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Details

CCNA 640-802 Ch.6
IP Routing
21
Computer Networking
Professional
12/12/2012

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Cards

Term
What is the administrative distance for EIGRP?
Definition
90
Term
What is the administrative distance for OSPF?
Definition
110
Term
What is the administrative distance for External EIGRP
Definition
170
Term
What are Distance Vector Protocols
Definition
Rip and IGRP
Term
What do distance vector protocols send to directly connected neighbors?
Definition
Their entire routing table.
Term
What does RIP use to determine the best path to a network
Definition
Hop Count
Term
What does RIP do if two paths to the same network have the same hop count?
Definition
It performs Round Robin and load balances across both paths.
Term
How many links does RIP load balance across by default?
Definition
4. It can do it across 6 total.
Term
What is the maximum hop count for RIP?
Definition
15
Term
What is split horizon?
Definition
Prevents routing loops by preventing routing updates to be broadcasted out the same interface it was received.
Term
What is route poisoning?
Definition
A neighbor router will advertise a network as a hop of 16 meaning unreachable.
Term
What do holddown timers do?
Definition
Prevents regular updates being sent out on a flapping route. A message sent out everytime could congest the network and bring the whole network down.
Term
How often does RIP send updates?
Definition
30 seconds
Term
How long of time must pass before a route is determined as down in RIP
Definition
180 seconds. It must receive an update before this time.
Term
What is the dfault holddown timer for RIP?
Definition
180 secs.
Term
What does the passive interface command do?
Definition
Prevents route updates being broadcasted out the specified interface
Term
What is the passive interface command?
Definition
router#config t
router(config)#router rip
router(config-router)#passive-interface s0/0
Term
What are the major differences with RIPv2 as compared to RIPv1
Definition
RIPv2 is classless
RIPv2 supports VLSM
RIPv2 supports MD5 authentication
RIPv2 supports discontigious networks
RIPv2 uses multicast address of 224.0.0.9
Term
What is the hop count of IGRP
Definition
Max of 255. 100 by default
Term
What metric does IGRP use?
Definition
Bandwidth and delay
Term
IGRP IS NO LONGER SUPPORTED!
Definition
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