How do MAC addresses differ from IP addresses?

MAC addresses and IP addresses serve different purposes in networking and have distinct characteristics:

MAC Addresses:

1. Layer: Operate at the Data Link Layer (Layer 2) of the OSI model.
2. Purpose: Used to uniquely identify devices on a local network.
3. Format: Typically represented as six pairs of hexadecimal digits (e.g., 00:1A:2B:3C:4D:5E).
4. Scope: Local to the network; does not change as a device moves across different networks.
5. Uniqueness: Assigned by the manufacturer, ensuring that each device has a unique MAC address.

IP Addresses:

1. Layer: Operate at the Network Layer (Layer 3) of the OSI model.
2. Purpose: Used to identify devices on a network and facilitate routing of packets across different networks.
3. Format: Can be in IPv4 format (e.g., 192.168.1.1) or IPv6 format (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).
4. Scope: Can change based on the network a device is connected to (dynamic IP addresses) or remain constant (static IP addresses).
5. Uniqueness: Assigned by network administrators or through DHCP, ensuring uniqueness within a specific network.

In summary, MAC addresses are used for local identification and communication, while IP addresses are used for routing and identifying devices across different networks.