Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CCNP-ENCOR > IP routing essentials > Flashcards

IP routing essentials Flashcards

1
Q

What is the purpose of a router

A

To forward traffic between different network segments.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How does a router learn about route paths

A

from static and dynamic routing protocols

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a dynamic routing protocol

A

A protocol that distributes network topology information between routers and provide ongoing updates to the topology without physical intervention. A dynamic routing protocol will attempt to select the best loop free path to the destination in the current network.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is an Autonomous System (AS)

A

Is a network of systems running the same dynamic routing protocol and managed under the same network administration.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is an Interior gateway protocol

A

a routing protocol optimised for routing within an AS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is an exterior gateway protocol

A

a routing protocol optimised for routing between AS’s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the different types of dynamic routing algorithms

A

Distance Vector
Enhanced Distance Vector
Link State
Path Vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a distance vector algorithm

A

determines the best route for data packets based on distance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What routing protocol uses a distance vector algorithm

A

RIPv2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the metric used in RIP

A

Hops to destination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Does RIP have a complete map of the network topology

A

NO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the advantage of RIP

A

very low CPU resource consumed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the main disadvantage of RIP

A

It relies purely on hop count, no consideration is taken into the bandwidth of the link.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is an enhanced distance vector algorithm

A

It is an enhanced version of distance vector that relies on more than just distance(hops) to calculate the metric.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What routing protocol uses an enhanced distance vector algorithm

A

EIGRP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the metric used in EIGRP

A

by default (total path delay + minimum bandwidth)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Does EIGRP have a complete map of the network topology

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the advantage of EIGRP

A

Rapid convergence time
updates are only sent when there is an update.
Uses multiple attributes to calculate metric not just hop count.
Supports un-equal cost multi pathing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a link state algorithm, and how does it identify the best path

A

Each router advertises every connect & directly connected routes and the state of that link to each other router. When the entire topology is learnt. Then Dijkstra’s algorithm is ran to identify the shortest path

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are the advertisement packets called in:

OSPF
IS-IS

A

OSPF: LSA
IS-IS: LSP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the advantages to link state routing protocols

A

due to running the Dijkstra algorithm less chance of routing loops

Better path decisions

OSPF and IS-IS have features that allow them to support technology such as MPLS traffic engineering.

22
Q

What is the main disadvantage of link state routing protocols

A

Due to all routers having to have an identical map of the network to perform the algorithm a high amount of CPU usage is required.

23
Q

What is a path vector algorithm

A

It uses multiple attributes to calculate metric.

24
Q

What routing protocol uses path vector algorithm

25
Q

How does BGP prevent routing loops

A

By recording the AS number of every AS the packets pass through and will automatically drop the packet if it matches

26
Q

When multiple paths have the same destination network address what is the process for selecting the route to be installed into the RIB

A
  1. Longest prefix length /26>/23
  2. AD of routing protocol
  3. Metric
27
Q

What is the default administrative distance of a connected route

28
Q

What is the default administrative distance of a directly connected route

29
Q

What is the default administrative distance of EIGRP (Summary route)

30
Q

What is the default administrative distance of eBGP

31
Q

What is the default administrative distance of EIGRP (internal)

32
Q

What is the default administrative distance of OSPF

33
Q

What is the default administrative distance of IS-IS

34
Q

What is the default administrative distance of RIP

35
Q

What is the default administrative distance of EIGRP (external)

36
Q

What is the default administrative distance of iBGP

37
Q

What is equal cost multi pathing

A

When 2 routes from the same protocol are presented that have the same metric. Both routes will be entered into the RIB and the traffic will be load balanced across the 2 paths.

38
Q

What dynamic routing protocols support equal cost multi pathing

A

RIP
EIGRP
OSPF
IS-IS

39
Q

What is un-equal cost multi pathing

A

When 2 routes from the same protocol are presented that have the different metrics. Both routes can be entered into the RIB and the traffic will be load balanced across the 2 paths. This is not enabled by default.

40
Q

What dynamic routing protocols support equal cost multi pathing

41
Q

What is a directly attached static route

A

A static route where the next hop is defined as the outgoing interface.

42
Q

What is a recursive static route

A

A static route where the next hop is defined as the remote link IP address.

43
Q

What is a fully specified static route

A

a static route where both the outgoing interface and the remote IP are defined.

44
Q

IPv6 uses the same principles for routing as IPv4

True or False

44
Q

What is a static null interface

A

A logical interface that drops all traffic destined for it.

45
Q

What command is needed to enable IPv6 routing

A

IPv6 unicast routing

46
Q

What is a VRF

A

A technology that creates multiple virtual routers on 1 physical router.

47
Q

What parameters are separated between VRF instances

A

Routing tables
Router interfaces
Forwarding tables

48
Q

What is the default VRF called

49
Q

What is the main advantage of VRFs

A

Increased network security by separation

CCNP-ENCOR (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions