Real Cisco CCNA 200-125 Exam Questions and Answers

Real Cisco CCNA 200-125 exam questions and answers have been updated to V21.02, which ensure you pass CCNA Cisco Certified Network Associate CCNA (v3.0) exam successfully. We can know that Cisco 200-125 exam tests a candidate’s knowledge and skills related to:

• Network fundamentals
• LAN switching technologies
• IPv4 and IPv6 routing technologies
• WAN technologies
• Infrastructure services
• Infrastructure security
• Infrastructure management

Real Cisco CCNA 200-125 exam questions and answers will help you test all your knowledge and skills well and ensure your success in 200-125 CCNA Cisco Certified Network Associate CCNA (v3.0) exam.

Cisco 200-125 Free Dumps Online, Read and Test Now

1. Which technology supports the stateless assignment of IPv6 addresses? (Choose two.)

DNS

DHCPv6

DHCP

autoconfiguration

2. After you configure the Loopback0 interface, which command can you enter to verify the status of the interface and determine whether fast switching is enabled?

Router#show ip interface loopback 0

Router#show run

Router#show interface loopback 0

Router#show ip interface brief

3. What are two requirements for an HSRP group? (Choose two.)

exactly one active router

one or more standby routers

one or more backup virtual routers

exactly one standby active router

exactly one backup virtual router

4. Which command sequence can you enter to create VLAN 20 and assign it to an interfaceon a switch?

Switch(config)#vlan 20 Switch(config)#Interface gig x/y Switch(config-if)#switchport access vlan 20

Switch(config)#Interface gig x/y Switch(config-if)#vlan 20 Switch(config-vlan)#switchport access vlan 20

Switch(config)#vlan 20 Switch(config)#Interface vlan 20 Switch(config-if)#switchport trunk native vlan 20

Switch(config)#vlan 20 Switch(config)#Interface vlan 20 Switch(config-if)#switchport access vlan 20

Switch(config)#vlan 20 Switch(config)#Interface vlan 20 Switch(config-if)#switchport trunk allowed vlan 20

5. Which three commands can you use to set a router boot image? (Choose three.)

Router(config)# boot system flash c4500-p-mz.121-20.bin

Router(config)# boot system tftp c7300-js-mz.122-33.SB8a.bin

Router(config)#boot system rom c7301-advipservicesk9-mz.124-24.T4.bin

Router> boot flash:c180x-adventerprisek9-mz-124-6

bin

Router(config)#boot flash:c180x-adventerprisek9-mz-124-6

bin

Router(config)#boot bootldr bootflash:c4500-jk9s-mz.122-23f.bin

6. Which two statements about IPv6 and routing protocols are true? (Choose two.)

EIGRPv3 was developed to support IPv6 routing.

OSPFv3 was developed to support IPv6 routing.

Loopback addresses are used to form routing adjacencies.

EIGRP, OSPF, and BGP are the only routing protocols that support IPv6.

Link-local addresses are used to form routing adjacencies.

7. If primary and secondary root switches with priority 16384 both experience catastrophiclosses, which tertiary switch can take over?

a switch with priority 20480

a switch with priority 8192

a switch with priority 4096

a switch with priority 12288

8. Which two statements about late collisions are true? (Choose two.)

They may indicate a duplex mismatch.

By definition, they occur after the 512th bit of the frame has been transmitted.

They indicate received frames that did not pass the FCS match.

They are frames that exceed 1518 bytes.

They occur when CRC errors and interference occur on the cable.

9. Which command can you enter to set the default route for all traffic to an interface?

router(config)#ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1

router(config)#ip route 0.0.0.0 255.255.255.255 GigabitEthernet0/1

router(config-router)#default-information originate

router(config-router)#default-information originate always

10. Which two spanning-tree port states does RSTP combine to allow faster convergence? (Choose two.)

blocking

listening

learning

forwarding

discarding

11. If a router has four interfaces and each interface is connected to four switches, how many broadcast domains are present on the router?

1

2

4

8

12. Which command enables IPv6 forwarding on a cisco router?

ipv6 host

ipv6 unicast-routing

ipv6 local

ipv6 neighbor

13. Refer to the exhibit.





What is the most appropriate summarization for these routes?

10.0.0.0 /21

10.0.0.0 /22

10.0.0.0 /23

10.0.0.0 /24

14. Which set of commands is recommended to prevent the use of a hub in the access layer?

switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1

switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1

switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1

switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1

15. A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4.

Which route or routes will the router install in the routing table?

the OSPF route

the EIGRP route

the RIPv2 route

all three routes

the OSPF and RIPv2 routes

16. Two routers named Atlanta and Brevard are connected via their serial interfaces as illustrated, but they are unable to communicate. The Atlanta router is known to have the correct configuration.





Given the partial configurations, identify the fault on the Brevard router that is causing the lack of connectivity.

incompatible IP address

insufficient bandwidth

incorrect subnet mask

incompatible encapsulation

link reliability too low

IPCP closed

17. A network administrator needs to configure a serial link between the main office and a remote location. The router at the remote office is a non-cisco router.

How should the network administrator configure the serial interface of the main office router to make the connection?

Main(config)#interface serial 0/0 Main(config-if)#ip address 172.16.1.1 255.255.255.252 Main(config-if)#no shut

Main(config)#interface serial 0/0 Main(config-if)#ip address 172.16.1.1 255.255.255.252 Main(config-if)#encapsulation ietf Main(config-if)#no shut

Main(config)#interface serial 0/0 Main(config-if)#ip address 172.16.1.1 255.255.255.252 Main(config-if)#encapsulation frame-relay Main(config-if)#authenication chap Main(config-if)#no shut

Main(config)#interface serial 0/0 Main(config-if)#ip address 172.16.1.1 255.255.255.252 Main(config-if)#encapsulation ppp Main(config-if)#no shut

18. Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?

Frame Relay

HDLC

x.25

PPP

19. Refer to the exhibit.





The two connected ports on the switch are not turning orange or green.

What would be the most effective steps to troubleshoot this physical layer problem? (Choose three.)

Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.

Ensure that cables A and B are straight-through cables.

Ensure cable A is plugged into a trunk port.

Ensure the switch has power.

Reboot all of the devices.

Reseat all cables.

20. A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2.

Based on the information in the graphic, what is the cause of this problem?

The OSPF area is not configured properly.

The priority on R1 should be set higher.

The cost on R1 should be set higher.

The hello and dead timers are not configured properly.

A backup designated router needs to be added to the network.

The OSPF process ID numbers must match.

21. What will happen if a private IP address is assigned to a public interface connected to an ISP?

Addresses in a private range will be not routed on the Internet backbone.

Only the ISP router will have the capability to access the public network.

The NAT process will be used to translate this address in a valid IP address.

Several automated methods will be necessary on the private network.

A conflict of IP addresses happens, because other public routers can use the same range.

22. Refer to the exhibit.





The Bigtime router is unable to authenticate to the Littletime router.

What is the cause of the problem?

The usernames are incorrectly configured on the two routers.

The passwords do not match on the two routers.

CHAP authentication cannot be used on a serial interface.

The routers cannot be connected from interface S0/0 to interface S0/0.

With CHAP authentication, one router must authenticate to another router. The routers cannot be configured to authenticate to each other.

23. What will be the result if the following configuration commands are implemented on a Cisco switch?

Switch(config-if)# switchport port-securitySwitch(config-if)# switchport port-security mac-address sticky

A dynamically learned MAC address is saved in the startup-configuration file.

A dynamically learned MAC address is saved in the running-configuration file.

A dynamically learned MAC address is saved in the VLAN database.

Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.

Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.

24. Refer to the exhibit.





The following commands are executed on interface fa0/1 of 2950Switch.

2950Switch(config-if)# switchport port-security

2950Switch(config-if)# switchport port-security mac-address sticky

2950Switch(config-if)# switchport port-security maximum 1

The Ethernet frame that is shown arrives on interface fa0/1.

What two functions will occur when this frame

The MAC address table will now have an additional entry of fa0/1 FFF

FFF

FFF

Only host A will be allowed to transmit frames on fa0/1.

This frame will be discarded when it is received by 2950Switch.

All frames arriving on 2950Switch with a destination of 0000.00aa.aaaa will be forwarded out fa0/1.

Hosts B and C may forward frames out fa0/1 but frames arriving from other switches will not be forwarded out fa0/1.

Only frames from source 0000.00bb.bbbb, the first learned MAC address of 2950Switch, will be forwarded out fa0/1.

25. Which command can you enter to re-enable Cisco Discovery Protocol on a local route rafter it has been disabled?

Router(config-if)#cdp run

Router(config-if)#cdp enable

Router(config)#cdp run

Router(config)#cdp enable

26. A cisco router is booting and has just completed the POST process. It is now ready to find and load an IOS image.

What function does the router perform next?

It checks the configuration register

It attempts to boot from a TFTP server

It loads the first image file in flash memory

It inspects the configuration file in NVRAM for boot instructions

27. What are three advantages of VLANs? (Choose three.)

They establish broadcast domains in switched networks.

They utilize packet filtering to enhance network security.

They provide a method of conserving IP addresses in large networks.

They provide a low-latency internetworking alternative to routed networks.

They allow access to network services based on department, not physical location.

They can simplify adding, moving, or changing hosts on the network.

28. Refer to the exhibit.





The output that is shown is generated at a switch.

Which three of these statements are true? (Choose three.)

All ports will be in a state of discarding, learning, or forwarding.

Thirty VLANs have been configured on this switch.

The bridge priority is lower than the default value for spanning tree.

All interfaces that are shown are on shared media.

All designated ports are in a forwarding state.

The switch must be the root bridge for all VLANs on this switch.

29. Which two commands can be used to verify a trunk link configurationt status on a given cisco switch? (choose two)

show interfaces interface

show interfaces trunk

show interfaces switchport

show ip interface brief

show interfaces vlan

30. Which two states are the port states when RSTP has converged? (choose two)

blocking

learning

discarding

forwarding

listening

31. Refer to the exhibit.





A technician has installed SwithchB and needs to configure it for remote access from the management workstation connected SwitchA Which set of commands is required to accomplish this task?

SwitchB(config)#interface FastEthernet 0/1 SwitchB(config)#ip address 192.168.8.252 255.255.255.0 SwitchB(config)#no shutdown

SwitchB(config)#ip default-gateway 192.168.8.254 SwitchB(config)#interface vlan 1 SwitchB(config)#ip address 192.168.8.252 255.255.255.0 SwitchB(config)#no shutdown

SwitchB(config)#interface vlan 1 SwitchB(config)#ip address 192.168.8.252 255.255.255.0 SwitchB(config)#ip default-gateway 192.168.8.254 255.255.255.0 SwitchB(config)#no shutdown

SwitchB(config)#ip default-network 192.168.8.254 SwitchB(config)#interface vlan 1 SwitchB(config)#ip address 192.168.8.252 255.255.255.0 SwitchB(config)#no shutdown

32. Which of the following are benefits of VLANs? (Choose three.)

They increase the size of collision domains.

They allow logical grouping of users by function.

They can enhance network security.

They increase the size of broadcast domains while decreasing the number of collision domains.

They increase the number of broadcast domains while decreasing the size of the broadcast domains.

They simplify switch administration.

33. What are three benefits of implementing vlans? (choose three)

A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure

Broadcast storms can be mitigated by decreasing the number of broadcast domains, thus increasing their size.

A higher level of network security can be reached by separating sensitive data traffic from other network traffic.

Port-based vlans increase switch-port use efficient, thanks to 802.1Q trunks

A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure.

Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size.

VLANs make it easier for IT staff to configure new logical groups, because the vlans all belong to the same broadcast domain.

34. Which three statements accurately describe layer 2 Ethernet switches? (choose three)

Microsegmentation decreases the number of collisions on the network.

if a switch receives a frame for an unkown destination, it uses ARP to resolve the address.

Spanning Tree Protocol allows switches to automatically share vlan information.

In a properly functioning network with redundant switched paths, each switched aegment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will have only one root port.

Establishing vlans increases the number of broadcast domains.

Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.

35. Which two correctly describe steps in the OSI data encapsulation process? (Choose two.)

The transport layer divides a data stream into segments and may add reliability and flow control information.

The data link layer adds physical source and destination addresses and an FCS to the segment.

Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.

Packets are created when the network layer adds Layer 3 addresses and control information to a segment.

The presentation layer translates bits into voltages for transmission across the physical link.

36. Which of the following describes the roles of devices in a WAN? (Choose three.)

A CSU/DSU terminates a digital local loop

A modem terminates a digital local loop

A CSU/DSU terminates an analog local loop

A modem terminates an analog local loop

A router is commonly considered a DTE device

A router is commonly considered a DCE device

37. Which interface counter can you use to diagnose a duplex mismatch problem?

no earner

late collisions

giants

CRC errors

deferred

runts

38. Which feature can you implement to reserve bandwidth for VoIP calls across the call path?

PQ

CBWFQ

round robin

RSVP

39. When an interface is configured with PortFast BPDU guard, how does the interface respond when it receives a BPDU?

It continues operating normally.

It goes into a down/down state.

It becomes the root bridge for the configured VLA

It goes into an errdisable state.

40. What are three characteristics of the TCP protocol? (Choose three.)

It uses a single SYN-ACK message to establish a connection.

The connection is established before data is transmitted.

It ensures that all data is transmitted and received by the remote device.

It supports significantly higher transmission speeds than UD

It requires applications to determine when data packets must be retransmitted.

It uses separate SYN and ACK messages to establish a connection.

41. Which command can you enter to determine whether serial interface 0/2/0 has been configured using HDLC encapsulation?

router#show platform

router#show interfaces Serial 0/2/0

router#show ip interface s0/2/0

router#show ip interface brief

42. Which two statements about IPv4 multicast traffic are true? (Choose two.)

It burdens the source host without affecting remote hosts.

It uses a minimum amount of network bandwidth.

It is bandwidth-intensive.

It simultaneously delivers multiple streams of data.

It is the most efficient way to deliver data to multiple receivers.

43. What are two benefits of private IPv4 IP addresses? (Choose two.)

They are routed the same as public IP addresses.

They are less costly than public IP addresses.

They can be assigned to devices without Internet connections.

They eliminate the necessity for NAT policies.

They eliminate duplicate IP conflicts.

44. What is the authoritative source for an address lookup?

a recursive DNS search

the operating system cache

the ISP local cache

the browser cache

45. Which command can you enter to verify that a BGP connection to a remote device is established?

show ip bgp summary

show ip community-list

show ip bgp paths

show ip route

46. During which phase of PPPoE is PPP authentication performed?

the PPP Session phase

Phase 2

the Active Discovery phase

the Authentication phase

Phase 1

47. Which three circumstances can cause a GRE tunnel to be in an up/down state? (Choose three.)

The tunnel interface IP address is misconfigured.

The tunnel interface is down.

A valid route to the destination address is missing from the routing table.

The tunnel address is routed through the tunnel itself.

The ISP is blocking the traffic.

An ACL is blocking the outbound traffic.

48. Which two statements about using leased lines for your WAN infrastructure are true? (Choose two.)

Leased lines provide inexpensive WAN access.

Leased lines with sufficient bandwidth can avoid latency between endpoints.

Leased lines require little installation and maintenance expertise.

Leased lines provide highly flexible bandwidth scaling.

Multiple leased lines can share a router interface.

Leased lines support up to T1 link speeds.

49. Which two statements about wireless LAN controllers are true? (Choose two.)

They can simplify the management and deployment of wireless LANs.

They rely on external firewalls for WLAN security.

They are best suited to smaller wireless networks.

They must be configured through a GUI over HTTP or HTTP

They can manage mobility policies at a systemwide level.

50. Which two statements about northbound and southbound APIs are true? (Choose two.)

Only southbound APIs allow program control of the network.

Only northbound APIs allow program control of the network.

Only southbound API interfaces use a Service Abstraction Layer.

Only northbound API interfaces use a Service Abstraction Layer.

Both northbound and southbound API interfaces use a Service Abstraction Layer.

Both northbound and southbound APIs allow program control of the network.

51. Which statement about RADIUS security is true?

It supports EAP authentication for connecting to wireless networks.

It provides encrypted multiprotocol support.

Device-administration packets are encrypted in their entirety.

It ensures that user activity is fully anonymous.

52. If you are configuring syslog messages specifying `logging trap warning', which log messages will the router send?

0-4

0-5

0-6

0-2

0-1

53. Which command can you enter to configure an IPV6 floating static route?

Router(config)# ipv6 route FE80:0202::/32 serail 0/1 201

Router(config)# ipv6 route::/0 serail0/1

Router(config)# ipv6 route static resolve default

Router(config)# ipv6 route FE80:0202::/32 serail 0/1 1

54. Which two statements about Ethernet standards are true? (choose two)

Ethernet is defined by IEEE standard 802.2

Ethernet is defined by IEEE standard 802.3

Ethernet 10BASE-T dose not support full-duplex.

When an Ethernet network uses CSMA/CD, it terminates transmission as soon as collision occurs

When an Ethernet network uses CSMA/CA, it terminates transmission as soon as collision occurs

55. Which function does IP SLA ICMP ECHO operation perform to assist with troubleshooting?

packet-loss detection

congestion detection

hop-by-hop response time

one way jitter measurement

56. What are types of IPv6 static routes? (Choose Three.)

Recursive Static routes

Directly connected static routes

Fully specified static routes

Dynamically specified static routes

injected static routes

Redistributed static routes

57. How to configure RIPv2? (Choose Two.)

Enable RIP

Connect RIP to WAN interface

Enable no auto-summary

Enable authentication

58. What is the status of port-channel if LACP is misconfigured?

Forwarding

Enabled

Disabled

errdisabled

59. What is true about DTP? (Choose Three.)

Layer 2 protocol

Layer 3 protocol

Proprietary protocol

enabled by default

disabled by default

60. How to create a trunk port and allow VLAN 20? (Choose Three.)

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk allowed vlan 20

switchport trunk native vlan 20

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