What is a multicast address used for?
What is a multicast address used for?
A multicast address identifies a group of hosts sharing the same address. Multicast addresses are not assigned to a device, rather, a device proceeds to listen for and receive traffic destined to a multicast group that it has joined by some process. Multicasting is UDP-based.
What does a multicast address look like?
Multicast addresses are identified by the pattern “1110” in the first four bits, which corresponds to a first octet of 224 to 239. So, the full range of multicast addresses is from 224.0. 0.0 to 239.255. 255.255.
What port does multicast use?
UDP port 1900
Viewing Multicast Packets On a typical home network there are a variety of protocols that use multicast. The SSDP (Simple Service Discovery Protocol) uses multicast address 239.255. 255.250 on UDP port 1900.
What is an unicast, multicast, broadcast, or anycast?
Anycast. Unicast is the communication that there is only one receiver. This is one-to-one communication. Multicast is the communication that there is one more receiver. Only the members of the multicast group receive the multicast traffic. Broadcast is also the communication that there is one more receiver but this time, all the receivers receive broadcast traffic.
What does multicast mean?
In computer networking, multicast is group communication where data transmission is addressed to a group of destination computers simultaneously. Multicast can be one-to-many or many-to-many distribution. Multicast should not be confused with physical layer point-to-multipoint communication.
What is characteristic of multicast messages?
They are sent to a select group of hosts.
Is multicast possible in TCP?
By now, it should be obvious that multicast traffic is handled at the transport layer with UDP, as TCP provides point-to-point connections, not feasibles for multicast traffic . (Heavy research is taking place to define and implement new multicast-oriented transport protocols.