What are valid multicast addresses?
The IP address that defines a multicast group is a Class D address (224.0. 0.0 to 239.255. 255.255). Multicast addresses cannot be used as source addresses for any traffic.
Which of the following protocol is used to help IP in multicast?
User Datagram Protocol (UDP)
The most common transport layer protocol to use multicast addressing is User Datagram Protocol (UDP). By its nature, UDP is not reliable—messages may be lost or delivered out of order.
How is reliability achieved in IP?
Since both IP multicast and UDP are unreliable protocols, the reliability is achieved by running an end to end reliable protocol at the application level. We use a framing protocol like the one suggested in [2] for exchanging state information through application layer headers.
Is IP Multicasting beneficial?
Multicasting can be a good alternative to broadcasting in some scenarios like when a client needs a bootstrap server to boot-up. Generally it is done by sending broadcast packets but this results in packet processing by those hosts also that do not provide this service.
Is IP multicast reliable?
Since both IP multicast and UDP are unreliable protocols, the reliability is achieved by running an end to end reliable protocol at the application level.
What is difference between PIM and IGMP?
IGMP snooping allows a device to only forward multicast streams to the links on which they have been requested. PIM Sparse mode requires specific designated routers to receive notification of all streams destined to specific ranges of multicast addresses.
What is the IP address range for multicasting?
Multicasting has its own Class D IP addressing scheme, controlled and assigned by the Internet Assigned Numbers Authority (IANA). This means that all IP multicasts are in the range of 224.0.0.0 to 239.255.255.255.
What is the difference between multicast and unicast IP packets?
The only difference between a multicast IP packet and a unicast IP packet is the presence of a “group address” in the Destination Address field of the IP header. Instead of a Class A, B, or C IP address, multicasting employs a Class D destination address format (224.0.0.0- 239.255.255.255).
What is scoped multicast range?
Scoped Multicast Range are the Private block of Multicast Address Range between 239.0.0.0 and 239.255.255.255. They are like Private IP address and they can be used only within the network, not globally on internet. You can reach the whole Multicast addresses assigned by IANA below:
What is the range of IPv4 multicast forwarding?
In IPv4, that range is 224.0.0.0/4 (224.0.0.0 – 239.255.255.255). Any packet that’s addressed to one of these IP addresses is automatically assumed to be a multicast, and is delivered according to the multicast forwarding tables in the router (or dropped if there’s no known multicast recipient for this group, or if multicast isn’t configured).