CCNA 3 Exam
.
- 1.
A network designer is considering whether toimplement a switch block on the company network.What is the primary advantage of deploying a switchblock?
- A.
A single core router provides all the routing between VLANs.
- B.
The failure of a switch block will not impact all end users.
- C.
This is a security feature that is available on all new Catalyst switches.
- D.
This is network application software that prevents the failure of a single network device.
Correct Answer
B. The failure of a switch block will not impact all end users. -
- 2.
Which characteristic would most influence a networkdesign engineer to select a multilayer switch over aLayer 2 switch
- A.
Ability to build a routing table
- B.
Ability to aggregate multiple ports for maximum data throughput
- C.
Ability to provide power to directly-attached devices and the switch itself
- D.
Ability to have multiple forwarding paths through the switched network based on VLAN number(s)
Correct Answer
A. Ability to build a routing table -
- 3.
What are three access layer switch features that areconsidered when designing a network? (Choose three.)
- A.
Broadcast traffic containment
- B.
Failover capability
- C.
Forwarding rate
- D.
Port density
- E.
Power over Ethernet
- F.
Speed of convergence
Correct Answer(s)
C. Forwarding rate
D. Port density
E. Power over Ethernet -
- 4.
In a large enterprise network, which two functions areperformed by routers at the distribution layer? (Choosetwo.)
- A.
Connect remote networks
- B.
Provide Power over Ethernet to devices
- C.
Connect users to the network
- D.
Provide data traffic security
- E.
Provide a high-speed network backbone
Correct Answer(s)
A. Connect remote networks
D. Provide data traffic security -
- 5.
A set of switches is being connected in a LAN topology.Which STP bridge priority value will make it least likelyfor the switch to be selected as the root?
- A.
4096
- B.
32768
- C.
61440
- D.
65535
Correct Answer
C. 61440 -
- 6.
Refer to the exhibit. Which switch will be the root bridgeafter the election process is complete?
- A.
S1
- B.
S2
- C.
S3
- D.
S4
Correct Answer
B. S2 -
- 7.
Refer to the exhibit. What are the possible port roles forports A, B, C, and D in this RSTP-enabled network?
- A.
Alternate, root, designated, root
- B.
Designated, root, alternate, root
- C.
Alternate, designated, root, root
- D.
Designated, alternate, root, root
Correct Answer
C. Alternate, designated, root, root -
- 8.
A network administrator enters the spanning-treeportfast bpduguard default command. What is theresult of this command being issued on a Cisco switch?
- A.
Any switch port will be error-disabled if it receives a BPDU.
- B.
Any trunk ports will be allowed to connect to the network immediately, rather than waiting to converge.
- C.
Any switch port that has been configured with PortFast will be error-disabled if it receives a BPDU.
- D.
Any switch port that receives a BPDU will ignore the BPDU message.
Correct Answer
C. Any switch port that has been configured with PortFast will be error-disabled if it receives a BPDU. -
- 9.
Refer to the exhibit. A network administrator is configuring PVST+ for the three switches. What will be aresult of entering these commands?
- A.
S1 will set the priority value for VLAN 10 to 0.
- B.
S2 will set the priority value for VLAN 10 to 24576.
- C.
S3 will set the priority value for VLAN 30 to 8192.
- D.
S1 will set the priority value for VLAN 20 to 24596.
Correct Answer
C. S3 will set the priority value for VLAN 30 to 8192. -
- 10.
Refer to the exhibit. Which destination MAC address isused when frames are sent from the workstation to thedefault gateway?
- A.
MAC address of the forwarding router
- B.
MAC addresses of both the forwarding and standby routers
- C.
MAC address of the standby router
- D.
MAC address of the virtual router
Correct Answer
D. MAC address of the virtual router -
- 11.
A network administrator is analyzing the features thatare supported by diffrent hop router redundancyprotocols. Which statement is a feature that isassociated with GLBP?
- A.
GLBP allows load balancing between routers.
- B.
It is nonproprietary.
- C.
It uses a virtual router master.
- D.
It works together with VRRP.
Correct Answer
A. GLBP allows load balancing between routers. -
- 12.
A network administrator is analyzing the features that are supported by diffrent first-hop router redundancyprotocols. Which statement describes a feature that isassociated with HSRP?
- A.
HSRP uses active and standby routers.
- B.
It uses ICMP messages in order to assign the default gateway to hosts
- C.
It allows load balancing between a group of redundant routers.
- D.
HSRP is nonproprietary.
Correct Answer
A. HSRP uses active and standby routers. -
- 13.
Which function is provided by EtherChannel?
- A.
Spreading traffic across multiple physical WAN links
- B.
Dividing the bandwidth of a single link into separate time slots
- C.
Enabling traffic from multiple VLANs to travel over a single Layer 2 link
- D.
Creating one logical link by using multiple physical links between two LAN switches
Correct Answer
D. Creating one logical link by using multiple physical links between two LAN switches -
- 14.
Which mode configuration setting would allowformation of an EtherChannel link between switchesSW1 and SW2 without sending negotiation traffic?
- A.
SW1: on SW2: on
- B.
SW1: desirable SW2: desirable
- C.
SW1: auto SW2: auto trunking enabled on both switches
- D.
SW1: auto SW2: auto PortFast enabled on both switches
- E.
SW1: passive SW2: active
Correct Answer
A. SW1: on SW2: on -
- 15.
Which two channel group modes would place aninterface in a negotiating state using PAgP? (Choose two)
- A.
On
- B.
Desirable
- C.
Active
- D.
Auto
- E.
Passive
Correct Answer(s)
A. On
D. Auto -
- 16.
- What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.)
- A.
The interfaces that are involved need to be contiguous on the switch.
- B.
All the interfaces need to work at the same speed.
- C.
All the interfaces need to be working in the same duplex mode.
- D.
All interfaces need to be assigned to di푣erent VLANs.
Correct Answer(s)
B. All the interfaces need to work at the same speed.
C. All the interfaces need to be working in the same duplex mode. - 17.
Refer to the exhibit. Which two conclusions can bedrawn from the output? (Choose two.)
- A.
The EtherChannel is down.
- B.
The port channel ID is 2.
- C.
The port channel is a Layer 3 channel.
- D.
The bundle is fully operational.
- E.
The load-balancing method used is source port to destination port.
Correct Answer(s)
A. The EtherChannel is down.
B. The port channel ID is 2. -
- 18.
What two conditions have to be met in order to form acluster that includes 5 access points? (Choose two.)
- A.
Clustering mode must be enabled on the APs.
- B.
At least two controllers are needed to form the cluster.
- C.
The APs have to be connected on the same network segment.
- D.
The APs must all be configured to use different radio modes.
- E.
The APs must use different cluster names.
Correct Answer(s)
A. Clustering mode must be enabled on the APs.
C. The APs have to be connected on the same network segment. -
- 19.
A remote classroom can successfully access videointensivestreaming lectures via wired computers.However, when an 802.11n wireless access point isinstalled and used with 25 wireless laptops to access thesame lectures, poor audio and video quality isexperienced. Which wireless solution would improve theperformance for the laptops?
- A.
Decrease the power of the wireless transmitter.
- B.
Add another access point.
- C.
Upgrade the access point to one that can route.
- D.
Adjust the wireless NICs in the laptops to operate at 10GHz to be compatible with 802.11n.
Correct Answer
B. Add another access point. -
- 20.
Which wireless network topology is being con鹃닻gured bya technician who is installing a keyboard, a mouse, andheadphones, each of which uses Bluetooth?
- A.
Ad hoc mode
- B.
Hotspot
- C.
Infrastructure mode
- D.
Mixed mode
Correct Answer
A. Ad hoc mode -
- 21.
What are the two methods that are used by a wirelessNIC to discover an AP? (Choose two.)
- A.
Sending an ARP request
- B.
Delivering a broadcast frame
- C.
Transmitting a probe request
- D.
Initiating a three-way handshake
- E.
Receiving a broadcast beacon frame
Correct Answer(s)
C. Transmitting a probe request
E. Receiving a broadcast beacon frame -
- 22.
At a local college, students are allowed to connect tothe wireless network without using a password. Whichmode is the access point using?
- A.
Network
- B.
Open
- C.
Passive
- D.
Shared-key
Correct Answer
B. Open -
- 23.
Which wireless encryption method is the most secure?
- A.
WPA
- B.
WEP
- C.
WPA2 with TKIP
- D.
WPA2 with AES
Correct Answer
D. WPA2 with AES -
- 24.
Users on an IEEE 801.11n network are complaining ofslow speeds. The network administrator checks the APand verfies it is operating properly. What can be doneto improve the wireless performance in the network?
- A.
Split the wireless traffic between the 802.11n 2.4 GHz band and the 5 GHz band.
- B.
Change the authentication method on the AP.
- C.
Switch to an 802.11g AP.
- D.
Set the AP to mixed mode.
Correct Answer
A. Split the wireless traffic between the 802.11n 2.4 GHz band and the 5 GHz band. -
- 25.
A network engineer is implementing security on allcompany routers. Which two commands must be issuedto force authentication via the password 1C34dE for allOSPF-enabled interfaces in the backbone area of thecompany network? (Choose two.)
- A.
Ip ospf message-digest-key 1 md5 1C34dE
- B.
Area 1 authentication message-digest
- C.
Username OSPF password 1C34dE
- D.
Enable password 1C34dE
- E.
Area 0 authentication message-digest
Correct Answer(s)
A. Ip ospf message-digest-key 1 md5 1C34dE
E. Area 0 authentication message-digest -
- 26.
Refer to the exhibit. When the show ip ospf neighborcommand is given from the R1# prompt, no output isshown. However, when the show ip interface briefcommand is given, all interfaces are showing up and up.What is the most likely problem?
- A.
R1 or R2 does not have a loopback interface that is configured yet.
- B.
The ISP has not configured a static route for the ABC Company yet.
- C.
R1 or R2 does not have a network statement for the 172.16.100.0 network.
- D.
R1 has not sent a default route down to R2 by using the default-information originate command.
Correct Answer
C. R1 or R2 does not have a network statement for the 172.16.100.0 network. -
- 27.
What are two methods to make the OSPF routingprotocol more secure? (Choose two.)
- A.
Use only OSPFv3.
- B.
Use MD5 authentication.
- C.
Use the enable secret command.
- D.
When feasible, create a VPN tunnel between each OSPF neighbor adjacency.
- E.
Use the passive-interface command on LAN interfaces that are connected only to end-user devices.
Correct Answer(s)
B. Use MD5 authentication.
E. Use the passive-interface command on LAN interfaces that are connected only to end-user devices. -
- 28.
- A network engineer is troubleshooting a single-area OSPFv3 implementation across routers R1, R2, and R3. During the veri cation of the implementation, it is noted that the routing tables on R1 and R2 do not include the entry for a remote LAN on R3. Examination of R3 shows the following: 1.that all interfaces have correct addressing 2.that the routing process has been globally con gured 3.that correct router adjacencies have formed What additional action taken on R3 could solve the problem?
- A.
Use the network command to configure the LAN network under the global routing process.
- B.
Enable the OSPFv3 routing process on the interface connected to the remote LAN.
- C.
Force DR/BDR elections to occur where required.
- D.
Restart the OPSFv3 routing process.
Correct Answer
B. Enable the OSPFv3 routing process on the interface connected to the remote LAN. - 29.
Refer to the exhibit. A network technician istroubleshooting missing OSPFv3 routes on a router.What is the cause of the problem based on thecommand output?
- A.
The local router has formed complete neighbor adjacencies, but must be in a 2WAY state for the router databases to be fully synchronized.
- B.
There is a problem with the OSPFv3 adjacency between the local router and the router that is using the neighbor ID 2.2.2.2.
- C.
The dead time must be higher than 30 for all routers to form neighbor adjacencies.
- D.
The neighbor IDs are incorrect. The interfaces must use only IPv6 addresses to ensure fully synchronized routing databases.
Correct Answer
B. There is a problem with the OSPFv3 adjacency between the local router and the router that is using the neighbor ID 2.2.2.2. -
- 30.
When does an OSPF router become an ABR?
- A.
When the router has interfaces in diffrent areas
- B.
When the router is configured as an ABR by the network administrator
- C.
When the router has the highest router ID
- D.
When the router has an OSPF priority of 0
Correct Answer
A. When the router has interfaces in diffrent areas -
- 31.
Which type of OSPF LSA represents an external routeand is propagated across the entire OSPF domain?
- A.
Type 1
- B.
Type 2
- C.
Type 3
- D.
Type 4
- E.
Type 5
Correct Answer
E. Type 5 -
- 32.
Refer to the exhibit. What can be concluded aboutnetwork 192.168.1.0 in the R2 routing table?
- A.
This network has been learned from an internal router within the same area.
- B.
This network was learned through summary LSAs from an ABR.
- C.
This network is directly connected to the interface GigabitEthernet0/0.
- D.
This network should be used to forward traffic toward external networks.
Correct Answer
B. This network was learned through summary LSAs from an ABR. -
- 33.
What are two features of OSPF interarea routesummarization? (Choose two.)
- A.
ASBRs perform all OSPF summarization.
- B.
Routes within an area are summarized by the ABR.
- C.
ABRs advertise the summarized routes into the backbone.
- D.
Type 3 and type 5 LSAs are used to propagate summarized routes by default.
- E.
Route summarization results in high network traffic and router overhead.
Correct Answer(s)
B. Routes within an area are summarized by the ABR.
C. ABRs advertise the summarized routes into the backbone. -
- 34.
Refer to the exhibit. A company has migrated fromsingle area OSPF to multiarea. However, none of the users from network 192.168.1.0/24 in the new area canbe reached by anyone in the Branch1 offce. From theoutput in the exhibit, what is the problem?
- A.
There are no interarea routes in the routing table for network 192.168.1.0.
- B.
The OSPF routing process is inactive.
- C.
The link to the new area is down.
- D.
The router has not established any adjacencies with other OSPF routers.
Correct Answer
A. There are no interarea routes in the routing table for network 192.168.1.0. -
- 35.
When are EIGRP update packets sent?only when necessary
- A.
When learned routes age out
- B.
Only when necessary
- C.
Every 5 seconds via multicast
- D.
Every 30 seconds via broadcast
Correct Answer
B. Only when necessary -
- 36.
Which two statements are correct about EIGRPacknowledgment packets? (Choose two.)
- A.
The packets are sent in response to hello packets.
- B.
The packets are used to discover neighbors that are connected on an interface.
- C.
The packets are sent as unicast.
- D.
The packets require confirmation.
- E.
The packets are unreliable.
Correct Answer(s)
B. The packets are used to discover neighbors that are connected on an interface.
E. The packets are unreliable. -
- 37.
Refer to the exhibit. If router B is to be configured forEIGRP AS 100, which configuration must be entered?
- A.
B(config-router)# network 192.168.10.4 0.0.0.3 B(config--router)# network 192.168.10.8 0.0.0.3
- B.
B(config-router)# network 192.168.10.4 0.0.0.3 B(config--router)# network 192.168.10.8 0.0.0.3 B(config--router)#network 192.168.10.128 0.0.0.63
- C.
B(config--router)# network 192.168.10.4 255.255.255.248 B(config--router)# network 192.168.10.8 255.255.255.248 B(config--router)#network 192.168.10.128 255.255.255.192
- D.
B(config--router)# network 192.168.10.0 255.255.255.0 B(config--router)# network 192.168.10.4 0.0.0.3 B(con鹃닻g-router)# network 192.168.10.8 0.0.0.3 B(config--router)# network 192.168.10.64 0.0.0.63 B(config--router)# network 192.168.10.128 0.0.0.63 B(config--router)# network 192.168.10.192 0.0.0.63
- E.
B(config--router)# network 192.168.10.0 0.0.0.255
Correct Answer
B. B(config-router)# network 192.168.10.4 0.0.0.3 B(config--router)# network 192.168.10.8 0.0.0.3 B(config--router)#network 192.168.10.128 0.0.0.63 -
- 38.
An administrator issues the router eigrp 100 commandon a router. What is the number 100 used for?
- A.
As the autonomous system number
- B.
As the number of neighbors supported by this router
- C.
As the length of time this router will wait to hear hello packets from a neighbor
- D.
As the maximum bandwidth of the fastest interface on the router
Correct Answer
A. As the autonomous system number -
- 39.
A network administrator wants to verify the defaultdelay values for the interfaces on an EIGRP-enabledrouter. Which command will display these values?
- A.
Show ip protocols
- B.
Show running-config
- C.
Show interfaces
- D.
Show ip route
Correct Answer
C. Show interfaces -
- 40.
Which two parameters does EIGRP use by default tocalculate the best path? (Choose two.)
- A.
Delay
- B.
MTU
- C.
Reliability
- D.
Transmit and receive load
- E.
Bandwidth
Correct Answer(s)
A. Delay
E. Bandwidth -
- 41.
Refer to the exhibit. Which two conclusions can bederived from the output? (Choose two.)
- A.
There is one feasible successor to network 192.168.1.8/30.
- B.
The network 192.168.10.8/30 can be reached through 192.168.11.1.
- C.
The reported distance to network 192.168.1.0/24 is 41024256.
- D.
The neighbor 172.16.6.1 meets the feasibility condition to reach the 192.168.1.0/24 network.
- E.
Router R1 has two successors to the 172.16.3.0/24 network.
Correct Answer(s)
A. There is one feasible successor to network 192.168.1.8/30.
D. The neighbor 172.16.6.1 meets the feasibility condition to reach the 192.168.1.0/24 network. -
- 42.
When will a router that is running EIGRP put adestination network in the active state?
- A.
When the EIGRP domain is converged
- B.
When there is outgoing traffic toward the destination network
- C.
When there is an EIGRP message from the successor of the destination network
- D.
When the connection to the successor of the destination network fails and there is no feasible successor available
Correct Answer
D. When the connection to the successor of the destination network fails and there is no feasible successor available -
- 43.
Which address is used by an IPv6 EIGRP router as thesource for hello messages?
- A.
The 32-bit router ID
- B.
The IPv6 global unicast address that is configured on the interface
- C.
The all-EIGRP-routers multicast address
- D.
The interface IPv6 link-local address
Correct Answer
D. The interface IPv6 link-local address -
- 44.
Refer to the exhibit. A network administrator issues theshow ipv6 eigrp neighbors command. Which conclusioncan be drawn based on the output?
- A.
The link-local addresses of neighbor routers interfaces are configured manually.
- B.
R1 has two neighbors. They connect to R1 through their S0/0/0 and S0/0/1 interfaces.
- C.
The neighbor with the link-local address FE80::5 is the first EIGRP neighbor that is learned by R1.
- D.
If R1 does not receive a hello packet from the neighbor with the link-local address FE80::5 in 2 seconds, it will declare the neighbor router is down.
Correct Answer
B. R1 has two neighbors. They connect to R1 through their S0/0/0 and S0/0/1 interfaces. -
- 45.
Refer to the exhibit. Which route or routes will beadvertised to the router ISP if autosummarization isenabled?
- A.
10.0.0.0/8
- B.
10.1.0.0/16
- C.
10.1.0.0/28
- D.
10.1.1.0/24 10.1.2.0/24 10.1.3.0/24 10.1.4.0/28
Correct Answer
A. 10.0.0.0/8 -
- 46.
By default, how many equal cost routes to the samedestination can be installed in the routing table of aCisco router?
- A.
2
- B.
4
- C.
16
- D.
32
Correct Answer
B. 4 -
- 47.
When a Cisco router is configured with fast-switching,how are packets distributed over equal-cost paths?
- A.
On a per-packet basis
- B.
On a per-interface basis
- C.
On a per-path-load basis
- D.
On a per-destination basis
Correct Answer
D. On a per-destination basis -
- 48.
Refer to the exhibit. Router CiscoVille has been partiallyconfigured for EIGRP authentication. What is missingthat would allow successful authentication betweenEIGRP neighbors?
- A.
The interfaces that will use EIGRP authentication must be specified
- B.
A username and password must be configured
- C.
The keychain for EIGRP authentication must be configured on the interfaces.
- D.
The CiscoVille router requires a second keychain to function correctly when using two interfaces for EIGRP authentication.
Correct Answer
C. The keychain for EIGRP authentication must be configured on the interfaces. -
- 49.
When should EIGRP automatic summarization be turnedoff?
- A.
When a router has not discovered a neighbor within three minutes
- B.
When a router has more than three active interfaces
- C.
When a network contains discontiguous network addresses
- D.
When a router has less than three active interfaces
- E.
When a network addressing scheme uses VLSM
Correct Answer
C. When a network contains discontiguous network addresses -
- 50.
Refer to the exhibit. Routers R1 and R2 are directlyconnected via their serial interfaces and are bothrunning the EIGRP routing protocol. R1 and R2 can pingthe directly connected serial interface of their neighbor,but they cannot form an EIGRP neighbor adjacency.What action should be taken to solve this problem?
- A.
Enable the serial interfaces of both routers.
- B.
Configure EIGRP to send periodic updates.
- C.
Configure the same hello interval between the routers.
- D.
Configure both routers with the same EIGRP process ID.
Correct Answer
D. Configure both routers with the same EIGRP process ID. -
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