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 15,2025.

Exam Code: 200-125
Exam Name: CCNA Cisco Certified Network Associate CCNA (v3.0)
Certification Provider: Cisco
Latest update: Sep 15,2025

Question #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?

A . SwitchB(config)#interface FastEthernet 0/1
SwitchB(config)#ip address 192.168.8.252 255.255.255.0
SwitchB(config)#no shutdown
B . 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
C . 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
D . 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

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Question #32

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

A . They increase the size of collision domains.
B . They allow logical grouping of users by function.
C . They can enhance network security.
D . They increase the size of broadcast domains while decreasing the number of collision domains.
E . They increase the number of broadcast domains while decreasing the size of the broadcast domains.
F . They simplify switch administration.

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Question #33

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

A . A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure
B . Broadcast storms can be mitigated by decreasing the number of broadcast domains, thus increasing their size.
C . A higher level of network security can be reached by separating sensitive data traffic from other network traffic.
D . Port-based vlans increase switch-port use efficient, thanks to 802.1Q trunks
E . A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure.
F . Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size.
G . VLANs make it easier for IT staff to configure new logical groups, because the vlans all belong to the same broadcast domain.

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Question #34

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

A . Microsegmentation decreases the number of collisions on the network.
B . if a switch receives a frame for an unkown destination, it uses ARP to resolve the address.
C . Spanning Tree Protocol allows switches to automatically share vlan information.
D . 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.
E . Establishing vlans increases the number of broadcast domains.
F . Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.

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Question #35

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

A . The transport layer divides a data stream into segments and may add reliability and flow control information.
B . The data link layer adds physical source and destination addresses and an FCS to the segment.
C . Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D . Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E . The presentation layer translates bits into voltages for transmission across the physical link.

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Question #36

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

A . A CSU/DSU terminates a digital local loop
B . A modem terminates a digital local loop
C . A CSU/DSU terminates an analog local loop
D . A modem terminates an analog local loop
E . A router is commonly considered a DTE device
F . A router is commonly considered a DCE device

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Question #37

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

A . no earner
B . late collisions
C . giants
D . CRC errors
E . deferred
F . runts

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Question #38

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

A . PQ
B . CBWFQ
C . round robin
D . RSVP

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Question #39

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

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

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Question #40

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

A . It uses a single SYN-ACK message to establish a connection.
B . The connection is established before data is transmitted.
C . It ensures that all data is transmitted and received by the remote device.
D . It supports significantly higher transmission speeds than UDP.
E . It requires applications to determine when data packets must be retransmitted.
F . It uses separate SYN and ACK messages to establish a connection.

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