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138 Cards in this Set
- Front
- Back
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A network administrator has just changed the router ID on a router that is working in an OSPFv2 environment. What should the administrator do to reset the adjacencies and use the new router ID? |
Issue the clear ip ospf process privileged mode command. |
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Refer to the exhibit. What three conclusions can be drawn from the displayed output? |
The DR can be reached through the GigabitEthernet 0/0 interface. There have been 9 seconds since the last hello packet sent. The router ID values were not the criteria used to select the DR and the BDR. |
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When checking a routing table, a network technician notices the following entry: O*E2 0.0.0.0/0 [110/1] via 192.168.16.3, 00:20:22, Serial0/0/0 What information can be gathered from this output? |
This route is a propagated default route. |
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Which command will a network engineer issue to verify the configured hello and dead timer intervals on a point-to-point WAN link between two routers that are running OSPFv2? |
show ip ospf interface serial 0/0/ |
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A network engineer has manually configured the hello interval to 15 seconds on an interface of a router that is running OSPFv2. By default, how will the dead interval on the interface be affected? |
The dead interval will now be 60 seconds. |
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Refer to the exhibit. An administrator is trying to configure R1 to run OSPFv3 but the neighbor adjacency is not forming with the router connected to Fa0/0. What is the cause of the problem? |
No router ID has been configured. |
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Refer to the exhibit. A network administrator has configured the OSPF timers to the values that are shown in the graphic. What is the result of having those manually configured timers? |
The R1 dead timer expires between hello packets from R2. |
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When OSPFv2 neighbors are establishing adjacencies, in which state do they elect a DR and BDR router? |
Two-Way state |
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Refer to the exhibit. R1 and R2 are connected to the same LAN segment and are configured to run OSPFv3. They are not forming a neighbor adjacency. What is the cause of the problem? |
The timer intervals of R1 and R2 do not match. |
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Refer to the exhibit. What kind of OSPF authentication has been configured on this interface? |
MD5 |
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Why is MD5 authentication more secure than simple authentication for OSPF updates? |
MD5 does not send the password to the neighbor router. |
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Which two pieces of information are used by the OSPF MD5 algorithm to generate a signature? |
secret key OSPF message |
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A network engineer is troubleshooting convergence and adjacency issues in an OSPFv2 network and has noted that some expected network route entries are not displayed in the routing table. Which two commands will provide additional information about the state of router adjacencies, timer intervals, and the area ID? |
show ip ospf neighbor show ip ospf interface |
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Why do OSPF serial interfaces usually require manual bandwidth configuration? |
OSPF uses the bandwidth value to compute routes for its routing table. |
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A network engineer is troubleshooting an OSPFv2 network and discovers that two routers connected by a point-to-point WAN serial link are not establishing an adjacency. The OSPF routing process, network commands and area ID are all confirmed as correct, and the interfaces are not passive. Testing shows that the cabling is correct, that the link is up, and pings between the interfaces are successful. What is most likely the problem? |
The subnet masks on the two connected serial interfaces do not match. |
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A network engineer is troubleshooting OSPFv2 routing issues on two connected routers. Which two requirements to form an adjacency need to be verified? |
Verify that the interfaces that connect the two routers are in the same area. Verify that the interfaces that connect the two routers are in the same subnet. |
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Which command is used to verify that OSPF is enabled and also provides a list of the networks that are being advertised by the network? |
show ip protocols |
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Refer to the exhibit. Four routers are connected to an Ethernet LAN segment and are configured to run OSPFv3. However, none of the routers are receiving routing updates. What is the cause of the problem? |
All of the routers have an OSPFv3 interface priority of 0. |
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Refer to the exhibit. These two routers are configured to run OSPFv3 but they are not forming a neighbor adjacency. What is the cause of the problem? |
The routers are configured with the same router ID. |
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A network engineer suspects that OSPFv3 routers are not forming neighbor adjacencies because there are interface timer mismatches. Which two commands can be issued on the interface of each OSFPv3 router to resolve all timer mismatches? |
no ipv6 ospf dead-interval no ipv6 ospf hello-interval |
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Refer to the exhibit. Fill in the blank. The command ”____” can be issued on router R2 to verify the propagation of a static default route from R1 to R2. |
show ip ospf neighbor |
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each OSPF state have a function what are they |
full state -> Routers have converged. loading state -> LSRs and LSUs are used to gain additional route information. ExStart state -> Master / slave relationships are negotiated. |
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OSPF election criterion has a sequential order for the OSPF DR and BDR election process. |
first -> Elect the router with the highest interface priority second -> Elect the router with the highest manually configured router ID. third -> Elect the router with the highest IPv4 address on loopback interfaces. fourth -> Elect the router with the highest active IPv4 address on physical interfaces. |
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What is a recommended method of authentication for OSPFv3? |
IPsec to secure routing updates |
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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 loses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged? |
Directly connected networks that are operational will be in the routing table. |
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During verification or troubleshooting of the OPSFv3 configuration on a router, which three parameters are displayed by the show ipv6 ospf interface command? |
the hello and dead intervals the OSPFv3 area that the interface is in the process ID that is assigned to the interface |
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The network administrator has been asked to summarize the routes for a new OSPF area. The networks to be summarized are 172.16.8.0, 172.16.10.0, and 172.16.12.0 with subnet masks of 255.255.255.0 for each network. Which command should the administrator use to forward the summary route for area 15 into area 0? |
area 15 range 172.16.8.0 255.255.248.0 |
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The ” _______ ” area interconnects with all other OSPF area types. |
backbone |
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what are the types ofOSPF routers |
backbone router -> a router in the backbone area internal router -> a router with all its interfaces in the same area Autonomous System Boundary Router -> a router that has at least one interface that is attached to a non-OSPF network Area Border Router -> a router with its interfaces attached to multiple areas |
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OSPF type 2 LSA messages are only generated by the ” ____ ” router to advertise routes in multiaccess networks. |
DR |
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What is one advantage of using multiarea OSPF? |
It improves the routing efficiency by reducing the routing table and link-state update overhead. |
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A network administrator is verifying a multi-area OSPF configuration by checking the routing table on a router in area 1. The administrator notices a route to a network that is connected to a router in area 2. Which code appears in front of this route in the routing table within area 1? |
O IA |
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Refer to the exhibit. What can be concluded about network 192.168.4.0 in the R2 routing table? |
The network was learned from a router within the same area as R2 |
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An ABR in a multiarea OSPF network receives LSAs from its neighbor that identify the neighbor as an ASBR with learned external networks from the Internet. Which LSA type would the ABR send to other areas to identify the ASBR, so that internal traffic that is destined for the Internet will be sent through the ASBR? |
LSA type 4 |
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Which three steps in the design and implementation of a multiarea OSPF network are considered planning steps? |
Define the OSPF parameters. Gather the required parameters. Define the network requirements. |
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An ASBR generates type ” ___ ” LSAs for each of its external routes and floods them into the area that it is connected to. |
5 |
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Refer to the exhibit. What is indicated by the O IA in the router output? |
The route was learned from another area |
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Which command can be used to verify the contents of the LSDB in an OSPF area? |
show ip ospf database |
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Which statement describes a multiarea OSPF network? |
It has a core backbone area with other areas connected to the backbone area. |
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Which characteristic describes both ABRs and ASBRs that are implemented in a multiarea OSPF network? |
They are required to perform any summarization or redistribution tasks. |
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Where can interarea route summarization be performed in an OSPF network? |
ABR |
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Refer to the exhibit. Which two statements are correct? |
To reach network 192.168.1.0, traffic will exit via the Serial0/0/0 interface. The routing table contains routes from multiple areas. |
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Which two statements correctly describe OSPF type 3 LSAs? |
Type 3 LSAs are used to update routes between OSPF areas. Type 3 LSAs are generated without requiring a full SPF calculation. |
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A network administrator is implementing OSPF in a portion of the network and must ensure that only specific routes are advertised via OSPF. Which network statement would configure the OSPF process for networks 192.168.4.0, 192.168.5.0, 192.168.6.0, and 192.168.7.0, now located in the backbone area, and inject them into the OSPF domain? |
r1(config-router)# network 192.168.4.0 0.0.3.255 area 0* |
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Which two networks are part of the summary route 192.168.32.0/22? |
192.168.35.0/24 192.168.33.0/24 |
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Refer to the exhibit. Fill in the blank. The “______” command must be issued to configure R1 for multiarea OSPF. |
network 192.168.10.128 0.0.0.127 area 1 |
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What routing table descriptor is used to identify OSPF summary networks that originate from an ABR? |
O IA |
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What is used to facilitate hierarchical routing in OSPF? |
the use of multiple areas |
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What type of OSPF LSA is originated by ASBR routers to advertise external routes? |
type 5 |
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What OSPF LSA type is used to inform routers of the router ID of the DR in each multiaccess network in an OSPF area? |
type 2 |
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Why do OSPF serial interfaces usually require manual bandwidth configuration? |
OSPF uses the bandwidth value to compute routes for its routing table. |
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After attempting to enter the configuration that is shown in router RTA, an administrator receives an error and users on VLAN 20 report that they are unable to reach users on VLAN 30. What is causing the problem? |
RTA is using the same subnet for VLAN 20 and VLAN 30. |
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A network administrator has been asked to summarize the networks shown in the exhibit as part of a multiarea OSPF implementation. All addresses are using a subnet mask of 255.255.255.0. What is the correct summarization for these eight networks? |
10.0.0.0 255.255.240.0 |
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Order the precedence in which an EIGRP router would choose the router ID. |
first -> eigrp router-id command second -> highest IPv4 address on loopback interfaces third -> highest IPv4 address on active physical interfaces |
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Refer to the exhibit. Which command should be used to configure EIGRP to only advertise the network that is attached to the gigabit Ethernet 0/1 interface? |
network 172.16.23.64 0.0.0.63 |
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What is the purpose of using protocol-dependent modules in EIGRP? |
to accommodate routing of different network layer protocols |
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Which statement describes a characteristic of the delivery of EIGRP update packets? |
EIGRP uses a reliable delivery protocol to send all update packets. |
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A new network administrator has been asked to verify the metrics that are used by EIGRP on a Cisco device. Which two EIGRP metrics are measured by using static values on a Cisco device? |
Bandwidth Delay |
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Which protocol is used by EIGRP to send hello packets? |
RTP |
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Which destination MAC address is used when a multicast EIGRP packet is encapsulated into an Ethernet frame? |
01-00-5E-00-00-0A |
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Match the correct version of EIGRP with the EIGRP features. |
EIGRP for IPv4 only -> source address for EIGRP messages is a routable address EIGRP for IPv6 only -> source address for EIGRP messages is a link-local address both EIGRP for IPv4 and EIGRP for IPv6 -> uses a 32-bit router ID |
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Refer to the exhibit. R2 has two possible paths to the 192.168.10.4 network. What would make the alternate route meet the feasibility condition? |
a reported distance less than 3523840 |
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If all router Ethernet interfaces in an EIGRP network are configured with the default EIGRP timers, how long will a router wait by default to receive an EIGRP packet from its neighbor before declaring the neighbor unreachable? |
15 seconds |
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Refer to the exhibit. Which two networks contain feasible successors? |
10.44.100.252 192.168.71.0 |
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Which command or commands must be entered on a serial interface of a Cisco router to restore the bandwidth to the default value of that specific router interface? |
no bandwidth |
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Which EIGRP route would have the preferred administrative distance? |
a summary route |
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How do EIGRP routers establish and maintain neighbor relationships? |
by exchanging hello packets with neighboring routers |
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When an EIGRP-enabled router uses a password to accept routes from other EIGRP-enabled routers, which mechanism is used? |
EIGRP authentication |
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What is indicated when an EIGRP route is in the passive state? |
The route is viable and can be used to forward traffic. |
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Which three metric weights are set to zero by default when costs in EIGRP are being calculated? |
k2 k4 k5 |
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Why would a network administrator use a wildcard mask in the network command when configuring a router to use EIGRP? |
to exclude some interfaces from the EIGRP process |
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Which table is used by EIGRP to store all routes that are learned from EIGRP neighbors? |
the topology table |
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Where are EIGRP successor routes stored? |
in the routing table and the topology table |
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Which command is used to display the bandwidth of an interface on an EIGRP-enabled router? |
show interfaces |
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In an EIGRP topology table, a route that is in a/an ” _____ ” state will cause the Diffusing Update Algorithm to send EIGRP queries that ask other routers for a path to this network. |
Active |
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EIGRP uses the _____ protocol to deliver EIGRP packets to neighbors. |
RTP |
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What information does EIGRP maintain within the routing table? |
only successors |
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R3 has two possible paths to the 172.16.99.0 network. What is the reported distance of the feasible successor route? |
2816 |
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Which two EIGRP packet types are sent with reliable delivery? |
hello acknowledgment |
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Which two EIGRP packet types are sent with unreliable delivery? |
hello acknowledgment |
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Which configuration is necessary to ensure successful operation of EIGRP for IPv6? |
The no shutdown command is required within the router configuration mode. |
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What is identified within the opcode of an EIGRP packet header? |
the EIGRP message type that is being sent or received from a neighbor |
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An administrator issues the router eigrp 100 command on a router. What is the number 100 used for? |
as the autonomous system number |
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What is the multicast address used by an EIGRP-enabled router operating with IPv6? |
FF02::A |
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Which command can be issued on a router to verify that automatic summarization is enabled? |
show ip protocols |
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Which address best summarizes the IPv6 addresses 2001:DB8:ACAD::/48, 2001:DB8:9001::/48, and 2001:DB8:8752::/49? |
2001:DB8:8000::/34 |
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In which IOS CLI mode must a network administrator issue the maximum-paths command to configure load balancing in EIGRP? |
router configuration mode |
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Two routers, R1 and R2, have established an EIGRP neighbor relationship, but there is still a connectivity problem. Which issue could be causing this problem? |
an access list that is blocking advertisements from other networks |
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In which scenario will the use of EIGRP automatic summarization cause inconsistent routing in a network? |
when the routers in an IPv4 network are connected to discontiguous networks with automatic summarization enabled |
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Two routers, R1 and R2, share a 64 kb/s link. An administrator wants to limit the bandwidth used by EIGRP between these two routers to 48 kb/s. Which command is used on both routers to configure the new bandwidth setting? |
ip bandwidth-percent eigrp 100 75 |
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Which three statements are advantages of using automatic summarization? |
It decreases the number of entries in the routing table. It reduces the frequency of routing updates. It ensures that traffic for multiple subnets uses one path through the internetwork. |
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What is a characteristic of manual route summarization? |
reduces total number of routes in routing tables |
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The ” __________ ” command causes an EIGRP router to stop sending hello packets through an interface. |
passive-interface |
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What is the command that should be issued on a router to verify that EIGRP adjacencies were formed? |
show ip eigrp neighbor |
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By default, how many equal-cost routes to the same destination network will EIGRP install in the routing table? |
4 |
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Which administrative distance is used to advertise routes learned from other protocols that are redistributed into EIGRP? |
170 |
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What is the purpose of a Null0 route in the routing table? |
to prevent routing loops |
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Which EIGRP parameter must match between all routers forming an EIGRP adjacency? |
autonomous system number |
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What two statements are correct regarding EIGRP authentication? |
EIGRP authentication uses the MD5 algorithm. EIGRP authentication uses a pre-shared key. |
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Which command would limit the amount of bandwidth that is used by EIGRP for protocol control traffic to approximately 128 Kb/s on a 1.544 Mb/s link? |
ip bandwidth-percent eigrp 100 8 |
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All networks are active in the same EIGRP routing domain. When the auto-summary command is issued on R3, which two summary networks will be calculated on R3? |
192.168.10.0/24 172.16.0.0/16 |
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Which two conclusions can be drawn from the exhibited configuration? |
Any EIGRP-learned route with a metric less than 3 times the successor metric will be installed in the local routing table. The configuration supports unequal-cost load balancing. |
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Router CiscoVille has been partially configured for EIGRP authentication. What is missing that would allow successful authentication between EIGRP neighbors? |
The keychain for EIGRP authentication must be configured on the interfaces. |
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Refer to the exhibit. All networks are active in the same EIGRP routing domain. When the auto-summary command is issued on R3, which two summary networks will be advertised to the neighbors? |
172.16.0.0/16 and 192.168.10.0/24 |
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Refer to the exhibit. A network administrator has attempted to implement a default route from R1 to the ISP and propagate the default route to EIGRP neighbors. Remote connectivity from the EIGRP neighbor routers to the ISP connected to R1 is failing. Based on the output from the exhibit, what is the most likely cause of the problem? |
The command redistribute static has not been issued on R1. |
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Refer to the exhibit. A network administrator has issued the shown commands. The EIGRP routing domain has completely converged and a network administrator is planning on configuring EIGRP authentication throughout the complete network. On which two interfaces should EIGRP authentication be configured between R2 and R3? |
serial 0/1/0 of R2 serial 0/0/1 of R3 |
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Refer to the exhibit. After the configuration shown is applied on router R1, the exhibited status message is displayed. Router R1 is unable to form a neighbor relationship with R2 on the serial 0/1/0 interface. What is the most likely cause of this problem? |
The IPv4 address configured on the neighbor that is connected to R1 serial 0/1/0 is incorrect. |
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Refer to the exhibit. A network administrator has configured EIGRP authentication between routers R1 and R2. After the routing tables are reviewed, it is noted that neither router is receiving EIGRP updates. What is a possible cause for this failure? |
The same autonomous system numbers must be used in the interface configurations of each router. |
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Refer to the exhibit. Which two routes will be advertised to the router ISP if autosummarization is disabled? |
10.1.2.0/24 10.1.4.0/30 |
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Refer to the exhibit. Which statement is supported by the output? |
A default route is being learned through an external process. |
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Refer to the exhibit. Which statement accurately reflects the configuration of routing on the HQ router? |
A static default route was configured on this router. |
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Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor adjacency.What action should be taken to solve this problem? |
Configure both routers with the same EIGRP process ID. |
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Refer to the exhibit. Remote users are experiencing connectivity problems when attempting to reach hosts in the 172.21.100.0 /24 network. Using the output in the exhibit, what is the most likely cause of the connectivity problem? |
The GigabitEthernet 0/1 interface is not participating in the EIGRP process. |
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Refer to the exhibit. Considering that R2, R3, and R4 are correctly configured, why did R1 not establish an adjacency with R2, R3, and R4? |
because the Fa0/0 interface of R1 is declared as passive for EIGRP |
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Refer to the exhibit. Router R3 is receiving multiple routes through the EIGRP routing protocol. Which statement is true about the implementation of summarization in this network? |
Automatic summarization is disabled on R3. |
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Beginning with the Cisco IOS Software Release 15.0, which license is a prerequisite for installing additional technology pack licenses? |
IPBase |
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When a router is powered on, where will the router first search for a valid IOS image to load by default? |
flash memory |
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What statement describes a Cisco IOS image with the “universalk9_npe” designation for Cisco ISR G2 routers? |
It is an IOS version that, at the request of some countries, removes any strong cryptographic functionality. |
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Which statement describes a difference between the IOS 15.0 extended maintenance release and a standard maintenance release? |
The standard maintenance release enables faster IOS feature delivery than the extended maintenance release does. |
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A network administrator configures a router with the command sequence: R1(config)# boot system tftp://c1900-universalk9-mz.SPA.152-4.M3.bin R1(config)# boot system rom What is the effect of the command sequence? |
The router will load IOS from the TFTP server. If the image fails to load, it will load the IOS image from ROM. |
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Which three images are considered premium software packages for Cisco IOS Release 12.4? |
Enterprise Services Advanced IP Services Advanced Enterprise Services |
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The license ” ____ ” flash0:seck9-C1900-SPE150_K9-FAB12340099.xml command will restore the specified saved Cisco IOS Release 15 license to a router. |
install |
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Which IOS 12.4 software package integrates full features, including voice, security, and VPN capabilities, for all routing protocols? |
Advanced Enterprise Services |
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Which command would a network engineer use to find the unique device identifier of a Cisco router? |
show license udi |
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A network technician is troubleshooting problems with a router that is running IOS 15. Which command will display the features activated for the licenses that are installed on the router? |
show license |
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Which command is used to configure a one-time acceptance of the EULA for all Cisco IOS software packages and features? |
license accept end user agreement |
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When a customer purchases a Cisco IOS 15.0 software package, what serves as the receipt for that customer and is used to obtain the license as well? |
Product Activation Key |
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What is the major release number in the IOS image name c1900-universalk9-mz.SPA.152-3.T.bin? |
15 |
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What is the purpose of a T train release in Cisco IOS 15? |
It provides regular bug fix maintenance rebuilds, plus critical fix support for network-affecting bugs |
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What code in the Cisco IOS 15 image filename c1900-universalk9-mz.SPA.153-3.M.bin indicates that the file is digitally signed by Cisco? |
spa |
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How long is the evaluation license period for Cisco IOS Release 15.0 software packages? |
60 days |
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A network engineer is upgrading the Cisco IOS image on a 2900 series ISR. What command could the engineer use to verify the total amount of flash memory as well as how much flash memory is currently available? |
show flash0: |
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Which two conditions should the network administrator verify before attempting to upgrade a Cisco IOS image using a TFTP server? |
Verify connectivity between the router and TFTP server using the ping command. Verify that there is enough flash memory for the new Cisco IOS image using the show flash command. |
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specifying the feature set -> universalk9 minor release number -> 1 where the image runs and if the file is compressed -> mz platform on which the image runs -> c1900 maintanence release and rebuild number -> M4 new feature release number -> 4 file extension -> bin major release number -> 15 |
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Technology Train: |
Branches from another train has the lastest features *confederation line |
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Mainline train |
Possibly is 12.4 contains mostly bug fixes *trillium line |
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In addition to IPBase, what are the three technology packs that are shipped within the universal Cisco IOS Software Release 15 image? |
Unified Communications Security DATA |
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Which of the three Cisco IOS images shown will load into RAM? |
The router selects an image depending on the boot system command in the configuration |
