200-125 practice test

1. Question 1 · 1

   A network administrator needs to configure port security on a switch. Which two statements are true? (Choose two.)

   Choose all answers that apply.

   • The network administrator can apply port security to dynamic access ports.
   • The network administrator can apply port security to EtherChannels.
   • The sticky learning feature allows the addition of dynamically learned addresses to the running configuration.
   • When dynamic MAC address learning is enabled on an interface, the switch can learn new addresses, up to the maximum defined.
   • The network administrator can configure static secure or sticky secure MAC addresses in the voice VLAN.

2. Question 2 · 1

   Which command can you enter to view the ports that are assigned to VLAN 20?

   Choose one answer.

   • Switch#show ip interface vlan 20
   • Switch#show vlan id 20
   • Switch#show ip interface brief
   • Switch#show interface vlan 20

3. Question 3 · 1

   In which two formats can the IPv6 address fd15:0db8:0000:0000:0700:0003:400F:572B be written? (Choose two.)

   Choose all answers that apply.

   • fd15:0db8:0000:0000:700:3:400F:527B
   • fd15::db8::700:3:400F:527B
   • fd15:db8:0::700:3:4F:527B
   • fd15:0db8::7:3:4F:527B
   • fd15:db8::700:3:400F:572B

4. Question 4 · 1

   Which statement about spanning-tree root-bridge election is true?

   Choose one answer.

   • Every root bridge must reside on the same root switch.
   • Every VLAN must use the same root bridge.
   • It is always performed automatically.
   • Each VLAN must have its own root bridge.

5. Question 5 · 1

   Which two steps must you perform to enable router-on-a-stick on a switch? (Choose two.)

   Choose all answers that apply.

   • Configure the subinterface number exactly the same as the matching VLAN.
   • Assign the access port to a VLAN.
   • Configure an IP route to the VLAN destination network.
   • Connect the router to a trunk port.
   • Configure full duplex.

6. Question 6 · 1

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

   Choose one answer.

   • It continues operating normally.
   • It goes into a down/down state.
   • It becomes the root bridge for the configured VLAN.
   • It goes into an errdisable state.

7. Question 7 · 1

   Which symptom most commonly indicates that two connecting interfaces are configured with a duplex mismatch?

   Choose one answer.

   • an interface with a down/down status
   • the spanning-tree process shutting down
   • collisions on the interface
   • an interface with an up/down status

8. Question 8 · 1

   Which three technical services support cloud computing? (Choose three.)

   Choose all answers that apply.

   • IP localization
   • VPN connectivity
   • extended SAN services
   • redundant connections
   • Layer 3 network routing
   • network-monitored power sources

9. Question 9 · 1

   Which two statements about syslog logging are true? (Choose two.)

   Choose all answers that apply.

   • The size of the log is dependent on the resources of the device.
   • Messages can be erased when the device reboots.
   • Messages are stored external to the device.
   • Messages are stored in the internal memory of the device.
   • Syslog logging is disabled by default.

10. Question 10 · 1

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

    Choose all answers that apply.

    • 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 UDP.
    • It requires applications to determine when data packets must be retransmitted.
    • It uses separate SYN and ACK messages to establish a connection.

11. Question 11 · 1

    Instructions: - Enter IOS commands on the device to verify network operation and answer the multiple questions. - THIS TASK DOES NOT REQUIRE REVICE CONFIGURATION. - Click the device icon to gain access to the console device of the router. No console or enable passwords are required. - To access the multiple-choice questions, click the numbered boxes on the left of the top panel. - there are four multiple-choice questions with this task. Be sure to answer all four questions before clicking Next button. Scenario: Refer to the topology. Your company has connected the routers R1, R2, and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5. The EIGRP routing protocol is configured. You are required to troubleshoot and resolve the EIGRP issues between the various routers. Use the appropriate show commands to troubleshoot the issues. The loopback interfaces on R4 with the IP addresses of 10.4.4.4/32, 10.4.4.5/32 and 10.4.4.6/32 are not appearing in the routing table of R5. Why are the interfaces missing?

    Choose one answer.

    

    • The interfaces are shutdown, so they are not being advertised.
    • R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
    • Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
    • The loopback addresses haven’t been advertised, and the network command is missing on R4.

    Read explanation

    Relevant parts of the config shown below:

12. Question 12 · 1

    Which two options describe benefits of aggregated chassis technology? (Choose two.)

    Choose all answers that apply.

    • It supports redundant configuration files.
    • It reduces management overhead.
    • It requires only three IP addresses per VLAN.
    • It requires only one IP address per VLAN.
    • It supports HSRP, VRRP, and GLBP.
    • Switches can be located anywhere regardless of their physical distance from one another.

13. Question 13 · 1

    Which function does the IP SLAs ICMP Echo operation perform to assist with troubleshooting?

    Choose one answer.

    • packet-loss detection
    • congestion detection
    • hop-by-hop response time
    • one way jitter measurements

14. Question 14 · 1

    In which byte of an IP packet can traffic be marked?

    Choose one answer.

    • the ToS byte
    • the QoS byte
    • the CoS byte
    • the DSCP byte

15. Question 15 · 1

    Which six-byte field in a basic Ethernet frame must be an individual address?

    Choose one answer.

    • SOF
    • FCS
    • DA
    • SA

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