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CCNA 3 Practice Quiz

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CCNA Practice Quiz
th1rt33n_tony
Quiz by th1rt33n_tony, updated more than 1 year ago
th1rt33n_tony
Created by th1rt33n_tony over 8 years ago
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3
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Resource summary

Question 1

Question
Which technology is required when switched networks are designed to include redundant links?
Answer
  • Spanning Tree Protocol
  • virtual LANs
  • link aggregation
  • virtual private networks

Question 2

Question
Which 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?
Answer
  • STP
  • Rapid PVST+
  • PVST+
  • MST

Question 3

Question
Which statement describes a characteristic of Cisco Meraki switches?
Answer
  • They are service provider switches that aggregate traffic at the edge of the network.
  • They are cloud-managed access switches that enable virtual stacking of switches.
  • They are campus LAN switches that perform the same functions as Cisco 2960 switches.
  • They promote infrastructure scalability, operational continuity, and transport flexibility.

Question 4

Question
If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?
Answer
  • highest IP address
  • lowest MAC address
  • lowest IP address
  • highest MAC address

Question 5

Question
What is a characteristic of a Layer 2 loop?
Answer
  • A switch is continually forwarding the same unicast frame.
  • Broadcast frames are forwarded back to the sending switch.
  • Routers continually forward packets to other routers.
  • The Time-to-Live attribute of a frame is set to infinity.

Question 6

Question
Which two network design features require Spanning Tree Protocol (STP) to ensure correct network operation? (Choose two.)
Answer
  • redundant links between Layer 2 switches
  • removing single points of failure with multiple Layer 2 switches
  • link-state dynamic routing that provides redundant routes
  • static default routes
  • implementing VLANs to contain broadcasts

Question 7

Question
In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose two.)
Answer
  • listening
  • learning
  • forwarding
  • disabled
  • blocking

Question 8

Question
Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?
Answer
  • root port
  • disabled port
  • alternate
  • designated port

Question 9

Question
What is an advantage of using LACP?
Answer
  • decreases the chance of a spanning-tree loop
  • provides a simulated environment for testing link aggregation
  • allows automatic formation of EtherChannel links
  • decreases the amount of configuration that is needed on a switch for EtherChannel
  • increases redundancy to Layer 3 devices

Question 10

Question
Which command will initiate EtherChannel interface configuration mode?
Answer
  • interface port-channel interface-identifier
  • interface interface-identifier
  • interface range interface-identifier
  • channel-group group-identifier

Question 11

Question
Which PAgP mode combination will establish an EtherChannel?
Answer
  • switch 1 set to desirable; switch 2 set to desirable.
  • switch 1 set to on; switch 2 set to desirable.
  • switch 1 set to auto; switch 2 set to auto.
  • switch 1 set to auto; switch 2 set to on.

Question 12

Question
When 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?
Answer
  • active
  • desirable
  • auto
  • passive

Question 13

Question
When a range of ports is being configured for EtherChannel, which mode will configure LACP so that it initiates the EtherChannel negotiation?
Answer
  • desirable
  • auto
  • active
  • passive

Question 14

Question
What type of wireless antenna is best suited for providing coverage in large open spaces, such as hallways or large conference rooms?
Answer
  • Yagi
  • omnidirectional
  • directional
  • dish

Question 15

Question
During which stage of establishing connectivity between a WLAN client and an AP does the client learn the MAC address of the AP?
Answer
  • encryption
  • authentication
  • discovery
  • association
  • probing

Question 16

Question
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?
Answer
  • Issue the clear ip ospf process privileged mode command.
  • Configure the network statements.
  • Change the OSPFv2 process ID.
  • Change the interface priority.

Question 17

Question
Refer to the exhibit. What three conclusions can be drawn from the displayed output? (Choose three.)
Image:
7fc43971-d4b0-4c2c-b8cb-3b8db9081d3e (image/png)
Answer
  • 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 on the DR router is 3.3.3.3
  • The BDR has three neighbors.
  • The router ID values were not the criteria used to select the DR and the BDR.
  • This interface is using the default priority.

Question 18

Question
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?
Answer
  • show ipv6 ospf interface serial 0/0/0
  • show ip ospf neighbor
  • show ip ospf interface serial 0/0/0
  • show ip ospf interface fastethernet 0/1

Question 19

Question
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?
Image:
58275af7-2c26-4c2f-9037-8d880ea2ec86 (image/png)
Answer
  • The R1 dead timer expires between hello packets from R2.
  • The neighbor adjacency has formed.
  • R1 automatically adjusts its own timers to match the R2 timers.
  • The hello timer on R2 expires every ten seconds.

Question 20

Question
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? (Choose two.)
Answer
  • show running-configuration
  • show ip ospf neighbor
  • show ip ospf interface
  • show ip route ospf
  • show ip protocols

Question 21

Question
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?
Answer
  • A clock rate has not been set on the DCE interface of the serial link.
  • The OSPFv2 process IDs on each router do not match.
  • A DR election has not taken place.
  • The subnet masks on the two connected serial interfaces do not match.

Question 22

Question
A network engineer is troubleshooting OSPFv2 routing issues on two connected routers. Which two requirements to form an adjacency need to be verified? (Choose two.)
Answer
  • Verify that the interfaces that connect the two routers are in the same area.
  • Verify that one of the routers is the DR or BDR and the other router a DRother.
  • Verify that one of the interfaces that connects the two routers is active and the other passive.
  • Verify that the interfaces that connect the two routers are in the same subnet.
  • Verify that both routers are using the same OSPFv2 process ID.

Question 23

Question
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?
Answer
  • show ip protocols
  • show ip ospf interface
  • show ip interface brief
  • show ip route ospf

Question 24

Question
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?
Image:
cedd3a93-bdb4-4df0-85a2-630318d3d150 (image/png)
Answer
  • The routers are using IPv6 link local addresses to communicate.
  • The network type has been set to BROADCAST instead of NBMA.
  • The routers are using IPv4 addresses for router IDs.
  • All of the routers have an OSPFv3 interface priority of 0.

Question 25

Question
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?
Image:
1bc94926-744d-48b3-bdb2-10500cf2ab1a (image/png)
Answer
  • The routers do not have global IPv6 addresses that are configured on the Fa0/0 interfaces.
  • The routers have both been elected as the DR.
  • The routers are configured with the same router ID.
  • The routers have the same priority.

Question 26

Question
What is a recommended method of authentication for OSPFv3?
Answer
  • MD5 authentication
  • IPsec to secure routing updates
  • the passive-interface command
  • a VPN tunnel between each OSPF neighbor adjacency

Question 27

Question
During verification or troubleshooting of the OPSFv3 configuration on a router, which three parameters are displayed by the show ipv6 ospf interface command? (Choose three.)
Answer
  • the hello and dead intervals
  • the metric of the route that is attached to the interface
  • the global unicast IPv6 address of the interface
  • the number of interfaces in the area
  • the OSPFv3 area that the interface is in
  • the process ID that is assigned to the interface

Question 28

Question
Refer to the exhibit. What can be concluded about network 192.168.4.0 in the R2 routing table?
Image:
efa32aff-667f-428a-bc74-a383816557f8 (image/png)
Answer
  • This network should be used to forward traffic toward external networks.
  • The network was learned from a router within the same area as R2.
  • The network was learned through summary LSAs from an ABR.
  • The network can be reached through the GigabitEthernet0/0 interface.

Question 29

Question
Refer to the exhibit. What is indicated by the O IA in the router output?
Image:
1294ed9e-83a2-419a-be6e-2026bc87371d (image/png)
Answer
  • The route was learned from within the area.
  • The route was learned from outside the internetwork.
  • The route was manually configured.
  • The route was learned from another area.

Question 30

Question
Which statement describes a multiarea OSPF network?
Answer
  • It has a core backbone area with other areas connected to the backbone area.
  • It has multiple routers that run multiple routing protocols simultaneously, and each protocol consists of an area.
  • It consists of multiple network areas that are daisy-chained together.
  • It requires a three-layer hierarchical network design approach.

Question 31

Question
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?
Answer
  • r1(config-router)# network 192.168.0.0 0.0.0.255 area 1
  • r1(config-router)# network 192.168.4.0 0.0.255.255 area 0
  • r1(config-router)# network 192.168.4.0 0.0.15.255 area 1
  • r1(config-router)# network 192.168.0.0 0.0.3.255 area 0
  • r1(config-router)# network 192.168.4.0 0.0.3.255 area 0
  • r1(config-router)# network 192.168.4.0 0.0.3.255 area 1

Question 32

Question
Which two networks are part of the summary route 192.168.32.0/22? (Choose two.)
Answer
  • 192.168.35.0/24
  • 192.168.36.0/24
  • 192.168.33.0/24
  • 192.168.31.0/24
  • 192.168.37.0/24
  • 192.168.38.0/24

Question 33

Question
What routing table descriptor is used to identify OSPF summary networks that originate from an ABR?
Answer
  • O E1
  • O E2
  • O
  • O IA

Question 34

Question
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? (Choose two.)
Answer
  • bandwidth
  • MTU
  • delay
  • load
  • reliability

Question 35

Question
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?
Answer
  • 10 seconds
  • 15 seconds
  • 20 seconds
  • 30 seconds

Question 36

Question
Which EIGRP route would have the preferred administrative distance?
Answer
  • a summary route
  • an internal route
  • an external route that is redistributed from RIP
  • an external route that is redistributed from OSPF

Question 37

Question
When an EIGRP-enabled router uses a password to accept routes from other EIGRP-enabled routers, which mechanism is used?
Answer
  • EIGRP authentication
  • Diffusing Update Algorithm
  • Reliable Transport Protocol
  • bounded updates
  • partial updates

Question 38

Question
Where are EIGRP successor routes stored?
Answer
  • only in the routing table
  • in the routing table and the topology table
  • only in the neighbor table
  • in the routing table and the neighbor table

Question 39

Question
Which command is used to display the bandwidth of an interface on an EIGRP-enabled router?
Answer
  • show ip protocols
  • show interfaces
  • show ip interface brief
  • show ip route

Question 40

Question
What information does EIGRP maintain within the routing table?
Answer
  • only feasible successors
  • adjacent neighbors
  • only successors
  • all routes known to the router
  • both successors and feasible successors

Question 41

Question
Which command can be issued on a router to verify that automatic summarization is enabled?
Answer
  • show ip eigrp neighbors
  • show ip protocols
  • show ip interface brief
  • show ip eigrp interfaces

Question 42

Question
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?
Image:
98cfadd1-8a06-4946-8949-15f284fc7e5a (image/png)
Answer
  • Automatic summarization has been enabled only for the 172.21.100.0/24 network.
  • Automatic summarization is enabled on neighboring routers.
  • Automatic summarization is disabled on a per-interface basis.
  • Automatic summarization is disabled on R3.

Question 43

Question
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?
Image:
13cb661d-bf91-438c-a9f1-3bd0afdc413e (image/png)
Answer
  • because the automatic summarization is enabled on R1
  • because the IPv4 address on Fa0/0 interface of R1 is incorrect
  • because the Fa0/0 interface of R1 is declared as passive for EIGRP
  • because there is no network command for the network 192.168.1.0/24 on R1

Question 44

Question
In which IOS CLI mode must a network administrator issue the maximum-paths command to configure load balancing in EIGRP?
Answer
  • router configuration mode
  • interface configuration mode
  • global configuration mode
  • privileged mode

Question 45

Question
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?
Answer
  • a process ID mismatch
  • an authentication mismatch
  • an access list that is blocking advertisements from other networks
  • automatic summarization that is disabled on both routers

Question 46

Question
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?
Image:
df45cb1d-5fc0-4ab3-8994-bcd2bce5d1d0 (image/png)
Answer
  • The GigabitEthernet 0/1 interface is not participating in the EIGRP process.
  • The hello timer has been modified on interface GigabitEthernet 0/1 of R3 and not on the neighbor, causing a neighbor adjacency not to form.
  • The passive-interface command is preventing neighbor relationships on interface GigabitEthernet 0/0.
  • The GigabitEthernet interfaces are not limiting the flow of EIGRP message information and are being flooded with EIGRP traffic.

Question 47

Question
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?
Image:
7c9a2c28-6ec5-47c0-bf20-b47e31bd3d21 (image/png)
Answer
  • Configure the same hello interval between the routers.
  • Configure EIGRP to send periodic updates.
  • Enable the serial interfaces of both routers.
  • Configure both routers with the same EIGRP process ID.

Question 48

Question
Refer to the exhibit. Which statement is supported by the output?
Image:
46f42509-4128-49b2-b00c-b593726dd3b7 (image/png)
Answer
  • The route to 192.168.1.1 represents the configuration of a loopback interface.
  • A static default route has been manually configured on this router.
  • A default route is being learned through an external process.
  • Summarization of routes has been manually configured.

Question 49

Question
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?
Image:
325d682a-8818-4cd8-b944-aa01cdafd5f5 (image/png)
Answer
  • The same autonomous system numbers must be used in the interface configurations of each router.
  • The key string should be used in interface mode instead of the key chain.
  • The same number of key strings must be used on each router.
  • The same key chain name must be used on each router.
  • The authentication configuration is correct, issue the show ip eigrp neighbors command to troubleshoot the issue.

Question 50

Question
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?
Answer
  • ip bandwidth-percent eigrp 100 48
  • ip bandwidth-percent eigrp 100 75
  • ip bandwidth-percent eigrp 75 100
  • ip bandwidth-percent eigrp 64 48
  • ip bandwidth-percent eigrp 100 64

Question 51

Question
Which three statements are advantages of using automatic summarization? (Choose three.)
Answer
  • 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.
  • It maximizes the number of routes in the routing table.
  • It improves reachability in discontiguous networks.
  • It increases the size of routing updates.

Question 52

Question
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?
Image:
1d10743a-f888-4ae6-b771-8b621353f952 (image/png)
Answer
  • The passive-interface command should have been issued on serial 0/1/0.
  • The IPv4 address configured on the neighbor that is connected to R1 serial 0/1/0 is incorrect.
  • The hello interval has been altered on serial 0/1/0 and is preventing a neighbor relationship from forming.
  • The network statement used for EIGRP 55 does not enable EIGRP on interface serial 0/1/0.
  • The networks that are configured on serial 0/0/0 and serial 0/1/0 of router R1 are overlapping.

Question 53

Question
What is a characteristic of manual route summarization?
Answer
  • requires high bandwidth utilization for the routing updates
  • has to be configured globally on the router
  • reduces total number of routes in routing tables
  • cannot include supernet routes

Question 54

Question
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.)
Image:
3b91651c-803c-45de-9488-b67f3e86cb92 (image/png)
Answer
  • gig 0/0 of R3
  • serial 0/1/0 of R4
  • serial 0/1/0 of R2
  • serial 0/0/1 of R2
  • serial 0/0/1 of R3

Question 55

Question
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? (Choose two.)
Image:
1d08a525-8539-4328-8497-707e07eb071b (image/png)
Answer
  • 172.16.3.0/24
  • 172.16.0.0/16
  • 192.168.10.0/24
  • 192.168.10.0/30
  • 192.168.1.0/30

Question 56

Question
Refer to the exhibit. Router CiscoVille has been partially configured for EIGRP authentication. What is missing that would allow successful authentication between EIGRP neighbors?
Image:
9b97e439-002d-4754-8f21-31f16203eb1b (image/png)
Answer
  • The CiscoVille router requires a second keychain to function correctly when using two interfaces for EIGRP authentication.
  • The keychain for EIGRP authentication must be configured on the interfaces.
  • A username and password must be configured.
  • The interfaces that will use EIGRP authentication must be specified.

Question 57

Question
Beginning with the Cisco IOS Software Release 15.0, which license is a prerequisite for installing additional technology pack licenses?
Answer
  • UC
  • IPBase
  • SEC
  • DATA

Question 58

Question
What statement describes a Cisco IOS image with the “universalk9_npe” designation for Cisco ISR G2 routers?
Answer
  • It is an IOS version that, at the request of some countries, removes any strong cryptographic functionality.
  • It is an IOS version that provides only the IPBase feature set.
  • It is an IOS version that offers all of the Cisco IOS Software feature sets.
  • It is an IOS version that can only be used in the United States of America.

Question 59

Question
Which command is used to configure a one-time acceptance of the EULA for all Cisco IOS software packages and features?
Answer
  • license save
  • license accept end user agreement
  • show license
  • license boot module module-name

Question 60

Question
How long is the evaluation license period for Cisco IOS Release 15.0 software packages?
Answer
  • 30 days
  • 15 days
  • 60 days
  • 180 days

Question 61

Question
Which IOS 12.4 software package integrates full features, including voice, security, and VPN capabilities, for all routing protocols?
Answer
  • Service Provider Services
  • Advanced Enterprise Services
  • Advanced Security
  • Advanced IP Services

Question 62

Question
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?
Answer
  • Product Activation Key
  • Unique Device Identifier
  • Software Claim Certificate
  • End User License Agreement

Question 63

Question
The 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?
Answer
  • Issue 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.
  • Set the router to load the new IOS image file directly from the TFTP server on the next reboot.
  • Delete the currently installed IOS by using the erase flash: command, and reload the router
  • Issue the show running-configuration command to determine the features of the currently installed IOS image file.
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