface of a computer or a network...
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Addressing modes are an aspect of the instruction set architecture in most central processing unit (CPU) designs. The various addressing modes that are...
physical address (also real address, or binary address), is a memory address that is represented in the form of a binary number on the address bus circuitry...
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Byte addressing in hardware architectures supports accessing individual bytes. Computers with byte addressing are sometimes called byte machines, in contrast...
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address register (MAR) is the CPU register that either stores the memory address from which data will be fetched to the CPU registers, or the address...
A bounce address is an email address to which bounce messages are delivered. There are many variants of the name, none of them used universally, including...
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