Day 24 | Dynamic Routing

A route to a /32 destination is known as a […] route.

host

A route to a network/subnet is known as a […] route.

network

Routers can use […] to advertise information about the routes they know to other routers.

dynamic routing protocols

If R1 learns multiple routes to the same destination from two different routing protocols, what is used to determine which route will be added to R1's routing table?

AD (Administrative Distance)

If R1 learns multiple routes to the same destination from the same routing protocol, what is used to determine which route will be added to R1's routing table?

Metric

Does a router prefer a lower or higher AD when selecting routes?

lower

Does a router prefer a lower or higher metric when selecting routes?

lower

Dynamic routing: What does IGP stand for?

Interior Gateway Protocol

Dynamic routing: What does EGP stand for?

Exterior Gateway Protocol

IGPs are used to share routes within a single […]

autonomous system (AS)

[…] are used to share routes within a single autonomous system (AS).

IGPs

EGPs are used to share routes between different […]

autonomous systems (AS)

[…] are used to share routes between different autonomous systems (AS).

EGPs

What are the two types of IGP?

Distance Vector Link State

What is the single type of EGP?

Path Vector

What are the two Distance Vector routing protocols?

RIP EIGRP

What are the two Link State routing protocols?

OSPF IS-IS

What is the single Path Vector routing protocol?

BGP

What does RIP stand for?

Routing Information Protocol

What does EIGRP stand for?

Enhanced Interior Gateway Routing Protocol

What does OSPF stand for?

Open Shortest Path First

What does IS-IS stand for?

Intermediate System to Intermediate System

What does BGP stand for?

Border Gateway Protocol

What kind of dynamic routing protocol operates using 'routing by rumor'?

Distance Vector

[…] routing protocols send the following information to their connected neighbors: -their known destination networks -their metric to reach their known destination networks

Distance Vector

When using a […] routing protocol, every router creates a 'connectivity map' of the network.

link state

Which kind of routing protocol uses more CPU resources on the router, distance vector or link state?

link state

Which kind of dynamic routing protocol tends to react faster to changes in the network, distance vector or link state?

link state

What is the metric value of this route? O 192.168.4.0/24 [110/3] via 10.0.12.2

3

What is the AD value of this route? O 192.168.4.0/24 [110/3] via 10.0.12.2

110

What does ECMP stand for?

Equal Cost Multi-Path (load-balancing)

R1 learns two routes to the same destination, via the same routing protocol, and both routes have the same metric. Which will be added to the routing table?

Both (traffic will be load-balanced)

What metric does RIP use?

hop count

What dynamic routing protocol calculates metric using bandwidth and delay (and others, if configured)?

EIGRP

Which dynamic routing protocol uses a cost calculated based on interface bandwidth as its metric?

OSPF

In which dynamic routing protocol do all links have a metric cost of 10 by default?

IS-IS

[…] is used to compare routes learned via the same routing protocol.

Metric

[…] is used to compare routes learned via different routing protocols.

AD (Administrative Distance)

Route protocol/type: Directly connected AD: […]

0

Route protocol/type: Static AD: […]

1

Route protocol/type: eBGP AD: […]

20

Route protocol/type: EIGRP AD: […]

90

Route protocol/type: IGRP AD: […]

100

Route protocol/type: OSPF AD: […]

110

Route protocol/type: IS-IS AD: […]

115

Route protocol/type: RIP AD: […]

120

Route protocol/type: EIGRP (external) AD: […]

170

Route protocol/type: iBGP AD: […]

200

Route protocol/type: Unusable route AD: […]

255

"Configure a static route, and specify the AD: R1(config)# […]"

ip route destination mask next-hop AD (ie. ip route 10.0.0.0 255.0.0.0 10.0.13.2 115)

What is the name for a static route which has a higher AD than a route learned via a dynamic routing protocol?

Floating static route