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A MAC (Media Access Control) address is physical because it physically identifies the NIC (Network Interface Card). When two NIC's talk to each other, they address each other by MAC address. In order for this to work, the NIC's have to be connected to the same physical network. If the two NIC's are on different networks, they must use an intermediary, such as a router or gateway, to proxy the message between networks.
An IP (internet Protocol) address, on the other hand, is logical because it sits at a higher level in the protocol stack. This is similar to the relationship between NetBios, NetBeui, IPX/SPX, etc. - each of those protocols has an address, but they all ride on top of the MAC layer.
There is certainly a relationship, a one-to-one relationship, between an IP address and a MAC address. This relationship is established by the ARP (Address Resolution Protocol) which runs alongside the MAC layer, or sort of in between the MAC layer and the IP layer.
What else can I help you with?
Network layer protocol that obtains the MAC physical address of a host or node and then creates a database that maps the MAC address to the hosts IP logical address?
ARP
What is another name for a logical address?
Mac address.
Which protocol is used to convert logical IP addresses to physical MAC addresses?
Address Resolution Protocol (ARP)ARP is primarily used to translate IP Addresses to Ethernet MAC Addresses.
Is ip address is a physical address?
No an IP address is considered a logical address. Physical address refers to a MAC address which is burned into ROM on each Ethernet network interface card or NIC. In theory every NIC card has a unique physical address which denotes its manufacture and its own unique address. The logical address or IP internet protocol address is used for layer 3 routing between networks and subnets.
What is logical address in computer networks?
logical address is called as global address and physical address is called as local address .the ip address,which is used by the user in the network is found to be global for use and it is easily identified in any network .physical address is mac address ,which is stored in the nic card,which is mainly used ,when the system is connected in the network using switch
Is a MAC address logical?
A MAC address is not considered logical; it is a physical address. It is a unique identifier assigned to network interfaces for communications on a local network segment and is hardcoded into the network hardware. Unlike logical addresses, such as IP addresses, which can change based on the network configuration, MAC addresses remain constant for a device's network interface.
What is the protocol that is used to discover a physical address from a known logical address and what message type does it use?
The protocol used to discover a physical address from a known logical address is the Address Resolution Protocol (ARP). ARP operates by broadcasting an ARP request message on the local network, which contains the known logical address (IP address) and asks for the corresponding physical address (MAC address). The device that owns the requested IP address responds with an ARP reply message, providing its physical address. This process enables devices on the same local network to communicate effectively.
Is ARP the core protocol responsible for logical addressing?
The structure of the question is meant to trick you because 'logical addressing' is being used loosely. Technically, IP is the CORE protocol responsible for logical addressing. ARP is the network layer protocol that is used to discover the identity(physical address) of a machine whose IP address you know. Very briefly, it does this by creating a database that maps the MAC address to the (hosts') logical address provided.
What is the different between mac address and ip address?
MAC address is fixed to the hardware device (for example a network card) and can not be changed. IP address is assignable. The default IP address for a device can be computed by converting the four right-most numbers of the MAC address from hex to decimal.The MAC address refers to the physical address assigned by the Network Interface Card manufacturer. Example - 10.03.d5.f3.45.fc , where are an Internet Protocol address is given to a computer when it gets connected to the network. Its divided into four parts , separated by fullstops.
How logical address is mapped to physical address?
In the 8086/8088, the logical address (or effective address) is mapped to a physical address by adding it to the left shifted by 4 value of a segment register. For example, is the logical address is 1234H, and the segment register's contents is 5678H, the physical address is 1234H + 56780H, or 579B4H.
Why physical address is needed when IP address is present?
Without a physical address, you will not be able to access a network outside the LAN that you are on. This is simply due to the fact that the computer on another LAN would not know where to forward the requested information. Your IP address work on the Internet Protocol within routers and switches, and associates it finding with your local machine (computer) by way of its mac address (physical address). Notice, your computer does not have an IP address, when you log on to the Internet a DHCP server issue you a leased IP address which is associated with your MAC for the duration of time that your computer is log on to the NET. There are quite a few reasons why your computer would not be network operable without a MAC address, this is just one of them.
How does the Address resolution protocol stack map the logical IP address to the physical MAC address on a LAN?
The Mapping is done in the ARP table. C:\Documents and Settings\martin>arp -a Interface: 10.1.1.3 --- 0x6 Internet Address Physical Address Type 10.1.1.1 00-22-b0-8e-94-41 dynamic
