Test
CCNA 3 Practice Quiz
Preguntas del test (63)
1Which technology is required when switched networks are designed to include redundant links?
- ASpanning Tree Protocol
- Bvirtual LANs
- Clink aggregation
- Dvirtual private networks
2Which protocol provides up to 16 instances of RSTP, combines many VLANs with the same physical and logical topology into a common RSTP instance, and provides support for PortFast, BPDU guard, BPDU filter, root guard, and loop guard?
- ASTP
- BRapid PVST+
- CPVST+
- DMST
3Which statement describes a characteristic of Cisco Meraki switches?
- AThey are service provider switches that aggregate traffic at the edge of the network.
- BThey are cloud-managed access switches that enable virtual stacking of switches.
- CThey are campus LAN switches that perform the same functions as Cisco 2960 switches.
- DThey promote infrastructure scalability, operational continuity, and transport flexibility.
4If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?
- Ahighest IP address
- Blowest MAC address
- Clowest IP address
- Dhighest MAC address
5What is a characteristic of a Layer 2 loop?
- AA switch is continually forwarding the same unicast frame.
- BBroadcast frames are forwarded back to the sending switch.
- CRouters continually forward packets to other routers.
- DThe Time-to-Live attribute of a frame is set to infinity.
6Which two network design features require Spanning Tree Protocol (STP) to ensure correct network operation? (Choose two.)
- Aredundant links between Layer 2 switches
- Bremoving single points of failure with multiple Layer 2 switches
- Clink-state dynamic routing that provides redundant routes
- Dstatic default routes
- Eimplementing VLANs to contain broadcasts
7In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose two.)
- Alistening
- Blearning
- Cforwarding
- Ddisabled
- Eblocking
8Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?
- Aroot port
- Bdisabled port
- Calternate
- Ddesignated port
9What is an advantage of using LACP?
- Adecreases the chance of a spanning-tree loop
- Bprovides a simulated environment for testing link aggregation
- Callows automatic formation of EtherChannel links
- Ddecreases the amount of configuration that is needed on a switch for EtherChannel
- Eincreases redundancy to Layer 3 devices
10Which command will initiate EtherChannel interface configuration mode?
- Ainterface port-channel interface-identifier
- Binterface interface-identifier
- Cinterface range interface-identifier
- Dchannel-group group-identifier
11Which PAgP mode combination will establish an EtherChannel?
- Aswitch 1 set to desirable; switch 2 set to desirable.
- Bswitch 1 set to on; switch 2 set to desirable.
- Cswitch 1 set to auto; switch 2 set to auto.
- Dswitch 1 set to auto; switch 2 set to on.
12When a range of ports is being configured for EtherChannel by the use of PAgP, which mode will form the bundled channel only if the port receives PAgP packets from another device?
- Aactive
- Bdesirable
- Cauto
- Dpassive
13When a range of ports is being configured for EtherChannel, which mode will configure LACP so that it initiates the EtherChannel negotiation?
- Adesirable
- Bauto
- Cactive
- Dpassive
14What type of wireless antenna is best suited for providing coverage in large open spaces, such as hallways or large conference rooms?
- AYagi
- Bomnidirectional
- Cdirectional
- Ddish
15During which stage of establishing connectivity between a WLAN client and an AP does the client learn the MAC address of the AP?
- Aencryption
- Bauthentication
- Cdiscovery
- Dassociation
- Eprobing
16A 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?
- AIssue the clear ip ospf process privileged mode command.
- BConfigure the network statements.
- CChange the OSPFv2 process ID.
- DChange the interface priority.
17Refer to the exhibit. What three conclusions can be drawn from the displayed output? (Choose three.)
- AThe DR can be reached through the GigabitEthernet 0/0 interface.
- BThere have been 9 seconds since the last hello packet sent.
- CThe router ID on the DR router is 3.3.3.3
- DThe BDR has three neighbors.
- EThe router ID values were not the criteria used to select the DR and the BDR.
- FThis interface is using the default priority.
18Which 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?
- Ashow ipv6 ospf interface serial 0/0/0
- Bshow ip ospf neighbor
- Cshow ip ospf interface serial 0/0/0
- Dshow ip ospf interface fastethernet 0/1
19Refer 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?
- AThe R1 dead timer expires between hello packets from R2.
- BThe neighbor adjacency has formed.
- CR1 automatically adjusts its own timers to match the R2 timers.
- DThe hello timer on R2 expires every ten seconds.
20A 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? (Choose two.)
- Ashow running-configuration
- Bshow ip ospf neighbor
- Cshow ip ospf interface
- Dshow ip route ospf
- Eshow ip protocols
21A 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?
- AA clock rate has not been set on the DCE interface of the serial link.
- BThe OSPFv2 process IDs on each router do not match.
- CA DR election has not taken place.
- DThe subnet masks on the two connected serial interfaces do not match.
22A network engineer is troubleshooting OSPFv2 routing issues on two connected routers. Which two requirements to form an adjacency need to be verified? (Choose two.)
- AVerify that the interfaces that connect the two routers are in the same area.
- BVerify that one of the routers is the DR or BDR and the other router a DRother.
- CVerify that one of the interfaces that connects the two routers is active and the other passive.
- DVerify that the interfaces that connect the two routers are in the same subnet.
- EVerify that both routers are using the same OSPFv2 process ID.
23Which command is used to verify that OSPF is enabled and also provides a list of the networks that are being advertised by the network?
- Ashow ip protocols
- Bshow ip ospf interface
- Cshow ip interface brief
- Dshow ip route ospf
24Refer 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?
- AThe routers are using IPv6 link local addresses to communicate.
- BThe network type has been set to BROADCAST instead of NBMA.
- CThe routers are using IPv4 addresses for router IDs.
- DAll of the routers have an OSPFv3 interface priority of 0.
25Refer 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?
- AThe routers do not have global IPv6 addresses that are configured on the Fa0/0 interfaces.
- BThe routers have both been elected as the DR.
- CThe routers are configured with the same router ID.
- DThe routers have the same priority.
26What is a recommended method of authentication for OSPFv3?
- AMD5 authentication
- BIPsec to secure routing updates
- Cthe passive-interface command
- Da VPN tunnel between each OSPF neighbor adjacency
27During verification or troubleshooting of the OPSFv3 configuration on a router, which three parameters are displayed by the show ipv6 ospf interface command? (Choose three.)
- Athe hello and dead intervals
- Bthe metric of the route that is attached to the interface
- Cthe global unicast IPv6 address of the interface
- Dthe number of interfaces in the area
- Ethe OSPFv3 area that the interface is in
- Fthe process ID that is assigned to the interface
28Refer to the exhibit. What can be concluded about network 192.168.4.0 in the R2 routing table?
- AThis network should be used to forward traffic toward external networks.
- BThe network was learned from a router within the same area as R2.
- CThe network was learned through summary LSAs from an ABR.
- DThe network can be reached through the GigabitEthernet0/0 interface.
29Refer to the exhibit. What is indicated by the O IA in the router output?
- AThe route was learned from within the area.
- BThe route was learned from outside the internetwork.
- CThe route was manually configured.
- DThe route was learned from another area.
30Which statement describes a multiarea OSPF network?
- AIt has a core backbone area with other areas connected to the backbone area.
- BIt has multiple routers that run multiple routing protocols simultaneously, and each protocol consists of an area.
- CIt consists of multiple network areas that are daisy-chained together.
- DIt requires a three-layer hierarchical network design approach.
31A 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?
- Ar1(config-router)# network 192.168.0.0 0.0.0.255 area 1
- Br1(config-router)# network 192.168.4.0 0.0.255.255 area 0
- Cr1(config-router)# network 192.168.4.0 0.0.15.255 area 1
- Dr1(config-router)# network 192.168.0.0 0.0.3.255 area 0
- Er1(config-router)# network 192.168.4.0 0.0.3.255 area 0
- Fr1(config-router)# network 192.168.4.0 0.0.3.255 area 1
32Which two networks are part of the summary route 192.168.32.0/22? (Choose two.)
- A192.168.35.0/24
- B192.168.36.0/24
- C192.168.33.0/24
- D192.168.31.0/24
- E192.168.37.0/24
- F192.168.38.0/24
33What routing table descriptor is used to identify OSPF summary networks that originate from an ABR?
- AO E1
- BO E2
- CO
- DO IA
34A 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? (Choose two.)
- Abandwidth
- BMTU
- Cdelay
- Dload
- Ereliability
35If 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?
- A10 seconds
- B15 seconds
- C20 seconds
- D30 seconds
36Which EIGRP route would have the preferred administrative distance?
- Aa summary route
- Ban internal route
- Can external route that is redistributed from RIP
- Dan external route that is redistributed from OSPF
37When an EIGRP-enabled router uses a password to accept routes from other EIGRP-enabled routers, which mechanism is used?
- AEIGRP authentication
- BDiffusing Update Algorithm
- CReliable Transport Protocol
- Dbounded updates
- Epartial updates
38Where are EIGRP successor routes stored?
- Aonly in the routing table
- Bin the routing table and the topology table
- Conly in the neighbor table
- Din the routing table and the neighbor table
39Which command is used to display the bandwidth of an interface on an EIGRP-enabled router?
- Ashow ip protocols
- Bshow interfaces
- Cshow ip interface brief
- Dshow ip route
40 What information does EIGRP maintain within the routing table?
- Aonly feasible successors
- Badjacent neighbors
- Conly successors
- Dall routes known to the router
- Eboth successors and feasible successors
41Which command can be issued on a router to verify that automatic summarization is enabled?
- Ashow ip eigrp neighbors
- Bshow ip protocols
- Cshow ip interface brief
- Dshow ip eigrp interfaces
42Refer 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?
- AAutomatic summarization has been enabled only for the 172.21.100.0/24 network.
- BAutomatic summarization is enabled on neighboring routers.
- CAutomatic summarization is disabled on a per-interface basis.
- DAutomatic summarization is disabled on R3.
43Refer to the exhibit. Considering that R2, R3, and R4 are correctly configured, why did R1 not establish an adjacency with R2, R3, and R4?
- Abecause the automatic summarization is enabled on R1
- Bbecause the IPv4 address on Fa0/0 interface of R1 is incorrect
- Cbecause the Fa0/0 interface of R1 is declared as passive for EIGRP
- Dbecause there is no network command for the network 192.168.1.0/24 on R1
44In which IOS CLI mode must a network administrator issue the maximum-paths command to configure load balancing in EIGRP?
- Arouter configuration mode
- Binterface configuration mode
- Cglobal configuration mode
- Dprivileged mode
45Two routers, R1 and R2, have established an EIGRP neighbor relationship, but there is still a connectivity problem. Which issue could be causing this problem?
- Aa process ID mismatch
- Ban authentication mismatch
- Can access list that is blocking advertisements from other networks
- Dautomatic summarization that is disabled on both routers
46Refer 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?
- AThe GigabitEthernet 0/1 interface is not participating in the EIGRP process.
- BThe hello timer has been modified on interface GigabitEthernet 0/1 of R3 and not on the neighbor, causing a neighbor adjacency not to form.
- CThe passive-interface command is preventing neighbor relationships on interface GigabitEthernet 0/0.
- DThe GigabitEthernet interfaces are not limiting the flow of EIGRP message information and are being flooded with EIGRP traffic.
47Refer 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?
- AConfigure the same hello interval between the routers.
- BConfigure EIGRP to send periodic updates.
- CEnable the serial interfaces of both routers.
- DConfigure both routers with the same EIGRP process ID.
48Refer to the exhibit. Which statement is supported by the output?
- AThe route to 192.168.1.1 represents the configuration of a loopback interface.
- BA static default route has been manually configured on this router.
- CA default route is being learned through an external process.
- DSummarization of routes has been manually configured.
49
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?
- AThe same autonomous system numbers must be used in the interface configurations of each router.
- BThe key string should be used in interface mode instead of the key chain.
- CThe same number of key strings must be used on each router.
- DThe same key chain name must be used on each router.
- EThe authentication configuration is correct, issue the show ip eigrp neighbors command to troubleshoot the issue.
50Two 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?
- Aip bandwidth-percent eigrp 100 48
- Bip bandwidth-percent eigrp 100 75
- Cip bandwidth-percent eigrp 75 100
- Dip bandwidth-percent eigrp 64 48
- Eip bandwidth-percent eigrp 100 64
51Which three statements are advantages of using automatic summarization? (Choose three.)
- AIt decreases the number of entries in the routing table.
- BIt reduces the frequency of routing updates.
- CIt ensures that traffic for multiple subnets uses one path through the internetwork.
- DIt maximizes the number of routes in the routing table.
- EIt improves reachability in discontiguous networks.
- FIt increases the size of routing updates.
52Refer 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?
- AThe passive-interface command should have been issued on serial 0/1/0.
- BThe IPv4 address configured on the neighbor that is connected to R1 serial 0/1/0 is incorrect.
- CThe hello interval has been altered on serial 0/1/0 and is preventing a neighbor relationship from forming.
- DThe network statement used for EIGRP 55 does not enable EIGRP on interface serial 0/1/0.
- EThe networks that are configured on serial 0/0/0 and serial 0/1/0 of router R1 are overlapping.
53What is a characteristic of manual route summarization?
- Arequires high bandwidth utilization for the routing updates
- Bhas to be configured globally on the router
- Creduces total number of routes in routing tables
- Dcannot include supernet routes
54
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? (Choose two.)
- Agig 0/0 of R3
- Bserial 0/1/0 of R4
- Cserial 0/1/0 of R2
- Dserial 0/0/1 of R2
- Eserial 0/0/1 of R3
55Refer 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? (Choose two.)
- A172.16.3.0/24
- B172.16.0.0/16
- C192.168.10.0/24
- D192.168.10.0/30
- E192.168.1.0/30
56Refer to the exhibit. Router CiscoVille has been partially configured for EIGRP authentication. What is missing that would allow successful authentication between EIGRP neighbors?
- AThe CiscoVille router requires a second keychain to function correctly when using two interfaces for EIGRP authentication.
- BThe keychain for EIGRP authentication must be configured on the interfaces.
- CA username and password must be configured.
- DThe interfaces that will use EIGRP authentication must be specified.
57Beginning with the Cisco IOS Software Release 15.0, which license is a prerequisite for installing additional technology pack licenses?
- AUC
- BIPBase
- CSEC
- DDATA
58What statement describes a Cisco IOS image with the “universalk9_npe” designation for Cisco ISR G2 routers?
- AIt is an IOS version that, at the request of some countries, removes any strong cryptographic functionality.
- BIt is an IOS version that provides only the IPBase feature set.
- CIt is an IOS version that offers all of the Cisco IOS Software feature sets.
- DIt is an IOS version that can only be used in the United States of America.
59Which command is used to configure a one-time acceptance of the EULA for all Cisco IOS software packages and features?
- Alicense save
- Blicense accept end user agreement
- Cshow license
- Dlicense boot module module-name
60How long is the evaluation license period for Cisco IOS Release 15.0 software packages?
- A30 days
- B15 days
- C60 days
- D180 days
61Which IOS 12.4 software package integrates full features, including voice, security, and VPN capabilities, for all routing protocols?
- AService Provider Services
- BAdvanced Enterprise Services
- CAdvanced Security
- DAdvanced IP Services
62When 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?
- AProduct Activation Key
- BUnique Device Identifier
- CSoftware Claim Certificate
- DEnd User License Agreement
63The customer of a networking company requires VPN connectivity for workers who must travel frequently. To support the VPN server, the customer router must be upgraded to a new Cisco IOS software version with the Advanced IP Services feature set. What should the field engineer do before copying the new IOS to the router?
- AIssue the show version and the show flash commands to ensure that the router has enough memory and file space to support the new IOS image.
- BSet the router to load the new IOS image file directly from the TFTP server on the next reboot.
- CDelete the currently installed IOS by using the erase flash: command, and reload the router
- DIssue the show running-configuration command to determine the features of the currently installed IOS image file.
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- CCNA Practice Quiz
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