What is Ethernet multicast?

Ethernet Protocol Multicast addresses allow a source device to send a packet to a group of devices. Devices that belong to a multicast group are assigned a multicast group IP address. The range of IPv4 multicast addresses is 224.0. 0.0 to 239.255.

What is a multicast packet?

Multicast IP Routing protocols are used to distribute data (for example, audio/video streaming broadcasts) to multiple recipients. Using multicast, a source can send a single copy of data to a single multicast address, which is then distributed to an entire group of recipients.

Does multicast use TCP or UDP?

UDP
Unicast uses TCP (Transmission Control Protocol) for communications while Multicast uses UDP (User Datagram Protocol).

How do I get multicast packets?

To receive multicast datagrams sent to a particular port, bind to the local port, leaving the local address unspecified, such as INADDR_ANY. In this case, every incoming multicast or broadcast UDP datagram destined for the shared port is delivered to all sockets bound to the port.

Which protocol is used for multicasting?

Multicasting is UDP-based. A computer uses Internet Group Management Protocol (IGMP) to report its multicast group memberships to multicast routers. IGMP is required to be used in host computers that wish to participate in multicasting.

Can we use TCP for multicast?

No, you can’t. TCP is a protocol for communication between exactly two endpoints.

What are the protocols used in multicast?

Multicast protocols such as UDP/IP and RTP/IP are used to broadcast data to any number of receiving devices. Unlike unicast TCP data, if a packet is not received, there is no mechanism or attempt to verify that and resend the packet. Multicast is widely used for video and audio data.

Do routers forward multicast packets?

Since the MBONE and the Internet have different topologies, multicast routers execute a separate routing protocol to decide how to forward multicast packets.

How are multicast packets routed?

Multicast routing is a networking method for efficient distribution of one-to-many traffic. A multicast source, such as a live video conference, sends traffic in one stream to a multicast group. The multicast group contains receivers such as computers, devices, and IP phones.

What address is used for Ethernet broadcast?

The address FF:FF:FF:FF:FF:FF is used for Ethernet broadcast traffic.