shell jacket

n : waist-length jacket tapering to a point at the back; worn by

officers in the mess for formal dinners [syn: {mess

jacket}, {monkey jacket}]

hello packet

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.

(1999-11-02)