Cisco 3 - Chapter 5

False Link-state is classless by nature

True or False Vector routing protocols are classless by nature.

When compared with distance vector routing protocols, OSPF utilizes less memory and less CPU processing power.

Which statement is an incorrect description of the OSPF protocol? Multiarea OSPF helps reduce the size of the link-state database. OSPF builds a topological map of the network. OSPF has fast convergence. When compared with distance vector routing protocols, OSPF utilizes less memory and less CPU processing power.

B) OSPF C) IS-IS

Which two routing protocols are classified as link-state protocols? (Choose two.) A) EIGRP B) OSPF C) IS-IS D) RIP E) BGP

EIGRP

A network administrator is researching routing protocols for implementation in a critical network infrastructure. Which protocol uses the DUAL algorithm to provide almost instantaneous convergence during a route failover? BGP RIP EIGRP OSPF

Autonomous System (AS)

A(n) ____ ____ is a collection of routers under a common administration such as a company or an organization.

routing protocol

A(n) ____ ____ is a set of processes, messages, and algorithms that are used to trade routing information and populate the route routing table with it's choice of best paths.

link-state link-state information

A(n) ____-____ router uses the ____-____ ____ to create a topology map and to select the best path to all destination networks in the topology.

EIGRP

After a network topology change occurs, which distance vector routing protocol can send an update message directly to a single neighboring router without unnecessarily notifying other routers? RIPv1 OSPF IS-IS RIPv2 EIGRP

D) Every 30 seconds

How often does RIP send periodic updates to all of its neighbors? Choose the best answer. A) Every 3 seconds B) Every 5 seconds C) Every 60 seconds D) Every 30 seconds

Advantages: event-driven updates building a topological map fast convergence Disadvantages: bandwidth consumption memory usage CPU processing time

Match the features of link-state routing protocols to their advantages and disadvantages. Three of the listed statements are advantages, three are disadvantages. Not all options are used. bandwidth consumption event-driven updates using hop count as metric building a topological map memory usage fast convergence sending updates with broadcast CPU processing time

A) EIGRP

Match the metric to the protocol: Metric based on delay and bandwidth. A) EIGRP B) OSPF C) RIP

C) RIP

Match the metric to the protocol: Metric based on hop counts. A) EIGRP B) OSPF C) RIP

A) EIGRP

Match the metric to the protocol: Metric can be based additionally on load and reliability. A) EIGRP B) OSPF C) RIP

B) OSPF

Match the metric to the protocol: Uses cost (cumulative link bandwidths) as its metric. A) EIGRP B) OSPF C) RIP

Exterior Gateway Protocol (EGP)

This autonomous system concept is used between ASes.

Interior Gateway Protocol (IGP)

This autonomous system concept is used within an AS.

OSPF

This type of IPv4 IGP is referred to as a popular standards-based protocol.

True

True or False A router using a distance vector routing protocol does not have the knowledge of the entire path to a destination network.

True

True or False Classful addressing has never been a part of IPv6.

False RIP sends periodic updates

True or False OSPF sends periodic updates to it's neighbors to learn their routing information.

EIGRP

Updates are forwarded to 224.0.0.10

RIPv2

Updates are forwarded to 224.0.0.9

OSPF

Which routing protocol is designed to use areas to scale large hierarchical networks? OSPF EIGRP RIP BGP

RIP

Which routing protocol sends a routing update to neighboring routers every 30 seconds? BGP EIGRP OSPF RIP

B) EIGRP

Which routing protocol uses both bandwidth and delay to determine the best pathway to reach a remote network? A) OSPF B) EIGRP C) RIP D) IS-IS

OSPF

Which routing protocol uses link-state information to build a map of the topology for computing the best path to each destination network? OSPF RIP EIGRP RIPng

D) EIGRP

Which routing protocol uses the DUAL algorithm and sends multicast messages to propagate routing updates? A) RIPv1 B) RIPv2 C) OSPF D) EIGRP

C) EIGRP

Which routing protocol uses the Diffusing Update Algorithm to install routes into the routing table? A) RIP B) OSPF C) EIGRP D) BGP

A) IS-IS

Which routing protocol was designed by the International Organization for Standardization (ISO)? A) IS-IS B) EIGRP C) OSPF D) RIP

RIPv1 IGRP

Which routing protocols are considered classful?

RIPv2 EIGRP OSPF IS-IS BGP

Which routing protocols are considered classless?

sequence numbers aging information

Which two components of an LSP enable an OSPF router to determine if the LSP that is received contains newer information than what is in the current OSPF router link-state database? (Choose two.) sequence numbers hellos aging information query acknowledgements

a change in the topology the initial startup of the routing protocol process

Which two events will trigger the sending of a link-state packet by a link-state routing protocol? (Choose two.) the router update timer expiring a change in the topology the initial startup of the routing protocol process the requirement to periodically flood link-state packets to all neighbors a link to a neighbor router has become congested

The router has established its adjacencies. The router has determined the costs associated with its active links.

Which two requirements are necessary before a router configured with a link-state routing protocol can build and send its link-state packets? (Choose two.) The router has constructed an SPF tree. The router has established its adjacencies. The router has determined the costs associated with its active links. The routing table has been refreshed. The router has built its link-state database.

B) They are used to maintain neighbor relationships. D) They are used for dynamic neighbor discovery.

Which two statements are true for OSPF Hello packets? (Choose two.) A) They are used to negotiate correct parameters among neighboring interfaces. B) They are used to maintain neighbor relationships. C) They are used to determine the complete network topology. D) They are used for dynamic neighbor discovery. E) They are used to flood link-state information to all neighbors.

classless

Which type of routing protocols include in the subnet mask information in routing updates?

provider networks

Which type of the network does the chapter say IS-IS is popular in?

The cumulative bandwidth that is used along the routing path.

An OSPF enabled router is processing learned routes to select best paths to reach a destination network. What is the OSPF algorithm evaluating as the metric? The amount of packet delivery time and slowest bandwidth. The number of hops along the routing path. The amount of traffic and probability of failure of links. The cumulative bandwidth that is used along the routing path.

No

Do link-state routers use periodic updates?

A) Implement multiple areas of OSPF.

How can a network administrator reduce SPF overhead on OSPF routers? A) Implement multiple areas of OSPF. B) Increase the number of neighbor adjacencies. C) Decrease the hello timer intervals. D) Reduce the interface delay values.

A) RIPv2 D) EIGRP

Identify the distance vector routing protocol(s). Choose all that apply. A) RIPv2 B) BGP C) IS-IS D) EIGRP E) OSPF

D) OSPF E) IS-IS

Identify the link-state routing protocol(s). Choose all that apply. A) EIGRP B) RIPv2 C) BGP D) OSPF E) IS-IS

D) BGP

Identify the path-vector routing protocol(s). Choose all that apply. A) OSPF B) IS-IS C) EIGRP D) BDP E) RIPv2

split horizon

In distance vector routing, ____ ____ prevents information from being sent out the same interface from which it was received.

the amount of time for the routing tables to achieve a consistent state after a topology change

In the context of routing protocols, what is a definition for time to convergence? a measure of protocol configuration complexity the capability to transport data, video, and voice over the same media the amount of time for the routing tables to achieve a consistent state after a topology change the amount of time a network administrator needs to configure a routing protocol in a small- to medium-sized network

routing domain

The chapter also refers to an autonomous system as a(n) ____ ____.

A) They require a lot of hardware resources. C) They compute their own knowledge of the network topology.

What are two characteristics of link-state protocols compared to distance vector protocols? (Choose two.) A) They require a lot of hardware resources. B) They know of the network topology from the perspective of their neighbors. C) They compute their own knowledge of the network topology. D) They use hop counts to compute the network topology. E) They flood the routing table to all hosts periodically.

uses Dijkstra's algorithm to build the SPF tree calculates its metric using bandwidth

What are two features of the OSPF routing protocol? (Choose two.) has an administrative distance of 100 uses Dijkstra's algorithm to build the SPF tree automatically summarizes networks at the classful boundaries calculates its metric using bandwidth used primarily as an EGP

select best path to destination networks discover remote networks

What are two purposes of dynamic routing protocols? (Choose two.) select best path to destination networks discover remote networks provide network security reduce network traffic provide a default route to network hosts

A) during the initial startup of the routing protocol process D) when a neighbor adjacency changes

What are two situations where an OSPF router would send out a link-state packet (LSP)? (Choose two.) A) during the initial startup of the routing protocol process B) when a router hostname is changed C) when a periodic timer expires D) when a neighbor adjacency changes E) when a new end device is added to a current network

They consider the neighbor to be unreachable and the adjacency is broken.

What happens when two link-state routers stop receiving hello packets from neighbors? They continue to operate as normal and are able to exchange packets. They will flood their database tables to each other. They consider the neighbor to be unreachable and the adjacency is broken. They create a default route to the adjacent router.

OSPF uses excessive LSP flooding.

What is a disadvantage of deploying OSPF in a large single area routing environment? OSPF uses a topology database of alternate routes. OSPF uses a metric of bandwidth and delay. OSPF uses excessive LSP flooding. OSPF uses multicast updates.

A) fast convergence

What is an advantage of OSPF compared to RIP? A) fast convergence B) less complexity C) less CPU processing D) low memory requirements

all routes received from neighbors

What is maintained within an EIGRP topology table? the hop count to all networks all routes received from neighbors the area ID of all neighbors the state of all links on the network

A weird word that the chapter defines as something that connects to two different service providers

What is multihomed?

C) Interior routing protocols are used to communicate within a single autonomous system. Exterior routing protocols are used to communicate between multiple autonomous systems.

What is the difference between interior and exterior routing protocols? A) Exterior routing protocols are used only by large ISPs. Interior routing protocols are used by small ISPs. B) Exterior routing protocols are used to administer a single autonomous system. Interior routing protocols are used to administer several domains. C) Interior routing protocols are used to communicate within a single autonomous system. Exterior routing protocols are used to communicate between multiple autonomous systems. D) Interior routing protocols are used to route on the Internet. Exterior routing protocols are used inside organizations.

It learns about directly connected links in an active state.

What is the first step taken by a newly configured OSPF router in the process of reaching a state of convergence? It learns about directly connected links in an active state. It builds the topological database. It floods LSP packets to neighboring routers. It exchanges hello messages with a neighboring router.

NVRAM

What is the location of the configuration file that stores all the information a router has about network topology at startup?

C) split horizon

What loop prevention technique is implemented by distance vector routing protocols? A) gateway of last resort B) loop guard C) split horizon D) poison reverse

Link-state updates are sent when there is a change in the topology.

When are link-state updates sent?

Bellman-Ford

Which algorithm does RIP use for routing?

C) Dijkstra's algorithm

Which algorithm is used by the OSPF routing process to construct the SPF tree on a router? A) DUAL algorithm B) Bellman-Ford algorithm C) Dijkstra's algorithm D) path vector protocol

B) RIPv2

Which classless routing protocol supports VLSM and CIDR, supports manual route summarization, and uses the multicast address 224.0.0.9? A) RIPv1 B) RIPv2 C) OSPF D) EIGRP

BGP

Which dynamic routing protocol was developed as an exterior gateway protocol to interconnect different Internet providers? EIGRP BGP OSPF RIP

routing protocol authentication

Which feature provides secure routing updates between RIPv2 neighbors? keepalive messages unicast updates adjacency table routing protocol authentication

D) EIGRP

Which interior routing protocol uses protocol-dependent modules (PDMs)? A) RIP B) OSPF C) IS-IS D) EIGRP

D) EIGRP stores all routes learned from neighbors in a topology table.

Which operation feature is different between EIGRP and RIP? A) EIGRP uses periodic update timers. B) EIGRP sends broadcast updates to neighbors. C) EIGRP has a metric of hop count. D) EIGRP stores all routes learned from neighbors in a topology table.

EIGRP

Which protocol can support IPX and AppleTalk?

EIGRP

Which protocol uses PDMs?

DUAL (Diffusing Update Algorithm)

Which routing algorithm does IGRP and EIGRP use?