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31 Days to CCNA > Day 19 - Basic Routing Concepts > Flashcards

Day 19 - Basic Routing Concepts Flashcards

1
Q

The results in a routing table result in 3 types of path determination. What are they?

A

Directly connected network
Remote networks
No route determined

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2
Q

If a packet is being forwarded out a fastEthernet interface then the packet is encapsulated in what type of frame?

A

Ethernet frame

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3
Q

If the exit interface for a packet is a serial interface what type of frame is the IP packet encapsulated in?

A

PPP Frame

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4
Q

When a router is making a determination on where to send traffic in with a routing table, the preferred route is the route with the longest what?

A

Longest prefix match

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5
Q

Do serial interfaces use MAC addresses?

A

No

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6
Q

What data-link address do interfaces using High-Level Data Link Control (HDLC) use?

A

0x8F

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7
Q

When an Ethernet frame contains an IP packet in the data portion of the frame, which Ethertype field is used?

A

0x800

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8
Q

A router can learn routes from 3 sources. What are they?

A

Directly connected routes
Static routes
Dynamic routes

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9
Q

True or False:

Dynamic routing is more secure than static routing

A

False

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10
Q

Which type of routing (Dynamic or Static) uses more memory, CPU usage and link bandwidth?

A

Dynamic

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11
Q

Which type of routing (Dynamic or Static) always uses the same route to the desination?

A

Static

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12
Q

Which type of routing (Dynamic or Static) uses a route that depends on the current topology?

A

Dynamic

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13
Q

What are the 10 IGPs?

A

RIP
RIPv2
RIPng

IGRP
EIGRP
EIGRP for IPv6

OSPFv2
OSPFv3

IS-IS
IS-IS for IPv6

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14
Q

What are the 6 distance vector routing protocols?

A

RIP
RIPv2
RIPng

IGRP
EIGRP
EIGRP for IPv6

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15
Q

What are 4 link state routing protocols?

A

OSPFv2
OSPFv3
IS-IS
IS-IS for IPv6

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16
Q

What are the 3 EGPs?

A

EGP
BGPv4
MP BGP-4 (IPv6)

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17
Q

What type of gateway protocol are the EGPs?

A

Path vector

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18
Q

Routing protocols are classified into different groups according what characteristics?

A

IGP or EGP
Distance vector or link state
Classful or classless

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19
Q

This is a collection of routers under a common administration that presents a common, clearly defined routing policy to the Internet

A

Autonomous System (AS)

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20
Q

This group of routing protocols is used for intra-AS routing

A

IGPs

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21
Q

This group of routing protocols is used for inter-AS routing

A

EGPs

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22
Q

Distance vector protocols typically use what algorithm?

A

Bellman-Ford

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23
Q

Distance, in regards to distance vector protocols, is defined in terms of what?

A

Metric such as hop count
Direction, next hop router

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24
Q

In distance vector routing protocols, the router knows only the routing information received from its what?

A

Neighbors

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25
Q

True or False:

Distance vector protocols have a full map of the entire topology of the network

A

False

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26
Q

What type of overarching group of routing protocols works best for flat networks who don’t require hierarchical design, hub and spoke networks, and convergence times are a non-factor

A

Distance vector protocols

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27
Q

True or False:

A router configured with a link state routing protocol can create a complete view, or topology, of the network by gathering information from all of the other routers

A

True

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28
Q

A router configured with this type of routing protocol can create a complete view, or topology, of the network by gathering information from all of the other routers

A

Link state routing protocol

29
Q

__________ __________ __________ do not send subnet mask information in routing updates

A

Classful routing protocols

30
Q

What routing protocol is considered a classful routing protocol?

A

RIPv1 and IGRP

31
Q

__________ ___________ __________ include the subnet mask with the network address in routing updates

A

Classless routing protocols

32
Q

What routing protocols are considered classless routing protocols?

A

RIPv2
EIGRP
OSPF
IS-IS
BGP

33
Q

What routing protocol uses hop count as its metric?

A

RIP

34
Q

What routing protocol uses bandwidth, delay, reliability and load and its metric? By default only bandwidth and delay are used.

A

IGRP and EIGRP

35
Q

What routing protocol uses cost as its metric?

A

OSPF and IS-IS

36
Q

If you want to view the metric associated with a certain routing protocol what command can you use to view that?

A

show ip route

37
Q

All routing protocols are capable of automatically load balancing traffic for up to how many equal cost routes?

A

4

38
Q

The administrative distance value ranges from _____ to _____

A

0 - 255

39
Q

The __________ the AD value, the more preferred the route

A

Lower

40
Q

What is the most preferred AD?

A

0 for a connected route

41
Q

What does an AD of 255 mean?

A

Means the router will not believe the source of that route and it will not be installed in the routing table

42
Q

What command other than show ip route can give you information about the AD values?

A

show ip protocols

43
Q

What is the default AD of a connected route?

A

0

44
Q

What is the default AD of a static route?

A

1

45
Q

What is the default AD of an EIGRP summary route?

A

5

46
Q

What is the default AD of an external BGP route?

A

20

47
Q

What is the default AD of an internal EIGRP route?

A

90

48
Q

What is the default AD of an IGRP route?

A

100

49
Q

What is the default AD of an OSPF route?

A

110

50
Q

What is the default AD of an IS-IS route?

A

115

51
Q

What is the default AD of a RIP route?

A

120

52
Q

What is the default AD of an external EIGRP route?

A

170

53
Q

What is the default AD of an internal BGP route?

A

200

54
Q

What multicast address are RIP updates sent to?

A

224.0.0.9

55
Q

What multicast address are OSPF updates sent to?

A

224.0.0.5 and 224.0.0.6

56
Q

What multicast address are EIGRP updates sent to?

A

224.0.0.10

57
Q

After how many hops is a route considered unreachable via RIP

A

16

58
Q

When is a route considered unreachable via OSPF

A

Depends on the MaxAge of LSA which is never incremented past 3600 seconds

59
Q

Do OSPF and EIGRP send periodic updates?

A

No. RIP does that

60
Q

Name the metrics for RIP, EIGRP and OSPF

A

RIP - Hop Count
EIGRP - Bandwidth and Delay
OSPF - Bandwidth

61
Q

A _________ field avoids a situation in which an undeliverable packet circulates endlessly on the network

A

TTL

62
Q

Solve for definition:

A routing table is sent immediately in response to a routing change

A

Triggered updates

63
Q

OSPF Routers use what kind of database to calculate the current best routes to each subnet

A

LSDB

64
Q

Routing updates via OSPF are advertised as what type of messages?

A

Link state advertisements (LSAs)

65
Q

Link state protocols require periodic reflooding of the LSAs every __ __________ by default

A

30 minutes

66
Q

If a LSA changes, router does what?

A

Immediately floods the changed LSA

67
Q

What algorithm does OSPF use?

A

Dijsktra method

68
Q

When an LSA changes, link state protocols react swiftly, using the current best routes as quickly as possible. This is known as what?

A

Convergence

69
Q

What routing protocol has the lowest administrative distance?

IS-IS
OSPF
EIGRP
eBGP
RIP

A

eBGP (AD 20)

31 Days to CCNA (27 decks)

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