Absolutely, let's continue exploring different types of transmissions within Ethernet networks and how they are used:

Unicast, Multicast, and Broadcast Transmissions:

Unicast Transmission:

• Unicast transmission is when data is sent from one sender to one specific recipient. It's a one-to-one communication.
• At the Ethernet level, a unicast transmission is intended for a single MAC address in the destination field of the Ethernet frame.
• The least significant bit in the first octet of the destination MAC address determines whether it's unicast or multicast/broadcast.

Multicast Transmission:

• Multicast transmission is when data is sent from one sender to a specific group of recipients. It's a one-to-many communication.
• In Ethernet, the least significant bit in the first octet of the destination MAC address is set to 1 for multicast frames.
• Multicast frames are sent to all devices in the same local network segment, but each device decides whether to process the frame based on its configured multicast address list.

Broadcast Transmission:

• Broadcast transmission is when data is sent from one sender to all devices on a local network. It's a one-to-all communication.
• Broadcast is achieved using a special destination MAC address known as the broadcast address, which consists of all "F" characters (FF:FF:FF:FF:FF:FF).
• Ethernet broadcasts are used for purposes like network discovery or announcement of services.

Key Points:

• Unicast: One sender, one recipient. Sent to a specific MAC address.
• Multicast: One sender, multiple specific recipients. Sent to a group of MAC addresses.