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Valid 200-125 Dumps with VCE and PDF for Free (Question 41 – Question 60)

New 200-125 exam questions from PassLeader 200-125 dumps! Welcome to download the newest PassLeader 200-125 VCE and PDF dumps: http://www.passleader.com/200-125.html (545 Q&As)

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Refer to the topology shown in the exhibit. Which ports will be STP designated ports if all the links are operating at the same bandwidth? (Choose three.)

A.    Switch A – Fa0/0
B.    Switch A – Fa0/1
C.    Switch B – Fa0/0
D.    Switch B – Fa0/1
E.    Switch C – Fa0/0
F.    Switch C – Fa0/1

Answer: BCD
This question is to check the spanning tree election problem.
1. First, select the root bridge, which can be accomplished by comparing the bridge ID, the smallest will be selected. Bridge-id= bridge priority + MAC address. The three switches in the figure all have the default priority, so we should compare the MAC address, it is easy to find that SwitchB is the root bridge.
2. Select the root port on the non-root bridge, which can be completed through comparing root path cost. The smallest will be selected as the root port.
3. Next, select the Designated Port. First, compare the path cost, if the costs happen to be the same, then compare the BID, still the smallest will be selected. Each link has a DP. Based on the exhibit above, we can find DP on each link. The DP on the link between SwitchA and SwitchC is SwitchA’Fa0/1, because it has the smallest MAC address.

Refer to the exhibit. How should the FastEthernet0/1 ports on the 2950 model switches that are shown in the exhibit be configured to allow connectivity between all devices?

A.    The ports only need to be connected by a crossover cable.
B.    SwitchX(config)# interface fastethernet 0/1
SwitchX(config-if)# switchport mode trunk
C.    SwitchX(config)# interface fastethernet 0/1
SwitchX(config-if)# switchport mode access
SwitchX(config-if)# switchport access vlan 1
D.    SwitchX(config)# interface fastethernet 0/1
SwitchX(config-if)# switchport mode trunk
SwitchX(config-if)# switchport trunk vlan 1
SwitchX(config-if)# switchport trunk vlan 10
SwitchX(config-if)# switchport trunk vlan 20

Answer: B
IN order for multiple VLANs to cross switches, the connection between the switches must be a trunk. The “switchport mode trunk” command is all that is needed, the individual VLANs should not be listed over that trunk interface.

Which three statements about RSTP are true? (Choose three.)

A.    RSTP significantly reduces topology reconverging time after a link failure.
B.    RSTP expands the STP port roles by adding the alternate and backup roles.
C.    RSTP port states are blocking, discarding, learning, or forwarding.
D.    RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.
E.    RSTP also uses the STP proposal-agreement sequence.
F.    RSTP uses the same timer-based process as STP on point-to-point links.

Answer: ABD

Refer to the exhibit. A frame on VLAN 1 on switch S1 is sent to switch S2 where the frame is received on VLAN 2. What causes this behavior?

A.    trunk mode mismatches
B.    allowing only VLAN 2 on the destination
C.    native VLAN mismatches
D.    VLANs that do not correspond to a unique IP subnet

Answer: C
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.

At which layer of the OSI model is RSTP used to prevent loops?

A.    physical
B.    data link
C.    network
D.    transport

Answer: B

What does a Layer 2 switch use to decide where to forward a received frame?

A.    source MAC address
B.    source IP address
C.    source switch port
D.    destination IP address
E.    destination port address
F.    destination MAC address

Answer: F
When a frame is received, the switch looks at the destination hardware address and finds the interface if it is in its MAC address table. If the address is unknown, the frame is broadcast on all interfaces except the one it was received on.

Refer to the exhibit. Which statement is true?

A.    The Fa0/11 role confirms that SwitchA is the root bridge for VLAN 20.
B.    VLAN 20 is running the Per VLAN Spanning Tree Protocol.
C.    The MAC address of the root bridge is 0017.596d.1580.
D.    SwitchA is not the root bridge, because not all of the interface roles are designated.

Answer: D
1. Only non-root bridge can have root port. Fa0/11 is the root port so we can confirm this switch is not the root bridge.
2. From the output we learn this switch is running Rapid STP, not PVST.
3. 0017.596d.1580 is the MAC address of this switch, not of the root bridge. The MAC address of the root bridge is 0017.596d.2a00.
4. All of the interface roles of the root bridge are designated. SwitchA has one Root port and 1 Alternative port so it is not the root bridge.

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

A.    added security
B.    dedicated bandwidth
C.    provides segmentation
D.    allows switches to route traffic between subinterfaces
E.    contains collisions

Answer: AC
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.

Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?

A.    pingaddress
B.    tracertaddress
C.    tracerouteaddress
D.    arpaddress

Answer: A
ICMP pings are used to verify connectivity between two IP hosts. Traceroute is used to verify the router hop path traffic will take but in this case since the hosts are in the same LAN there will be no router hops involved.

Based on the network shown in the graphic. Which option contains both the potential networking problem and the protocol or setting that should be used to prevent the problem?

A.    routing loops, hold down timers
B.    switching loops, split horizon
C.    routing loops, split horizon
D.    switching loops, VTP
E.    routing loops, STP
F.    switching loops, STP

Answer: F
The Spanning-Tree Protocol (STP) prevents loops from being formed when switches or bridges are interconnected via multiple paths. Spanning-Tree Protocol implements the 802.1D IEEE algorithm by exchanging BPDU messages with other switches to detect loops, and then removes the loop by shutting down selected bridge interfaces. This algorithm guarantees that there is one and only one active path between two network devices.

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

A.    Host E and host F use the same IP gateway address.
B.    Router1 and Switch2 should be connected via a crossover cable.
C.    Router1 will not play a role in communications between host A and host D
D.    The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces.
E.    Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit.
F.    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: DF

Which two of these are characteristics of the 802.1Q protocol? (Choose two.)

A.    It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topology changes.
B.    It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
C.    It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.
D.    It includes an 8-bit field which specifies the priority of a frame.
E.    It is a trunking protocol capable of carrying untagged frames.

Answer: BE
802.1Q protocol, or Virtual Bridged Local Area Networks protocol, mainly stipulates the realization of the VLAN. 802.1Q is a standardized relay method that inserts 4 bytes field into the original Ethernet frame and re-calculate the FCS. 802.1Q frame relay supports two types of frame: marked and non-marked. Non-marked frame carries no VLAN identification information.

Refer to the exhibit. Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made. Which three of these show the correct RSTP port roles for the indicated switches and interfaces? (Choose three.)

A.    SwitchA, Fa0/2, designated
B.    SwitchA, Fa0/1, root
C.    SwitchB, Gi0/2, root
D.    SwitchB, Gi0/1, designated
E.    SwitchC, Fa0/2, root
F.    SwitchD, Gi0/2, root

Answer: ABF

What is one benefit of PVST+?

A.    PVST+ supports Layer 3 load balancing without loops.
B.    PVST+ reduces the CPU cycles for all the switches in the network.
C.    PVST+ allows the root switch location to be optimized per VLAN.
D.    PVST+ automatically selects the root bridge location, to provide optimized bandwidth usage.

Answer: C
The PVST+ provides Layer 2 load-balancing for the VLAN on which it runs. You can create different logical topologies by using the VLANs on your network to ensure that all of your links are used but that no one link is oversubscribed. Each instance of PVST+ on a VLAN has a single root switch. This root switch propagates the spanning-tree information associated with that VLAN to all other switches in the network. Because each switch has the same information about the network, this process ensures that the network topology is maintained and optimized per VLAN.

Refer to the exhibit. The network administrator normally establishes a Telnet session with the switch from host A . However, host A is unavailable. The administrator’s attempt to telnet to the switch from host B fails, but pings to the other two hosts are successful. What is the issue?

A.    Host B and the switch need to be in the same subnet.
B.    The switch interface connected to the router is down.
C.    Host B needs to be assigned an IP address in VLAN 1.
D.    The switch needs an appropriate default gateway assigned.
E.    The switch interfaces need the appropriate IP addresses assigned.

Answer: D
Ping was successful form host B to other hosts because of intervlan routing configured on router. But to manage switch via telnet the VLAN32 on the switch needs to be configured interface vlan32 along with ip address and its appropriate default-gateway address. Since VLAN1 interface is already configure on switch Host A was able to telnet switch.

Which are valid modes for a switch port used as a VLAN trunk? (Choose three.)

A.    transparent
B.    auto
C.    on
D.    desirable
E.    blocking
F.    forwarding

Answer: BCD

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

A.    Switch1
B.    Switch2
C.    Switch3
D.    Switch4

Answer: C
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.

Refer to Exhibit. How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches?

A.    one
B.    two
C.    six
D.    twelve

Answer: A
Only router can break up broadcast domains but in this exhibit no router is used so there is only 1 broadcast domain. For your information, there are 7 collision domains in this exhibit (6 collision domains between hubs & switches + 1 collision between the two switches).

Which three of these statements regarding 802.1Q trunking are correct? (Choose three.)

A.    802.1Q native VLAN frames are untagged by default.
B.    802.1Q trunking ports can also be secure ports.
C.    802.1Q trunks can use 10 Mb/s Ethernet interfaces.
D.    802.1Q trunks require full-duplex, point-to-point connectivity.
E.    802.1Q trunks should have native VLANs that are the same at both ends.

Answer: ACE
By default, 802.1Q trunk defined Native VLAN in order to forward unmarked frame. Switches can forward Layer 2 frame from Native VLAN on unmarked trunks port. Receiver switches will transmit all unmarked packets to Native VLAN. Native VLAN is the default VLAN configuration of port. Note for the 802.1Q trunk ports between two devices, the same Native VLAN configuration is required on both sides of the link. If the Native VLAN in 802.1Q trunk ports on same trunk link is properly configured, it could lead to layer 2 loops. The 802.1Q trunk link transmits VLAN information through Ethernet.

Refer to the exhibit. The output that is shown is generated at a switch. Which three 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.    This switch must be the root bridge for all VLANs on this switch.

Answer: ACE
1. From the output, we see that all ports are in Designated role (forwarding state). The command “show spanning-tree vlan 30 only shows us information about VLAN 30. We don’t know how many VLAN exists in this switch.
2. The bridge priority of this switch is 24606 which is lower than the default value bridge priority 32768.
3. All three interfaces on this switch have the connection type “p2p”, which means Point-to-point environment ?not a shared media.
4. The only thing we can specify is this switch is the root bridge for VLAN 3o but we can not guarantee it is also the root bridge for other VLANs.

New 200-125 exam questions from PassLeader 200-125 dumps! Welcome to download the newest PassLeader 200-125 VCE and PDF dumps: http://www.passleader.com/200-125.html (545 Q&As)

P.S. Free 200-125 dumps are available on Google Drive shared by PassLeader: https://drive.google.com/open?id=0B-ob6L_QjGLpeHlmcExhU2FVY00