It depends on the size of the address bus, which is often different than the size of the data bus.
216 = 65,536.
To calculate the virtual address space for a given system, you need to determine the number of bits used for addressing in the system's memory architecture. The virtual address space is typically 2 raised to the power of the number of bits used for addressing, which gives you the total number of unique memory addresses that can be accessed by the system.
A flat address space
Primarily it is being changed because the version 4 address space is now out of addresses for clients and needs a much larger address space for demand (version 6)
An address space is a range of discrete addresses, all of the address locations available in a particular named subset of a computer's memory.
No, it is impossible. The operating system kernel must remain in memory at all times, including the virtual memory manager, thus no single process can physically occupy every address. Indeed, all unused physical memory is allocated to the virtual memory manager. Processes are allocated addresses within the virtual address space but some of those addresses are reserved for system use only. As such, no process can ever use the entire virtual address space let alone the entire physical address space.
The address space of IPV4 is limited to 4294967296 possible unique addresses.
IPv6 address space refers to the vast range of IP addresses available under the Internet Protocol version 6 (IPv6), designed to replace the older IPv4 system. IPv6 uses 128-bit addresses, allowing for approximately 340 undecillion (3.4 x 10^38) unique addresses, significantly expanding the addressable space to accommodate the growing number of devices connected to the internet. This extensive address space is essential for supporting the increasing demand for connectivity in the era of the Internet of Things (IoT) and ensuring that every device can have its own unique address.
This 48-bit address space contains potentially 248 or 281,474,976,710,656 possible MAC addresses.
An address space is a range of discrete addresses, all of the address locations available in a particular named subset of a computer's memory.
The concept of a logical address space is simply involved the process of mapping the Logical addresses to their Physical Addresses . Logical addresses are generated by the CPU; also referred to as virtual addresses.while Physical Address is the actual address of the data stored on the physical device and mapped by MMU.
To reduce congestion & optimize the IP address space.