Refer to the exhibit. The network administrator issues the command no ip classless on Router1. What forwarding action will take place on a packet that is received by Router1 and is destined for host 192.168.0.26?

.****The packet will be dropped

The packet will be forwarded to the gateway of last resort.

The packet will match the 192.168.0.0 network and be forwarded out Serial 0/0.

The packet will most closely match the 192.168.0.8 subnet and be forwarded out Serial 0/1.

Refer to the exhibit. What does the "O*E2" from the "O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0" line represent?

an external OSPF route that will not increment in cost.

Refer to the exhibit. What is the cost of the route to the 10.0.0.0 network?

1786

What three parameters must be indentical between OSPF routers in order to form an adjacency? (Choose three.)

area id

hello interval

network type

What does OSPF use to reduce the number of exchanges of routing information in networks where large numbers of neighbors are present? (Choose two.)

designated router

backup designated router

What does OSPF use to calculate the cost to a destination network?

bandwidth

A fully converged five router OSPF network has been running successfully for several weeks. All configurations have been saved and no static routes are used. If one router looses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged?

Routes for connected networks that are operational will be in the routing table.

Refer to the exhibit. Router A is correctly configured for OSPF. Which OSPF configuration statement or set of statements was entered for router B to generate the exhibited routing table?

B(config-router)# network 192.168.1.0 0.0.0.3 area 0

Refer to the exhibit. Which network command or set of sommands will cause OSPF to be enabled to send and receive packets for any R1 interface in the exhibited subnets?

R1(config-router)# network 0.0.0.0 255.255.255.255 area 0

Refer to the exhibit. What does the "2" stand for in the router ospf 2 statement?

The number 2 identifies this particular instance of OSPF on this router.

Refer to the exhibit. All routers have been configured with the interface priorities that are shown. All routers were restarted simultaneously. The results of the DR/BDR election are shown. What can be concluded about this network?

The highest router ID was most likely determined via an OSPF router-id statement or statements.

Refer to the exhibit. What configuration statements would give the results that are shown in the output of the show ip protocols command?

B(config)# router ospf 1
B(config-router)# router-id 192.168.1.5

Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network?

6

What is the default administrative distance for OSPF?

110

Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router IDs and OSPF interface priorities. Loopback interfaces are not configured and all interfaces are operational. Router D is the DR and router C is the BDR.
What happens immediately after the following commands are entered on router A?

A(config)# interface fa0/0

A(config-if)# ip ospf priority 255

D will remain the DR. C will remain the BDR.

Refer to the exhibit. All routers are running OSPF. What cost would JAX put in its routing table for the 10.0.0.0/24 network?

1787

What range of networks will be advertised in the OSPF updates by the command Router1(config-router)# network 192.168.0.0 0.0.15.255 area 100?

192.168.0.0/24 through 192.168.15.0/24

Refer to the exhibit. The network administrator wants to set the router ID of Router1 to 192.168.100.1. What steps must the administrator take to accomplish this?

nothing, the router-id of Router1 is already 192.168.100.1

Refer to the exhibit. When OSPF is operational in the exhibited network, what neighbor relationship is developed between Router1 and Router2?

A FULL adjacency is formed.

Refer to the exhibit. Assuming that the routers have default interface OSPF priorities and no configured loopback interfaces, what two roles will router B play on each network segment? (Choose two.)

DR for network 192.168.1.200

BDR for network 192.168.1.204

Refer to the exhibit. Router1 and Router2 are running OSPF. The show ip ospf neighbor command reveals no neighbors. What is a possible cause?

OSPF hello or dead timers do not match.

Refer to the exhibit. Which command sequence on RouterB will redistribute a gateway of last resort to the other routers in OSPF area 0?

RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
RouterB(config)# router ospf 10
RouterB(config-router)# default-information originate

Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running OSPF on their Ethernet interfaces. Router D was just added to the network. Routers are configured with the loopback interfaces (Lo 0) that are shown in the exhibit. What happens to the OSPF DR/BDR after RouterD is added to the network?

There is no change in the DR or BDR until either current DR or BDR goes down.

Which two statements describe the use of OSPF DR/BDR elections? (Choose two.)

Elections are required in broadcast multiaccess networks.

Elections are required in non-broadcast multiaccess networks.

Refer to the exhibit. The routers in the exhibit are using default OSPF configuration settings to advertise all attached networks. If all of the routers start at the same time, what will be the result of the DR and BDR elections for this single area OSPF network? (Choose three.)

Router A will be DR for 10.4.0.0/16.

HQ will be BDR for 10.4.0.0/16.

Remote will be DR for 10.5.0.0/16.

Refer to the exhibit. What must be received between neighbors to prevent the dead time that is shown in the exhibit from reaching zero?

hello packets

Refer to the exhibit. When Router D is configured to use a link-state routing protocol and is added to the network, what is the first thing that it does to begin learning the network topology?

It learns about its directly connected networks when its interfaces reach the up state.

What two events will cause a link state router to send LSPs to all neighbors? (Choose two.)

whenever the network topology changes

upon initial startup of router or routing protocol

What is the final step in the link state routing process?

SPF computes best path to each destination network

What two statements correctly describe the link state routing process? (Choose two.)

each router in the area floods LSPs to all neighbors

all routers in the area have identical link state databases

Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL?

cost of the link

What feature do modern link-state protocols provide to minimize processing and memory requirements?

splitting routing topologies into smaller areas

To achieve network convergence, what three steps does each link state router take? (Choose three.)

build a Link State Packet (LSP) containing the state of each directly connected link

flood the LSP to all neighbors, who then store all LSPs received in a database

construct a complete map of the topology and compute the best path to each destination network

What speeds up convergence in a network using link-state routing?

updates triggered by network changes

Why is it difficult for routing loops to occur in networks that use link-state routing?

Each router builds a complete and synchronized view of the network.

What are some of the advantages of using a link-state routing protocol instead of a distance vector routing protocol? (Choose two.)

Routers have direct knowledge of all links in the network and how they are connected.

After the inital LSA flooding, they generally require less bandwidth to communicate changes in a topology.

Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks?

Dijkstra

Refer to the exhibit. Which statement correctly describes the path traffic would take from the 10.0.0.0/24 network to the 192.168.1.0/24 network if a link-state routing protocol was in use?

BOS -> ORL -> JAX -> ATL because this path is the lowest cost

Which database or table must be identical on all link-state routers within an area in order to construct an accurate SPF tree?

link-state database

Which two routing protocols use Dijkstra’s shortest path first algorithm? (Choose two.)

IS-IS

OSPF

When are link-state packets sent to neighbors?

when a link goes up or down

Refer to the exhibit. What does JAX do with link-state packets from ORL?

sends out the individual link-state packets out the interface connected to BOS

A new network administrator is given the task of selecting an appropriate dynamic routing protocol for a software development company. The company has over 100 routers, uses CIDR and VLSM, requires fast convergence, and uses both Cisco and non-Cisco equipment. Which routing protocol is appropriate for this company?

OSPF

What action does a link-state router take immediately upon receipt of an LSP from a neighboring router?

floods the LSP to neighbors

Refer to the exhibit. If all routers and interfaces are configured to use a link-state routing protocol, from which routers will router D receive hello packets?

B and C

On a router running EIGRP, what database would maintain a list of feasible successors?

topology table

Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They are not forming an adjacency. What is the cause?

network 192.168.1.64 0.0.0.3

What two actions will the EIGRP DUAL FSM take if a link to a network goes down? (Choose two.)

query neighbors for a new route

search topology table for a feasible successor

Refer to the exhibit. What is indicated by the P at the beginning of the topology entry?

the route is in a stable state

In which of the following tables does the EIGRP DUAL algorithm store the primary route to a destination? (Choose two.)

routing

topology

What information is maintained in the EIGRP topology database for a destination route? (Choose three.)

the routing protocol

the feasible distance of the route

the route cost as advertised by the neighboring router

Which of the following statements describes the bounded updates used by EIGRP?

Partial updates are sent only to routers that need the information.

Which of the following types of routes will be denoted by EX in EIGRP routing table entries? (Choose two.)

routes learned from other routing protocols

EIGRP routes that originate in different autonomous systems

Host 192.168.1.66 in the network illustrated is unable to ping host 192.168.1.130. How must EIGRP be configured to enable connectivity between the two hosts? (Choose two.)

R1(config-router)# no auto-summary

R2(config-router)# no auto-summary

Which two statements describe characteristics of EIGRP? (Choose two.)

EIGRP is a distance vector routing protocol.

EIGRP supports classless routing and VLSM.

Refer to the exhibit. Based on the output of show ip eigrp neighbors, what are two possible problems with adjacencies between Router1 and Router2? (Choose two.)

The routers are configured with different EIGRP process IDs.

The serial interfaces for both routers are in different networks.

Refer to the exhibit. In the topology table, what do the numbers 3011840 and 3128695 represent?

the total metric for that network as advertised by the EIGRP neighbor

Refer to the exhibit. EIGRP is the only routing protocol enabled on this network. No static routes are configured on this router. What can be concluded about network 198.18.1.0/24 from the exhibited output?

Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6.

Refer to the exhibit. All interfaces have been configured with the bandwidths that are shown in the exhibit. Assuming that all routers are using a default configuration of EIGRP as their routing protocol, what path will packets take from the 172.16.1.0/16 network to the 192.168.200.0/24 network?

A,B,E

By default, which two metrics are used by EIGRP to determine the best path between networks?

delay

bandwidth

Which term defines a collection of networks under the administrative control of a single entity that presents a common routing policy to the Internet?

autonomous system

Refer to the exhibit. The company is using EIGRP with an autonomous system number of 10. Pings between hosts on networks that are connected to router A and those that are connected to router B are successful. However, users on the 192.168.3.0 network are unable to reach users on the 192.168.1.32 network. What is the most likely cause of this problem?

The routers are not configured in the same EIGRP routing domain.

In the command router eigrp 20, what is the purpose of the number 20?

identifies the autonomous system number this EIGRP process will advertise

The show ip eigrp topology command output on a router displays a successor route and a feasible successor route to network 192.168.1.0/24. In order to reduce processor utilization, what does EIGRP do when the primary route to this network fails?

The backup route to network 192.168.1.0/24 is installed in the routing table.

What administrative distance would a router assign to a default route in EIGRP that is learned from a source external to the autonomous system?

170

Refer to the exhibit. Network 192.168.0.0/28 goes down. What type of packet does Router2 immediately send to Router1 and Router3?

unicast update packets to 192.168.1.1 and 192.168.2.1

Refer to the exhibit. What can be determined from this output?
All of the routes listed are network routes.

Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the static route in the routing table that matches the destination network for this packet, what does the router do next?
performs a recursive lookup to find the exit interface used to forward the packet

Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?
172.16.0.0/16

The following entry is displayed in the routing table:
R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1
What type of route is this?
a level 1 ultimate network route

Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator need to do so that packets for unknown child routes of 172.16.0.0/24 will not be dropped?
do nothing, ip classless is on by default

Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?
use the default route

Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?
7

Refer to the exhibit. With the ip classless command issued, what will router R2 do with a packet destined for host 172.16.4.234?
send packet out Serial 0/0/1

Refer to the exhibit. Which statement correctly describes this network?
There is at least one parent and one child route

Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10?
forward out interface Serial0/0/1

Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being dropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1?
ip classless
A router has the following entries in its routing table:
S 192.168.0.0/24 [1/0] via 192.168.128.2
O 192.168.0.0/25 [110/2175] via 172.16.1.1, 00:02:15, FastEthernet0/1
D 192.168.0.0/25 [90/22455] via 172.16.2.2, 00:12:15, Serial0/0/0
R 192.168.0.0/26 [120/2] via 172.16.3.3, 00:00:15, Serial0/0/1
The router receives a packet that is destined for a host with the address 192.168.0.58. Which route would this router use to forward the packet?
the RIP route

What determines if the router implements a classless route lookup process?
Multiple routes with different masks to the same destination are in the routing table.

What occurs when no ip classless is implemented on the router?
The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.

Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet to forward. Which route in the routing table will be searched
first and why?
172.16.0.0/25 because it is the first level 1 route

A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table?
the route with the longest address and mask match to the destination

Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network?
255.255.255.0

Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4?
RIPv2

A route to a destination network is learned from multiple routing protocols. What is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table?
administrative distance