Cisco Ii Chap7

Front 1

The purpose of dynamic routing protocols includes:

Back 1

Discovery of remote networks
Maintaining up to date routing info
Choosing the best path to networks
Ability to find alternate best path if one goes down

Front 2

The main components of dynamic routing protocols include:

Back 2

Data Structures
Routing protocol messages
Algorithm

Front 3

Routing protocols typically use tables or databases for its operation which is kept in __________

Back 3

RAM

Front 4

Routing protocols use ____________ for facilitating routing information and best path determination

Back 4

algorithm

Front 5

EIGRP creates and maintains the _____________, ____________, and _____________

Back 5

Neighbor table
Topology table
Best path in the routing table

Front 6

In the area of routing protocol messages, EIGRP uses what types of messages?

Back 6

Acknowledgments
Queries
Updates
Replies
Hellos

Front 7

To identify the best route to a network, EIGRP uses the ___________ algorithm

Back 7

DUAL

Front 8

Static routing has several primary uses including

Back 8

Ease of table maintenance in small networks
Routing to and from stub networks
Accessing a single default route

Front 9

Disadvantages of static routing includes

Back 9

Not easy to implement in large networks
Managing configurations can be time consuming
If a link fails, a static route cannot reroute traffic

Front 10

_______________ time, is the time it takes routers to share information, calculate best paths, and update their routing tables.

Back 10

Convergence

Front 11

Convergence properties include the speed of propagation of routing information and the calculation of optimal paths.

Back 11

T

Front 12

The _________ of propagation refers to the amount of time it takes for routers within the network to forward routing information

Back 12

speed

Front 13

An ______________ system, is a collection of routers under a common administration such as a company or an organization. It is also known as a routing domain

Back 13

autonomous

Front 14

The ___________, is based on the autonomous system concept

Back 14

internet

Front 15

Interior gateway protocols (IGP) are used for routing __________ an autonomous system

Back 15

within

Front 16

Exterior gateway protocols are used for routing __________ autonomous systems

Back 16

between

Front 17

The only exterior gateway protocol is ___________

Back 17

BGP

Front 18

_____________ vector means that routes are advertised by providing two characteristics; distance and vector

Back 18

Distance

Front 19

_____________ identifies how far it is to the destination network and is based on a metric such as hop count, cost, bandwidth, delay ect.

Back 19

Distance

Front 20

______________ specifies the direction of the next hop router or exit interface to reach the destination

Back 20

vector

Front 21

Do distance vector routing protocols have an actual map of the network topology?

Back 21

No

Front 22

Distance vector protocols use routers as __________ posts along the path to the final destination

Back 22

sign

Front 23

What are the four distance vector protocols for IPv4?

Back 23

RIPv1
RIPv2
IGRP
EIGRP

Front 24

In contrast to distance vector routing protocol operation, a router configured with a ___________ routing protocol can create a complete view of the topology of the network.

Back 24

link-state

Front 25

Unlike distance vector routing protocols, link state protocols do not use periodic updates. Instead an update is only sent when there is a ___________ in the network topology.

Back 25

change

Front 26

Link-state protocols work best in situations where :

Back 26

Large hierarchical networks
Need for fast convergence
Admins have good knowledge of the routing protocol

Front 27

What are the 2 link-state protocols for IPv4?

Back 27

OSPF
IS-IS

Front 28

The biggest distinction between classful and classless routing protocols is that classful routing protocols do not send _____________ information

Back 28

subnet mask

Front 29

What are 2 classful routing protocols?

Back 29

RIPv1
IGRIP

Front 30

Is classful routing protocols used in IPv6 addressing?

Back 30

No

Front 31

Classful routing protocols can not provide _____________ or _____________

Back 31

VLSM
CIDR

Front 32

A discontiguous network is when subnets from the same classful major network are separated by a different classful network

Back 32

T

Front 33

What are the classless IPv4 routing protocols?

Back 33

RIPv2
EIGRP
OSPF
IS-IS

Front 34

All IPv6 routing protocols are ______________-

Back 34

classless

Front 35

In a situation where there are multiple paths to the same remote network, a routing ____________ is used to determine the cost of a path from source to destination

Back 35

metric

Front 36

RIP chooses the best path based on ___________

Back 36

hop count

Front 37

OSPF chooses the best path based on _____________

Back 37

bandwidth

Front 38

RIP sends updates to its neighbors every ______ seconds

Back 38

30

Front 39

RIPv1 reaches all of its neighbors by sending updates to all hosts with the address of

Back 39

255.255.255.255 broadcast

Front 40

RIPv2 and EIGRP use ___________ addresses so that only neighbors that need to updates will receive them

Back 40

multi-cast

Front 41

EIGRP can also send a _________ message to only the affected neighbor

Back 41

unicast

Front 42

The ________ is the mechanism responsible for:
*Sending and receiving routing info
*Calculating the best path
*Installing routes in the routing table
*detecting and reacting to topology changes

Back 42

algorithm

Front 43

What algorithm is used by RIP?

Back 43

Bellman-Ford

Front 44

What algorithm is used by IGRP and EIGRP?

Back 44

DUAL

Front 45

In RIP, the _________ count is used as the metric for path selection

Back 45

hop

Front 46

With the ______ protocol, a hop count greater than 15 is deemed to far and would not propagate the update past the 15th router

Back 46

RIP

Front 47

To gain access to the router configuration mode where the RIP routing settings are configured you would enter the _____________ command

Back 47

router rip

Front 48

To disable and eliminate RIP, use the _______________ command

Back 48

no router rip

Front 49

To enable RIP routing on an interface that belongs to a specific network and advertise the network through routing updates you would use the ____________ command

Back 49

network {network address here}

Front 50

If a subnet address is entered in the network {address} command, the IOS automatically converts it to a _____________ network address

Back 50

classful

Front 51

The ______________ command would be entered in router configuration mode to update RIPv1 but listen for RIPv2

Back 51

no version

Front 52

By default, RIP updates are forwarded out ______ RIP enabled interfaces.

Back 52

all

Front 53

To prevent the transmission of routing updates through a router interface, but still allow that network to be advertised to other routers use the _____________ command

Back 53

passive-interface

Front 54

To make all interfaces passive, use the ______________ command

Back 54

passive-interface default

Front 55

To re-enable an interface that should not be passive use the _______________ command

Back 55

no passive-interface

Front 56

To propagate a default route, the edge router must be configured with a __________________

Back 56

default static route

Front 57

The command to propagate the default static route is ________________ in the router configuration mode

Back 57

default-information originate

Front 58

To enable RIPng routing on an IPv6 router use the _______________ command on the interface

Back 58

ipv6 rip {domain name} enable

Front 59

For ipv6 routing on a serial interface the _____________ command must be used to enable the interace

Back 59

no shutdown

Front 60

OSPF and IS-IS uses the __________ algorithm

Back 60

Dijkstra

Front 61

The Dijkstra algorithm ueses accumulated costs along each path, from source to destination to determine the total cost of a route

Back 61

T

Front 62

Link-state routing protocols are also know as _________________, and are built around Dijkstra's _______________ algorithm

Back 62

shortest path first
SPF

Front 63

In _____________ routing, each router
*Learns about each of its own directly connected networks
*says hello to neighboring directly connected networks
*Builds a link-state packet (LSP)with each directly connected link
*Floods the LSP to all neighbors which are stored in a database
*uses the database to construct a complete map of the topology and computes the best path

Back 63

link-state

Front 64

Cisco's implementation of OSPF specifies the OSPF routing metric as the cost of the link based on the ______________ of the outgoing interface

Back 64

bandwidth

Front 65

When two link-state routers learn that they are neighbors, the form an __________

Back 65

adjacency

Front 66

If a router stops receiving hello packets from a neighbor, that neighbor is considered unreachable and adjacency is ____________-

Back 66

broken

Front 67

Link-state packets only need to be sent when?

Back 67

*At initial startup
*When there is a change in the topology

Front 68

Information in the LSP such as ___________ and __________ ensures that the router only adds the most recent updates to its routing table

Back 68

sequence number
aging information