hello packet

hello packet

(networking, communications)
An OSPF packet sent periodically on each network interface, real or virtual, to discover and test connections to neighbours. Hello packets are multicast on physical networks capable of multicasting or broadcasting to enable dynamic router discovery. They include the parameters that routers connected to a common network must agree on.

Hello packets increase network resilience by, e.g., allowing a router to establish a secondary connection when a primary connection fails.
References in periodicals archive ?
Upon receiving a hello packet from a new neighbor, after a random delay, each node replies with its cluster key to the sender encrypted using their pair wise key which can be established by the existing method [23][24].
When a node is deployed, it notifies its neighbors through periodic hello packets.
Initially the nodes will transmit a hello packet to the base station.
The performance of neighbor knowledge method depends upon the exchange of hello packet.
Hello packet messages are received by its neighborhood node to check whether the sensor nodes are alive.
In addition, it helps keep performance high by supporting spoofing, IPX, RIP/SAP, and spanning tree hello packets, and by providing data compression.
In Hello Flood Attack, Attacker broadcast hello packets to the networks to add himself as the neighbor to the other nodes.