CCNA 3 Chapter 5 Exam Answers
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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?
RIP
BGP
OSPF
EIGRP*
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Which routing protocol sends a routing update to neighboring routers every 30 seconds?
RIP*
BGP
OSPF
EIGRP
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Which statement is an incorrect description of the OSPF protocol?
Multiarea OSPF helps reduce the size of the link-state database.
When compared with distance vector routing protocols, OSPF utilizes less memory and less CPU processing power.*
OSPF builds a topological map of the network.
OSPF has fast convergence.
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Which routing protocol is designed to use areas to scale large hierarchical networks?
RIP
OSPF*
EIGRP
BGP
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Which routing protocol uses link-state information to build a map of the topology for computing the best path to each destination network?
RIP
RIPng
OSPF*
EIGRP
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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?
IS-IS
RIPv1
RIPv2
EIGRP*
OSPF
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Which dynamic routing protocol was developed as an exterior gateway protocol to interconnect different Internet providers?
EIGRP
RIP
OSPF
BGP *
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What happens when two link-state routers stop receiving hello packets from neighbors?
They create a default route to the adjacent router.
They continue to operate as normal and are able to exchange packets.
They consider the neighbor to be unreachable and the adjacency is broken.*
They will flood their database tables to each other.
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What are two features of the OSPF routing protocol? (Choose two.)
has an administrative distance of 100
used primarily as an EGP
uses Dijkstra’s algorithm to build the SPF tree*
automatically summarizes networks at the classful boundaries
calculates its metric using bandwidth*
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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
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What is the difference between interior and exterior routing protocols?
Interior routing protocols are used to route on the Internet. Exterior routing protocols are used inside organizations.
Exterior routing protocols are used only by large ISPs. Interior routing protocols are used by small ISPs.
Exterior routing protocols are used to administer a single autonomous system. Interior routing protocols are used to administer several domains.
Interior routing protocols are used to communicate within a single autonomous system. Exterior routing protocols are used to communicate between multiple autonomous systems.*
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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 traffic and probability of failure of links.
The amount of packet delivery time and slowest bandwidth.
The number of hops along the routing path.
The cumulative bandwidth that is used along the routing path. *
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Refer to the exhibit. A network administrator has configured RIPv2 in the given topology. Which path would a packet take to get from the LAN that is connected to R1 to the LAN that is connected to R7?
R1–R3–R4–R5–R6–R7
R1–R4–R5–R6–R7
R1–R2–R6–R7*
R1–R3–R2–R6–R7
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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.)
hellos
query
aging information*
sequence numbers*
acknowledgements
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What are two purposes of dynamic routing protocols? (Choose two.)
discover remote networks *
provide network security
reduce network traffic
provide a default route to network hosts
select best path to destination networks*
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What is the first step taken by a newly configured OSPF router in the process of reaching a state of convergence?
It floods LSP packets to neighboring routers.
It builds the topological database.
It learns about directly connected links in an active state.*
It exchanges hello messages with a neighboring router.
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Refer to the exhibit. OSPF is used in the network. Which path will be chosen by OSPF to send data packets from Net A to Net B?
R1, R2, R5, R7
R1, R4, R6, R7
R1, R3, R5, R7*
R1, R3, R5, R6, R7
R1, R3, R6, R7
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In the context of routing protocols, what is a definition for time to convergence?
a measure of protocol configuration complexity
the amount of time a network administrator needs to configure a routing protocol in a small- to medium-sized network
the amount of time for the routing tables to achieve a consistent state after a topology change *
the capability to transport data, video, and voice over the same media
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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 determined the costs associated with its active links.*
The router has established its adjacencies.*
The router has built its link-state database.
The routing table has been refreshed.
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Which two routing protocols are classified as distance vector routing protocols?
(Choose two.)
EIGRP*
RIP*
BGP
OSPF
IS-IS
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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
the requirement to periodically flood link-state packets to all neighbors
a change in the topology*
the initial startup of the routing protocol process*
a link to a neighbor router has become congested
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Which feature provides secure routing updates between RIPv2 neighbors?
keepalive messages
routing protocol authentication*
adjacency table
unicast updates
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Which two protocols are link-state routing protocols? (Choose two.)
OSPF*
EIGRP
RIP
IS-IS*
BGP
IGP
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What is a disadvantage of deploying OSPF in a large single area routing environment?
OSPF uses a topology database of alternate routes.
OSPF uses excessive LSP flooding.*
OSPF uses a metric of bandwidth and delay.
OSPF uses multicast updates.
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Question as presented:
