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black hole
Last modified: Tuesday, August 01, 2006 

Slang term for a router that goes down (offline) and whose absence goes undetected by other routers on the network. Packets that are forwarded to that router simply get dropped and never arrive at their destination. Black holes are unable to generate destination unreachable messages, so users are left unaware that data is being lost.
  Related Links

EnterpriseNetworkingPlanet
EnterpriseNetworkingPlanet provides practical advice and news for running and managing an enterprise network. In-depth articles and news cover topics such as network management, network monitoring, servers, communications, Internet telephony, operating systems, and much more.

PracticallyNetworked.com
PracticallyNetworked.com provides easy-to-understand help for small-network builders. The site contains how-to information for setting up and debugging home-office and small-business networks. Users can also find extensive troubleshooting information, tips on getting applications to work through firewalls, product reviews on network hardware and software, and more.

PracticallyNetworked.com Discussion Forums
If network connections, sharing computers, router problems or other networking issues are bogging you down, then the PracticallyNetworked.com discussion forum is the place to be. Here you'll find help and support for all your network-related problems.

What's the Difference Between Routers, Switches and Hubs?
Many people use the terms routers, switches and hubs interchangeably. However, the functions of the three devices are all quite different from one another, even if at times they are all integrated into a single device.

Related Categories

Networking Hardware

Networks

Routing

Related Terms

BGP

choke packet

data

Enhanced Interior Gateway Routing Protocol

HSRP

IP address

IP switching

network

offline

packet

packet buffer

packet filtering

router

routing

Routing Information Protocol

routing switch

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