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34 Cards in this Set

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Link-state routing protocol uses which algorithm ?
Dijkstra's algorithm or
SPF algorithm
What are the main concerns related to link-state protocols ?
Processor overhead
Memory requirements
Bandwidth consumption
Examples of IP routing protocols ?
RIP - a distance vector interior routing protocol
IGRP - the Cisco distance vector interior routing protocol
OSPF - a link-state interior routing protocol
EIGRP - the advanced Cisco distance vector interior routing protocol
BGP - a distance vector exterior routing protocol
RIP key characteristics ?
It is a distance vector routing protocol.
Hop count is used as the metric for path selection.
If the hop count is greater than 15, the packet is discarded.
Routing updates are broadcast every 30 seconds, by default.
IGRP key characteristics ?
It is a distance vector routing protocol.
Bandwidth, load, delay and reliability are used to create a composite metric.
Routing updates are broadcast every 90 seconds, by default.
OSPF key charasteristics ?
It is a link-state routing protocol.
It is an open standard routing protocol described in RFC 2328.
The SPF algorithm is used to calculate the lowest cost to a destination.
Routing updates are flooded as topology changes occur.
Key characteristics of EIGRP ?
It is an enhanced distance vector routing protocol.
It uses unequal cost load balancing.
It uses a combination of distance vector and link-state features.
It uses Diffusing Update Algorithm (DUAL) to calculate the shortest path.
Routing updates are multicast using 224.0.0.10 triggered by topology changes.
Key characteristics of BGP ?
It is a distance vector exterior routing protocol.
It is used between ISPs or ISPs and clients.
It is used to route Internet traffic between autonomous systems.
Distance vector uses which algorithm ?
Bellman-Ford algorithm.
Link-state routing protocol uses which algorithm ?
Dijkstra's algorithm
What are the main concerns related to link-state protocols ?
Processor overhead
Memory requirements
Bandwidth consumption
Examples of IP routing protocols ?
RIP - a distance vector interior routing protocol
IGRP - the Cisco distance vector interior routing protocol
OSPF - a link-state interior routing protocol
EIGRP - the advanced Cisco distance vector interior routing protocol
BGP - a distance vector exterior routing protocol
RIP key characteristics ?
It is a distance vector routing protocol.
Hop count is used as the metric for path selection.
If the hop count is greater than 15, the packet is discarded.
Routing updates are broadcast every 30 seconds, by default.
IGRP key characteristics ?
It is a distance vector routing protocol.
Bandwidth, load, delay and reliability are used to create a composite metric.
Routing updates are broadcast every 90 seconds, by default.
How do Routing loops occur ?
Routing loops can occur when inconsistent routing tables are not updated due to slow convergence in a changing network
RIP updates how often ?
RIP updates occur every 30 seconds
RIP v2 enhancements include ?
Ability to carry additional packet routing information
Authentication mechanism to secure table updates
Support for variable-length subnet mask (VLSM)
RIP optional tasks include the following ?
Apply offsets to routing metrics
Adjust timers
Specify a RIP version
Enable RIP authentication
Configure route summarization on an interface
Verify IP route summarization
Disable automatic route summarization
Run IGRP and RIP concurrently
Disable the validation of source IP addresses
Enable or disable split horizon
Connect RIP to a WAN
To reduce routing loops and counting to infinity, RIP uses the following techniques ?
Split horizon
Poison reverse
Holddown counters
Triggered updates
The default holddown for RIP is ?
180 seconds
Defult Administrative Distance - Static route
1
Defult Administrative Distance - EIGRP Summary route
5
Defult Administrative Distance - External BGP
20
Defult Administrative Distance - EIGRP internal route
90
Defult Administrative Distance - IGRP
100
Defult Administrative Distance - OSPF
110
Defult Administrative Distance - IS-IS
115
Defult Administrative Distance - RIP
120
Defult Administrative Distance - EIGRP external route
170
Defult Administrative Distance - Internal BGP
200
Defult Administrative Distance - Unknown
255
Defult Administrative Distance - Connected Interface
0
IGRP sends routing updates ?
90 second intervals
IGRP routing protocol uses which metrics ?
bandwidth and delay