Cisco 200-125 CCNA Cisco Certified Network Associate CCNA (v3.0) Online Training
Cisco 200-125 Online Training
The questions for 200-125 were last updated at Sep 14,2025.
- Exam Code: 200-125
- Exam Name: CCNA Cisco Certified Network Associate CCNA (v3.0)
- Certification Provider: Cisco
- Latest update: Sep 14,2025
What will happen if a private IP address is assigned to a public interface connected to an ISP?
- A . Addresses in a private range will be not routed on the Internet backbone.
- B . Only the ISP router will have the capability to access the public network.
- C . The NAT process will be used to translate this address in a valid IP address.
- D . Several automated methods will be necessary on the private network.
- E . A conflict of IP addresses happens, because other public routers can use the same range.
Refer to the exhibit.
The Bigtime router is unable to authenticate to the Littletime router.
What is the cause of the problem?
- A . The usernames are incorrectly configured on the two routers.
- B . The passwords do not match on the two routers.
- C . CHAP authentication cannot be used on a serial interface.
- D . The routers cannot be connected from interface S0/0 to interface S0/0.
- E . With CHAP authentication, one router must authenticate to another router. The routers cannot be configured to authenticate to each other.
What will be the result if the following configuration commands are implemented on a Cisco switch?
Switch (config-if)# switchport port-security
Switch (config-if)# switchport port-security mac-address sticky
- A . A dynamically learned MAC address is saved in the startup-configuration file.
- B . A dynamically learned MAC address is saved in the running-configuration file.
- C . A dynamically learned MAC address is saved in the VLAN database.
- D . Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.
- E . Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.
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
- A . The MAC address table will now have an additional entry of fa0/1 FFFF.FFFF.FFFF.
- B . Only host A will be allowed to transmit frames on fa0/1.
- C . This frame will be discarded when it is received by 2950Switch.
- D . All frames arriving on 2950Switch with a destination of 0000.00aa.aaaa will be forwarded out fa0/1.
- E . Hosts B and C may forward frames out fa0/1 but frames arriving from other switches will not be forwarded out fa0/1.
- F . Only frames from source 0000.00bb.bbbb, the first learned MAC address of 2950Switch, will be forwarded out fa0/1.
Which command can you enter to re-enable Cisco Discovery Protocol on a local router after it has been disabled?
- A . Router(config-if)#cdp run
- B . Router(config-if)#cdp enable
- C . Router(config)#cdp run
- D . Router(config)#cdp enable
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?
- A . It checks the configuration register
- B . It attempts to boot from a TFTP server
- C . It loads the first image file in flash memory
- D . It inspects the configuration file in NVRAM for boot instructions
What are three advantages of VLANs? (Choose three.)
- A . They establish broadcast domains in switched networks.
- B . They utilize packet filtering to enhance network security.
- C . They provide a method of conserving IP addresses in large networks.
- D . They provide a low-latency internetworking alternative to routed networks.
- E . They allow access to network services based on department, not physical location.
- F . They can simplify adding, moving, or changing hosts on the network.
Refer to the exhibit.
The output that is shown is generated at a switch.
Which three of these statements are true? (Choose three.)
- A . All ports will be in a state of discarding, learning, or forwarding.
- B . Thirty VLANs have been configured on this switch.
- C . The bridge priority is lower than the default value for spanning tree.
- D . All interfaces that are shown are on shared media.
- E . All designated ports are in a forwarding state.
- F . The switch must be the root bridge for all VLANs on this switch.
Which two commands can be used to verify a trunk link configuration status on a given cisco switch? (choose two)
- A . show interfaces interface
- B . show interfaces trunk
- C . show interfaces switchport
- D . show ip interface brief
- E . show interfaces vlan
Which two states are the port states when RSTP has converged? (choose two)
- A . blocking
- B . learning
- C . discarding
- D . forwarding
- E . listening
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