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Why both physical address is needed for data transfer in a network?
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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.
Why is a mac address sufficient to route traffic locally?
A MAC address is sufficient to route traffic locally on a network because it provides the needed information with regard to the equipment's location. This is true for most level 2 network traffic.
What is a NIC?
A network card, network adapter, network interface card or NIC is a piece of computer hardware designed to allow computers to communicate over a computer network. It is an OSI model layer 2 item because it has a MAC address. Every network card has a unique 48-bit serial number called a MAC address, which is written to ROM carried on the card. Every computer on a network must have a card with a unique MAC address. The IEEE is responsible for assigning MAC addresses to the vendors of network interface cards. No two cards ever manufactured should share the same address. Whereas network cards used to be expansion cards to plug into a computer bus, most newer computers have a network interface built into the motherboard A separate network card is not required unless multiple interfaces are needed or some other type of network is used. The card implements the electronic circuitry required to communicate using a specific physical layer and data link layer standard such as ethernet or token ring. This provides a base for a full network protocol stack, allowing communication among small groups of computers on the same LAN and large-scale network communications through routable protocols, such as IP. There are four techniques used for transfer of data, the NIC may use one or more of these techniques. * Polling is where the microprocessor examines the status of the peripheral under program control. * Programmed I/O is where the microprocessor alerts the designated peripheral by applying its address to the system's address bus. * Interrupt-driven I/O is where the peripheral alerts the microprocessor that its ready to transfer data. * DMA is where the intelligent peripheral assumes control of the system bus to access memory directly. This removes load from the CPU but requires a separate processor on the card. A network card typically has a twisted pair, BNC, or AUI socket where the network cable is connected, and a few LEDs to inform the user of whether the network is active, and whether or not there is data being transmitted on it. The Network Cards are typically available in 10/100/1000 Mbit/s. This means they can support a transfer rate of 10 or 100 or 1000 Mbit/s.
How IP addresses are needed to identify computers on a network and what they look like.?
A typical IP address takes the form of 256.256.256.256 - Each IP address is unique - and identifies a single computer connection.
Which ID will identify all or part of a specific physical link on the subcriber's network which will enable subcriber to create as many subnets as needed?
Subnet ID
Minimum number of address lines needed to access a physical memory of 1GB?
You need 30 address lines to access 1G of memory. 230 = 1,073,741,824. log2 (1,073,741,824) = 30.
What is needed for successful communications between two or more computers or devices to transfer data instructions and information?
a physical hardware linka communication protocol definition
Why the efficient railway network was one of the souths strength?
The railway was an easy way to transport war goods to certain areas when needed. The railroad would transfer troops,weapon and food to a location that needed protection when the North would attack.
What is a NIC card?
A network card, network adapter, network interface card or NIC is a piece of computer hardware designed to allow computers to communicate over a computer network. It is an OSI model layer 2 item because it has a MAC address. Every network card has a unique 48-bit serial number called a MAC address, which is written to ROM carried on the card. Every computer on a network must have a card with a unique MAC address. The IEEE is responsible for assigning MAC addresses to the vendors of network interface cards. No two cards ever manufactured should share the same address. Whereas network cards used to be expansion cards to plug into a computer bus, most newer computers have a network interface built into the motherboard A separate network card is not required unless multiple interfaces are needed or some other type of network is used. The card implements the electronic circuitry required to communicate using a specific physical layer and data link layer standard such as ethernet or token ring. This provides a base for a full network protocol stack, allowing communication among small groups of computers on the same LAN and large-scale network communications through routable protocols, such as IP. There are four techniques used for transfer of data, the NIC may use one or more of these techniques. * Polling is where the microprocessor examines the status of the peripheral under program control. * Programmed I/O is where the microprocessor alerts the designated peripheral by applying its address to the system's address bus. * Interrupt-driven I/O is where the peripheral alerts the microprocessor that its ready to transfer data. * DMA is where the intelligent peripheral assumes control of the system bus to access memory directly. This removes load from the CPU but requires a separate processor on the card. A network card typically has a twisted pair, BNC, or AUI socket where the network cable is connected, and a few LEDs to inform the user of whether the network is active, and whether or not there is data being transmitted on it. The Network Cards are typically available in 10/100/1000 Mbit/s. This means they can support a transfer rate of 10 or 100 or 1000 Mbit/s.
What software is needed for a network?
Physical security is having locks on your doors, security cameras in your building and security guards if needed. This can also include protection from fire, natural disasters, burglary, theft, vandalism and terrorism.
Why is NAT not needed in IPv6?
Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​ smb
What are needed to transfer a gene through a DNA molecule?
Genetics engineering is needed to transfer genes through DNA molecules.
