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58 Cards in this Set
- Front
- Back
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What is the default Administrative Distance for a connected segment? |
0 |
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What does a default Administrative Distance of 0 indicate? |
A locally-connected segment |
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What is the default Administrative Distance for a static route? |
1 |
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What does a default Administrative Distance of 1 indicate? |
A static route |
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What is the default Administrative Distance for eBGP? |
20 |
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What does a default Administrative Distance of 20 indicate? |
An eBGP route |
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What is the default Administrative Distance for internal EIGRP? |
90 |
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What does a default Administrative Distance of 90 indicate? |
An internal EIGRP route |
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What is the default Administrative Distance for IGRP? |
100 |
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What does a default Administrative Distance of 100 indicate? |
An IGRP route |
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What is the default Administrative Distance for OSPF? |
110 |
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What does a default Administrative Distance of 110 indicate? |
An OSPF route |
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What is the default Administrative Distance for IS-IS? |
115 |
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What does a default Administrative Distance of 115 indicate? |
An IS-IS route |
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What is the default Administrative Distance for RIP? |
120 |
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What does a default Administrative Distance of 120 indicate? |
A RIP route |
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What is the default Administrative Distance for an external EIGRP route? |
170 |
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What does a default Administrative Distance of 170 indicate? |
An external EIGRP route |
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What is the default Administrative Distance for iBGP? |
200 |
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What does a default Administrative Distance of 200 indicate? |
An iBGP route |
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What is the default Administrative Distance for Default DHCP? |
254 |
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What does a default Administrative Distance of 254 indicate? |
A DHCP Default route |
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What is an OSPF Link State Database? |
A list of all LSAs known to a router |
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What command will show the OSPF Link State Database? |
Show ip ospf database |
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How does OSPF calculate routes? |
Each router calculates its own routes based on their copy of the LSDB |
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What command will display an OSPF router's neighbors? |
Show ip ospf neighbors |
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What is the default OSPF router ID? |
The interface's IP address |
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What port does OSPF use? |
89 |
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What address does OSPF use for LSAs? |
224.0.0.5 |
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What state does OSPF enter when it receives a Hello packet from an unknown router? |
Init mode |
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When does an OSPF router enter 2-way mode? |
When it receives a reply to one of its Hello packets |
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What state does an OSPF router go into when it receives a Reply to one of its Hello packets? |
2-way |
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What do OSPF neighbors exchange to make sure they have the same information? |
Link State Update (LSU) packets |
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What is a Link State Update? |
A list of all the LSAs a router has |
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What state is are OSPF routers in when they both have the same LSAs? |
Full |
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What 2 intervals does OSPF use to maintain neighbor relationships? |
Hello and Dead intervals |
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How long is the Dead interval by default? |
4x the Hello interval |
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How often is an LSA flooded, and by whom? |
The router creating an LSA will flood it every 30 minutes |
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In an ethernet network with a Designated Router, which routers will go to Full state? |
Each router will get to Full with the DR only |
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What routers are considered adjacent in OSPF? |
All neighbors |
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In OSPF, what routers are considered fully adjacent? |
Neighbors with which they will exchange LSAs and go to Full state |
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What command will define an OSPF's router ID? |
Router-id |
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What does an OSPF router choose as its router ID if one is not explicitly set? |
Its highest loopback address if present; otherwise, its highest IP address (in Up status) |
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When is router ID chosen? |
Only when OSPF starts |
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What command will restart OSPF without restarting router? |
Clear ip ospf process |
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What command will turn off Hello messages on an interface? |
Passive-interface |
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What command will set all interfaces to passive? |
Passive-interface default |
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What command will tell a specific interface NOT to be passive? |
No passive-interface <int> |
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What command will tell an OSPF router to advertise its default route? |
Default-information originate |
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What command will change the cost of an interface for OSPF? |
Ip ospf cost <cost> |
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How is the default OSPF interface cost calculated? |
Reference_bandwidth ÷ interface_bandwidth |
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What is the default reference bandwidth for calculating an interface's cost? |
100Mbps |
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What command will change the interface bandwidth used for calculating an interface's cost? |
Bandwidth <speed> |
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What command will change the reference speed used for calculating an interface's cost? |
Auto-cost reference_bandwidth <speed> |
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What interface command will set that interface into a particular area? |
Ip ospf <process> area <area> |
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What command will log messages for OSPF routers becoming neighbors? |
Debug ip ospf adj |
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What command will log all OSPF events? |
Debug ip ospf events |
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What command will log all messages for OSPF packet flow? |
Debug ip ospf packets |
