What do you mean by logical address and physical address?
Logical addresses are generated by CPU during execution whereas physical address refers to location in a physical memory unit (the one that is loaded into memory). Note that users deal only with logical address (virtual address).
What is the difference between logical addressing and physical addressing how they are used in networks for identification?
The basic difference between a logical and physical address is that during program execution, the logical address is created by the CPU, while the physical address refers to a memory location. The address is used as a physical memory location access reference. The physical address is never the recipient.
What is the difference between a logical or virtual memory address and a physical memory address?
Physical Address: The address of where something is physically located in the RAM chip. Logical/Virtual Address: The address that your program uses to reach its things. It’s typically converted to a physical address later by a hardware chip (mostly, not even the CPU is aware really of this conversion).
Which is a logical address?
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 an executing application program. A logical address may be different from the physical address due to the operation of an address translator or mapping function.
Is logical address same as IP address?
IP Address works at the network layer of OSI model (actually the IP layer of TCP/IP model). This is a logical address (and not the embedded hardware address) which is assigned by the Network administrator or Internet service provider. Hence IP address may change each time you connect with the Internet.
Why do we need logical address?
Logical address is used to reference to access the physical memory location. A logical address is generated so that a user program never directly access the physical memory and the process donot occupies memory which is acquired by another process thus corrupting that process.
Why do we use both logical and physical addresses?
The hardware device called Memory-Management Unit is used for mapping logical address to its corresponding physical address. Physical Address identifies a physical location of required data in a memory. The user never directly deals with the physical address but can access by its corresponding logical address.
Is IP address logical or physical?
An IP address is a logical address that is assigned by software residing in the router or server, and that logical address can change from time to time. For example, a laptop is likely to be assigned a new IP when it starts up in a different hotspot (see DHCP).
Is a logical address the same as a virtual address?
The logical address is virtual address as it does not exist physically, therefore, it is also known as Virtual Address. This address is used as a reference to access the physical memory location by CPU. The term Logical Address Space is used for the set of all logical addresses generated by a program’s perspective.
What is logical address example?
The logical address space is the range of logical addresses that can be generated by a process running on the CPU. For example, on a machine that uses 16-bit addresses in its instructions, the logical address space would be 0 .. 65535.
What is the use of logical address?
What is another name for a logical address?
The logical address is also called virtual address as the logical address does not exist physically in the memory unit. The physical address is a location in the memory unit that can be accessed physically.
What’s the difference between physical address and logical address?
The set of all physical addresses corresponding to the logical addresses in a Logical address space is called Physical Address Space. The basic difference between Logical and physical address is that Logical address is generated by CPU in perspective of a program. On the other hand, the physical address is a location that exists in the memory unit.
How are logical addresses generated in a computer?
Logical address:- Logical address generated by the CPU . when we are give the problem to the computer then our computer pass the problem to the processor through logical address , which we are not seen this address called logical address . An address generated by the CPU is commonly referred to as a logical address.
Where is the physical address in the address space?
The address space consists of the set of all logical addresses. These addresses are generated by CPU with reference to a specific program. The user has the ability to view the logical address of a program. The user can use the logical address in order to access the physical address. This address is a location in the memory unit.
What are the benefits of using logical addresses?
I can see one benefit. Using logical addresses gives more freedom to the applications. If the physical addresses were hard coded, then the program success would depend heavily on the physical computer machine, available RAM addresses etc.