[Free] 2017(July) EnsurePass Examcollection Cisco 200-125 Dumps with VCE and PDF 41-50

2017 July Cisco Official New Released 200-125
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CCNA Cisco Certified Network Associate CCNA (v3.0)

Question No: 41 – (Topic 2)

Which statement about VLAN operation on Cisco Catalyst switches is true?

  1. When a packet is received from an 802.1Q trunk, the VLAN ID can be determined from the source MAC address and the MAC address table.

  2. Unknown unicast frames are retransmitted only to the ports that belong to the same VLAN.

  3. Broadcast and multicast frames are retransmitted to ports that are configured on different VLAN.

  4. Ports between switches should be configured in access mode so that VLANs can span across the ports.

Answer: B Explanation:

Each VLAN resides in its own broadcast domain, so incoming frames with unknown destinations are only transmitted to ports that reside in the same VLAN as the incoming frame.

Question No: 42 – (Topic 2)

Refer to the exhibit.


What set of commands was configured on interface Fa0/3 to produce the given output?

  1. interface FastEthernet 0/3 channel-group 1 mode desirable switchport trunk encapsulation dot1q switchport mode trunk

  2. interface FastEthernet 0/3 channel-group 2 mode passive switchport trunk encapsulation dot1q switchport mode trunk

  3. interface FastEthernet 0/3 channel-group 2 mode active switchport trunk encapsulation dot1q switchport mode trunk

  4. interface FastEthernet 0/3 channel-group 2 mode on

switchport trunk encapsulation dot1q switchport mode trunk

Answer: B Explanation:

Based on the output shown, the configured channel group number was 2 and the mode used was passive, so only choice B is correct.

Question No: 43 – (Topic 2)

Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13. An 802.1Q trunk is configured between the two switches. On CAT1, VLAN 10 is chosen as native, but on CAT2 the native VLAN is not specified.

What will happen in this scenario?

  1. 802.1Q giants frames could saturate the link.

  2. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send untagged frames.

  3. A native VLAN mismatch error message will appear.

  4. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send tagged frames.

Answer: C


A 鈥渘ative VLAN mismatch鈥?error will appear by CDP if there is a native VLAN mismatch on an 802.1Q link. 鈥淰LAN mismatch鈥?can cause traffic from one vlan to leak into another vlan.

Question No: 44 – (Topic 2)

Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?

  1. converged

  2. redundant

  3. provisioned

  4. spanned

Answer: A Explanation:

Spanning Tree Protocol convergence (Layer 2 convergence) happens when bridges and switches have transitioned to either the forwarding or blocking state. When layer 2 is converged, root bridge is elected and all port roles (Root, Designated and Non-Designated) in all switches are selected.

Question No: 45 – (Topic 2)

Refer to the exhibit.


A frame on VLAN 1 on switch S1 is sent to switch S2 where the frame is received on VLAN

  1. What causes this behavior?

    1. trunk mode mismatches

    2. allowing only VLAN 2 on the destination

    3. native VLAN mismatches

    4. VLANs that do not correspond to a unique IP subnet

Answer: C Explanation:

Untagged frames are encapsulated with the native VLAN. In this case, the native VLANs are different so although S1 will tag it as VLAN 1 it will be received by S2.

Question No: 46 – (Topic 2)

Which two link protocols are used to carry multiple VLANs over a single link? (Choose two.)


B. 802.1q

  1. IGP

  2. ISL

E. 802.3u

Answer: B,D Explanation:

Cisco switches can use two different encapsulation types for trunks, the industry standard 802.1q or the Cisco proprietary ISL. Generally, most network engineers prefer to use 802.1q since it is standards based and will interoperate with other vendors.

Question No: 47 – (Topic 2)

Refer to the exhibit.


Which switch provides the spanning-tree designated port role for the network segment that services the printers?

  1. Switch1

  2. Switch2

  3. Switch3

  4. Switch4

Answer: C Explanation:

Printers are connected by hubs. Decide the switch that provides the spanning-tree designated port role between Switch3 and Switch4. They have the same priority 32768. Compare their MAC addresses. Switch3 with a smaller MAC address will provide a designated port for printers.

Question No: 48 – (Topic 2)

Which two benefits are provided by creating VLANs? (Choose two.)

  1. added security

  2. dedicated bandwidth

  3. provides segmentation

  4. allows switches to route traffic between subinterfaces

  5. contains collisions

Answer: A,C Explanation:

A VLAN is a switched network that is logically segmented on an organizational basis, by functions, project teams, or applications rather than on a physical or geographical basis. Security:

VLANs also improve security by isolating groups. High-security users can be grouped into a VLAN, possible on the same physical segment, and no users outside that VLAN can communicate with them.

LAN Segmentation

VLANs allow logical network topologies to overlay the physical switched infrastructure such

that any arbitrary collection of LAN ports can be combined into an autonomous user group or community of interest. The technology logically segments the network into separate Layer 2 broadcast domains whereby packets are switched between ports designated to be within the same VLAN. By containing traffic originating on a particular LAN only to other LANs in the same VLAN, switched virtual networks avoid wasting bandwidth.

Question No: 49 – (Topic 2)

Refer to the exhibit.


Which two statements are true about interVLAN routing in the topology that is shown in the exhibit? (Choose two.)

  1. Host E and host F use the same IP gateway address.

  2. Router1 and Switch2 should be connected via a crossover cable.

  3. Router1 will not play a role in communications between host A and host D.

  4. The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces.

  5. Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit.

  6. The FastEthernet 0/0 interface on Router1 and the FastEthernet 0/1 interface on Switch2 trunk ports must be configured using the same encapsulation type.

Answer: D,F Explanation:

In order for multiple VLANs to connect to a single physical interface on a Cisco router, subinterfaces must be used, one for each VLAN. This is known as the router on a stick configuration. Also, for any trunk to be formed, both ends of the trunk must agree on the encapsulation type, so each one must be configured for 802.1q or ISL.

Question No: 50 – (Topic 2)

Refer to the exhibit.


Which two statements are true of the interfaces on Switch1? (Choose two.)

  1. Multiple devices are connected directly to FastEthernet0/1.

  2. A hub is connected directly to FastEthernet0/5.

  3. FastEthernet0/1 is connected to a host with multiple network interface cards.

  4. FastEthernet0/5 has statically assigned MAC addresses.

  5. FastEthernet0/1 is configured as a trunk link.

  6. Interface FastEthernet0/2 has been disabled.

Answer: B,E Explanation:

Carefully observe the information given after command show. Fa0/1 is connected to Switch2, seven MAC addresses correspond to Fa0/1, and these MAC are in different VLAN. From this we know that Fa0/1 is the trunk interface.

From the information given by show cdp neighbors we find that there is no Fa0/5 in CDP neighbor. However, F0/5 corresponds to two MAC addresses in the same VLAN. Thus we know that Fa0/5 is connected to a Hub.

Based on the output shown, there are multiple MAC addresses from different VLANs attached to the FastEthernet 0/1 interface. Only trunks are able to pass information from devices in multiple VLANs.

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