What is the relationship between an IP address and a MAC address?

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What is the relationship between an IP address and a MAC address?

MAC address is assigned by the manufacturer of the hardware interface while the IP address is assigned by the network administrator or Internet Service Provider (ISP). Mac address defines the devices identity, but IP address describes how the devices are connected to the network.

Why do we need to have an IP address if the MAC address can represent the device uniquely?

Computer A could potentially learn the IP Address of Computer 2. And that’s why computers have both MAC Addresses and IP Addresses. MAC Addresses handle the physical connection from computer to computer while IP Addresses handle the logical routeable connection from both computer to computer AND network to network.

What are the limitations of MAC addresses?

Limitation of MAC addresses

  • 2^48 mac addresses is enough for every single person on the planet (assuming 7 billion) to have about 40,000 network cards.
  • Actually, MAC addresses must only be unique on the LAN where the host with that MAC address is.
  • Can there be two computers with same mac across the whole world?
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What is the purpose of a MAC address?

A media access control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth.

Why do we use MAC addresses?

Wireless access points often use MAC addresses for access control. They only allow access for known devices (MAC address is unique and identifies devices) with the correct passphrase. DHCP servers use the MAC address to identify devices and give some devices fixed IP addresses.

What are advantages and disadvantages of Mobile IP?

The most important advantage of mobile IP is that it allows the communication of a mobile host with remote host even if the mobile host is in the foreign network. The disadvantage of mobile IP is, it seems to be inefficient due to the extra distance that a message has to travel.

What are the advantages and disadvantages of IP communication?

Advantages and Disadvantages of the TCP/IP Model

  • It is an industry–standard model that can be effectively deployed in practical networking problems.
  • It is interoperable, i.e., it allows cross-platform communications among heterogeneous networks.
  • It is an open protocol suite.
  • It is a scalable, client-server architecture.
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Why is a MAC address important?

The MAC address is an important element of computer networking. MAC addresses uniquely identify a computer on the LAN. MAC is an essential component required for network protocols like TCP/IP to function. Computer operating systems and broadband routers support viewing and sometimes changing MAC addresses.

What are the advantages of MAC spoofing?

Changing the assigned MAC address may allow the user to bypass access control lists on servers or routers, either hiding a computer on a network or allowing it to impersonate another network device. MAC spoofing is done for legitimate and illicit purposes alike.

What are the drawbacks of MAC address filtering?

MAC Address Filtering Provides No Security But MAC addresses can be easily spoofed in many operating systems, so any device could pretend to have one of those allowed, unique MAC addresses. MAC addresses are easy to get, too.

What is a benefit of a static constant MAC address?

You can control access to an interface on your Firebox by computer hardware (MAC) address. This feature can protect your network from ARP poisoning attacks, in which hackers try to change the MAC address of their computers to match a real device on your network.

What if the MAC address does not exist in the ARP?

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If the address exists in the ARP cache then the MAC address in the table will be used. If the address does not exist in the ARP cache, then an ARP request must be created and sent out.

How do the MAC and IP addresses interact?

How do the MAC and IP addresses interact? There is another protocol called ARP which stands for Address Resolution Protocol. It is used to associate MAC addresses with IP addresses and is a way for a computer to look up an unknown MAC address for a device that it wants to communicate with.

How many MAC address prefixes are there in the database?

There are more than 43K mac address prefixes in the database. For each search, you will always have the most accurate manufacturer, vendor or organization data, without having to worry about updating a database. The pubblic Rest API is free.

What is addressaddress Resolution Protocol (ARP)?

Address Resolution Protocol is an application that seeks to find an IP address on the local Ethernet segment. It essentially just wants to find out which local MAC address has a certain IP address and it never gets routed so it never needs an IP address. That means it is never put into an IP envelope – or packet.