Computer Networks - What is the difference between physical address and logical address?

GeekInterview.com > Interview Questions > Networking > Computer Networks

Go To First | Previous Question | Next Question

Computer Networks | Question 86 of 201

What is the difference between physical address and logical address?

Total Answers and Comments: 9

Last Update: June 02, 2008 Asked by: viswanath

Sponsored Links

Best Rated Answer

—

Submitted by: kalyan raghavan

A Physical address is a 48-bit flat address burned into the ROM of the NIC card which is a Layer1 device of the OSI model. This iis divided into 24-bit vendor code and 24-bit serial address. This is unique for each system and cannot be changed.

A Logical address is a 32- bit address assigned to each system in a network. This works in Layer-3 of OSI Model. This would be generally the IP address.

Above answer was rated as good by the following members:
prateek joshi, aman15490, adityawalia9, geekgreek

December 20, 2005 07:03:40

sandeepcheema007

Member Since: December 2005 Contribution: 8

RE: what is the difference between physical address an...

Obtaining a physical address that is ultimately needed to perform an operation. All instructions executing at the machine level require a physical memory storage or network node address when referencing the actual hardware. Machine addresses are derived using table lookups and/or algorithms.In a network a where is? request is broadcast onto the network and the logical address (name) is turned into a physical address (machine number) either by the recipient node or by a router that maintains a list of address translations.This is through ARP.

Is this answer useful? Yes | No

1 0

Overall Rating: +1

December 22, 2005 02:57:25

Sunil

RE: what is the difference between physical address an...

Physical Addres: It Is a physical address that we can't change It is present in NIC Card Given by INTERNIC Organization.

Logical Address: It Can be changed as you like used for assigning a ip address to clients.

Is this answer useful? Yes | No

1 0

Overall Rating: +1

January 23, 2006 05:55:30

kalyan raghavan

RE: what is the difference between physical address an...

A Logical address is a 32- bit address assigned to each system in a network. This works in Layer-3 of OSI Model. This would be generally the IP address.

Is this answer useful? Yes | No

2 0

Overall Rating: +2

February 15, 2006 06:51:50

sanjay

RE: what is the difference between physical address an...

physical address is MAC address of nic and logical address is ip address.

Is this answer useful? Yes | No

May 22, 2006 01:43:25

vaisnave

RE: what is the difference between physical address an...

pysical address is used in main memory.

logical address is used in virtual memory.

Is this answer useful? Yes | No

September 12, 2006 07:16:24

ezgiamen kahsu

RE: what is the difference between physical address an...

the difference between physical and logical address

Is this answer useful? Yes | No

0 1

Overall Rating: -1

January 08, 2007 04:54:10

vmshenoy

Member Since: October 2005 Contribution: 508

RE: What is the difference between physical address an...

physical address also called MAC address.It is present on Network interface cad.It wont change!

Logical addressing is used when a packet passes n/w boundary !

Is this answer useful? Yes | No

1 0

Overall Rating: +1

November 06, 2007 07:42:14

Amol Bawane

RE: What is the difference between physical address an...

Physical Address is nothing but your actual real address like MAC.for that Storage device should be required.Physical Address can't never change It is present in NIC Card.Logical Address is noting but ur IP address which is used to create client.It will change whenever change required.

Thanks
Amol Bawane.

Is this answer useful? Yes | No

1 0

Overall Rating: +1

June 02, 2008 05:11:19

giri_adepu

Member Since: June 2008 Contribution: 5

RE: What is the difference between physical address and logical address?

logical address of yhe any nic card is ip address of the sysytem.in any copmany lan or wan environment for machine to mechine communication each and every mechine required one nomber.thats why ina peoples desizned and interduces one good technologie is ip addressing system.

phisical address of any copmany nic card is also known as a mac address {media accec controler address} mac address mediater bitween cable and mechine. it means mac address main function is transfer the data cable laguage to mechine language anad mechine language to cable language.its a 48 bit address

Is this answer useful? Yes | No

Go To Top

User Name		Remember Me?
Password

Question Bank