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Simple IP packets
- All IGMP messages are transported in simple IP packets with the IP protocol number 2 (Hex: 0x02).
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What is IGMP (Internet Group management protocol)?
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The Internet Group Management Protocol (IGMP) is a communications protocol used by hosts and adjacent routers on IPv4 networks to establish multicast group memberships. IGMP is an integral part of IP multicast and allows the network to direct multicast transmissions only to hosts that have requested them.
Mar 21, 2023 · All IGMP messages are transported in simple IP packets with the IP protocol number 2 (Hex: 0x02). The IGMP header of the first protocol version looks like this:
- What Is The Internet Group Management Protocol (Igmp)?
- What Is Multicasting?
- How Does IGMP Work?
- What Types of IGMP Messages Are there?
- What Is IGMP Snooping?
- How Is Multicasting Different in IPv4 and IPv6?
The Internet Group Management Protocol (IGMP) is a protocol that allows several devices to share one IP address so they can all receive the same data. IGMP is a network layer protocol used to set up multicasting on networks that use the Internet Protocolversion 4 (IPv4). Specifically, IGMP allows devices to join a multicasting group.
Multicasting is when a group of devices all receive the same messages or packets. Multicasting works by sharing an IP address between multiple devices. Any network traffic directed at that IP addresswill reach all devices that share the IP address, instead of just one device. This is much like when a group of employees all receive company emails di...
Computers and other devices connected to a network use IGMP when they want to join a multicast group. A router that supports IGMP listens to IGMP transmissions from devices in order to figure out which devices belong to which multicast groups. IGMP uses IP addresses that are set aside for multicasting. Multicast IP addresses are in the range betwee...
The IGMP protocol allows for several kinds of IGMP messages: 1. Membership reports: Devices send these to a multicast router in order to become a member of a multicast group. 2. "Leave group" messages: These messages go from a device to a router and allow devices to leave a multicast group. 3. General membership queries: A multicast-capable router ...
IGMP is a network layer protocol, and only networking devices that are aware of the network layer can send and receive messages. A router operates at the network layer, while a network switchmay only be aware of layer 2, also known as the data link layer. As a result, a switch may be unaware of which network devices are part of multicast groups, an...
IPv4 and IPv6 are two different versions of the Internet Protocol (IP). IPv6 is more modern, but IPv4 is still in wide use. In IPv6, Multicast Listener Discovery (MLD) is the protocol for multicasting, not IGMP.
Aug 26, 2024 · IGMP works by enabling hosts to send messages to routers indicating their interest in joining or leaving specific multicast groups. Routers use this information to forward multicast traffic only to the hosts that have joined a particular group.
IGMP is an IPv4 network protocol that facilitates communication for multicasting. It enables hosts and routers to exchange messages to establish and manage memberships within groups. By ensuring that only interested hosts receive the data IGMP enhances efficiency and reliability in transmission.
Nov 22, 2020 · IGMP stands for Internet Group Management Protocol, is a TCP/IP network layer protocol used for informing routers of the availability of multicast groups on the network. How it works.
The Internet Group Management Protocol (IGMP) is the protocol used by hosts to notify the local multicast router on the segment that they want to start receiving or stop receiving multicast traffic for a given multicast IPv4 group address.
