IP Routing Technologies - 2

drepitts8's version from 2016-02-07 05:11

Section 1

Question Answer
Which statement is true, as relates to classful or classless routing? Automatic summarization at classful boundaries can cause problems on discontigous networks.
Which statement describes an EIGRP feasible successor route?A backup route, added to the topology table
What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is in active state? It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.
Which commands are required to properly configure a router to run OSPF and to add network to OSPF area 0? Router(config)# router ospf 1 Router(config-router)# network area 0
The first command to start the OSPF routing process isRouter(config)#router ospf

Section 2

Question Answer
What are two enhancements that OSPFv3 supports over OSPFv2?It can support multiple IPv6 subnets on a single link. It routes over links rather than over networks.
A router receives information about network from multiple sources. What will the router consider the most reliable information about the path to that network?a directly connected interface with an address of
What are three characteristics of the OSPF routing protocol? It converges quickly. It uses cost to determine the best route. OSPF routers discover neighbors before exchanging routing information.
What is the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router? 4
When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?exstart state > exchange state > loading state > full state

Section 3

Question Answer
What are two drawbacks of implementing a link-state routing protocol?The requirement for a hierarchical IP addressing scheme for optimal functionality. The high demand on router resources to run the link-state routing algorithm.
The ip helper-address command does what? relays a DHCP request across networks.
What is the default administrative distance of the OSPF routing protocol?110
Which statements are true about EIGRP successor routes? A successor route is used by EIGRP to forward traffic to destination. A successor route may be backed up by a feasible successor route.
A router is running three routing processes: RIP, OSPF, and EIGRP, each configured with default characteristics. Each process learns a route to the same remote network. If there are no static routes to the destination and none of the routes wereredistributed, which route will be placed in the IP routing table? the route learned through EIGRP

Section 4

Question Answer
What OSPF command, when configured, will include all interfaces into area 0?network area 0
What are two benefits of using a single OSPF area network design? It reduces the types of LSAs that are generated. It removes the need for virtual links.
What does administrative distance refer to? a measure of the trustworthiness of a routing information source.
Which parameter or parameters are used to calculate OSPF cost in Cisco routers?Bandwidth
Which statements describe the routing protocol OSPF? It supports VLSM It confines network instability to one area of network It allows extensive control of the routing updates

Section 5

Question Answer
Which address are OSPF hello packets addressed to on point-to-point networks?
Which command enables IPv6 forwarding on a Cisco router? ipv6 unicast-routing
Cost A configurable value based by default on the bandwidth of the interface
LoadThe amount of activity on a network resource
BandwidthThe data capacity of a link

Section 6

Question Answer
ReliabilityUsually refers to the bit error rate of each network link
Hop countThe number of point-to-point links in a transmission path
Delay The amount of time required to move a packet from source to destination
Which is true about OSPF router-id? It is used for type 1 router LSA. Highest IP address of the loopback is used.
Which two statements describe the process identifier that is used in the command to configure OSPF on a router? Different process identifiers can be used to run multiple OSPF processes. The process number can be any number from 1 to 65,535.

Section 7

Question Answer
Which statement describes the process ID that is used to run OSPF on a router?It is locally significant and is used to identify an instance of the OSPF database.
RIP 120
Static route referencing IP address of next hop 1
Internal EIGRP route90
Directly connected network0

Section 8

Question Answer
Which two statements about the OSPF Router ID are true? t identifies the source of a Type 1 LSA. The router automatically chooses the IP address of a loopback as the OSPF Router ID.
What two things will a router do when running a distance vector routing protocol?Send periodic updates regardless of topology changes. Update the routing table based on updates from their neighbors.
OSPF routing uses the concept of areas. What are the characteristics of OSPF areas? Areas may be assigned any number from 0 to 65535 Area 0 is called the backbone area Multiple OSPF areas must connect to area 0
Holddown timerprevents a router from improperly reinstating a route from a regular routing update
Split horizonprevents information about a route from being sent in the direction from which the route was learned

Section 9

Question Answer
Defining a maximumprevents invalid updates from looping the internetwork indefinitely
Route poisoning causes a routing protocol to advertise an infinite metric for a failed route
Triggered update decreases convergence time by immediately sending route information in response to a topology change
A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?the EIGRP route
Which parameter can be tuned to affect the selection of a static route as a backup, when a dynamic protocol is also being used?Administrative distance

Section 10

Question Answer
A network administrator is troubleshooting an EIGRP problem on a router and needs to confirm the IP addresses of the devices with which the router has established adjacency. The retransmit interval and the queue counts for the adjacent routers also need to be checked. What command will display the required information? Router# show ip eigrp neighbors
Why do large OSPF networks use a hierarchical design?to confine network instability to single areas of the network. to speed up convergence. to reduce routing overhead.
On a live network, which commands will verify the operational status of router interfaces? Router# show interfaces Router# show ip interface brief
Which two are advantages of static routing when compared to dynamic routing?Security increases because only the network administrator may change the routing tables. Routing traffic load is reduced when used in stub network links
Which characteristics are representative of a link-state routing protocol?provides common view of entire topology. calculates shortest path. utilizes event-triggered updates.

Section 11

Question Answer
Holddown timerFor a given period, this causes the router to ignore any updates with poorer metrics to a lost network.
Poison reverse A router learns from its neighbor that a route is down, and the router sends an update back to the neighbor with an infinite metric to that route.
LSA The packets flooded when a topology change occurs, causing network routers to update flair topological databases and recalculate routes.
Split horizonThis prevents sending information about a route back out the same interface that originally learned about the route.
What is the default administrative distance of OSPF?110

Section 12

Question Answer
The command ip route 20 was performed on a router. No routing protocols or other static routes are configured on the router. Which statement best describes this command?Packets that are destined for host will be sent to
Which command is used to display the collection of OSPF link states?show ip ospf database
What command sequence will configure a router to run OSPF and add network /24 to area 0? router ospf 1 network area 0