Practice BGP and routing vocabulary: Border Gateway Protocol, Autonomous Systems, route advertisement, prefix hijacking, anycast DNS, and BGP convergence.
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What does BGP stand for?
BGP (Border Gateway Protocol) is the routing protocol that underpins the internet. It exchanges routing information between Autonomous Systems (ASes), determining how traffic flows between networks.
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What is an AS (Autonomous System) in BGP vocabulary?
An Autonomous System (AS) is a collection of IP networks and routers under a single organization's control that presents a unified routing policy to the internet. Each AS has an ASN (Autonomous System Number).
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'The route is ___ via BGP.' Which verb is standard for publishing routes?
Routes are 'advertised' via BGP. BGP 'route advertisement' is how ASes inform neighboring ASes about which IP prefixes they can reach.
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What is 'prefix hijacking' in BGP?
BGP prefix hijacking (or route hijacking) occurs when an AS incorrectly advertises ownership of IP prefixes it doesn't control, causing internet traffic to be misdirected — sometimes maliciously.
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'BGP ___ describes how quickly routing tables stabilize after a change.' Which noun fits?
'BGP convergence' is the time it takes for all routers in the network to agree on consistent routing tables after a topology change. Slow convergence causes brief outages or misrouting.