Testking_640-802_V13

A.This is incorrect because the function is redundant.

B.This incorrect because the switch must be in server or transparent mode to create and change VLANs.

D.This is incorrect because if VTP would be disabled, it wouldn't appear on the command output.

E.If this were true, the VTP configuration information would not be displayed after being powered on.

QUESTION NO: 10

Exhibit:

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Study the Exhibit carefully. The network administrator has configured the switches in the school network to use VTP. The switches are not sharing VLAN information. Which sequence of commands should be issued to correct this problem?

A.Offices(config)# vtp mode client Labs(config)# vtp mode client

B.Offices(config)# vtp domain School Labs(config)# vtp domain School

C.Offices(config)# vtp pruning Labs(config)# vtp pruning

D.Offices(config)# vtp version 2 Labs(config)# vtp version 2

Answer: B Explanation:

For switched to share vlan information, there VTP domain names must be same. In the Output shown, VTP domain name of LABS router is Labs and VTP domain name of Offices router is Offices. As the domain names are different, they are unable to communicate with each other. In order to correct this problem, we have to change their names to a single common name.

QUESTION NO: 11

Two TestKing switches are connected together as shown below:

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Switches TK1 and TK2 have been configured with a trunked line that has been verified as working correctly. However, VTP is not propagating VLANs from one switch to the other. Based on the command output shown, what is the problem?

A.The revision number is not the same on both switches.

B.Only one switch can be in server mode.

C.The VTP domain name is not correctly configured.

D.VLANs have not been configured on the VTP server.

E.The VTP pruning mode is not correctly configured.

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Answer: C Explanation:

VTP messages are exchanged between switches within a common VTP domain. In the output shown, VTP domain name of switch TK1 is JAX and domain name of switch TK2 is JAK. As the VTP domain names are different so these two switches will not exchange the VTP Information.

Reference: http://www.ciscopress.com/articles/article.asp?p=29803&seqNum=4&rl=1

Section 14: Configure, verify, and troubleshoot RSTP operation (5 questions)

QUESTION NO: 1

A simple TestKing network is displayed in the diagram below:

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When PC1 sends an ARP requests for the MAC address of PC2, network performance slows dramatically, and the TestKing switches detect an unusually high number of broadcast frames. What is the most likely cause of this?

A.The portfast feature is not enabled on all switch ports.

B.The PCs are in two different VLANS.

C.Spanning Tree Protocol is not running on the switches.

D.PC2 is down and is not able to respond to the request.

E.The VTP version running on the two switches do not match.

F.None of the above

Answer: C

Explanation:

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As the switches TK1 and TK2 are connected with each other via two links, spanning tree must be enabled on both switches to avoid switching loops and broadcast storms. An ARP request is a broadcast message. If Spanning tree is not running, broadcast loops will form reducing the performance of the network.

QUESTION NO: 2

Four TestKing switches are connected together as shown in the network below:

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Study the Exhibit carefully. Based on the Spanning Tree Protocol port states shown, over which path will frames flow when set from PC1 to PC2?

A.TK1-TK3-TK4

B.TK1-TK2-TK4

C.TK1-TK2-TK3-TK4

D.TK1-TK3-TK2-TK4

E.None of the above

Answer: B Explanation:

As shown in the diagram, port connecting TK3 to TK4 and TK2 to TK3 are non-designated ports. It means that spanning tree has blocked these ports temporarily so; frames will not flow through these ports. The communication will be done via TK1 to TK2 to TK4 through ROOT and DESIGNATED ports.

QUESTION NO: 3

The TestKing LAN network for one of the offices is displayed below:

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Assuming there is only one VLAN in this network, which switch is acting as the root bridge?

A.Testking1

B.Testking2

C.Testking3

D.A root bridge is not required in this network.

E.None of the above

Answer: C Explanation:

A root switch has all ports in non-blocking mode. Based on the diagram above, Testking1 and Testking2 contain ports that have been blocked by the STP process, so Testking3 must be the root bridge.

QUESTION NO: 4

Four TestKing switches are connected as shown in the exhibit below:

Refer to the exhibit above. Based on the information given, which switch will be elected root bridge and why?

A.Switch A, because it has the lowest MAC address

B.Switch A, because it is the most centrally located switch

C.Switch B, because it has the highest MAC address

D.Switch C, because it is the most centrally located switch

E.Switch C, because it has the lowest priority

F.Switch D, because it has the highest priority

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Answer: E Explanation:

To elect the root bridge in the LAN, first check the priority value. The switch having the lowest priority will win the election process. If Priority Value is the same then it checks the MAC Address; the switch having the lowest MAC Address will become the root bridge. In this case, switch C has the lowest MAC Address so it becomes the root bridge.

QUESTION NO: 5

TestKing is experiencing network delays. The network administrator discovers that a worker in a location far from the MDF has connected an old 10BASE-T switch with redundant links to the existing network. How could this action be responsible for the impaired network performance?

A.Connecting a host to the old switch has created a broadcast storm.

B.The 10BASE-T switch forced the entire network to be reduced to 10 Mbps operation.

C.The old switch does not support VLANs, which has disabled the VLAN configuration of the entire the network.

D.The old switch does not support full-duplex operation, effectively forcing half-duplex operation throughout the network.

E.Spanning Tree Protocol has elected the old switch as the root bridge, creating inefficient data paths through the switched network.

F.None of the above

Answer: E Explanation:

Without the Spanning Tree Protocol (STP), frames would loop for an indefinite period of time in networks with physically redundant links. To prevent looping frames, STP blocks some ports from forwarding frames so that only one active path exists between any pair of LAN segments (collision domains). The result of STP is good: Frames do not loop infinitely, which makes the LAN usable. However, the network uses some redundant links in case of a failure, but not for balancing traffic.

To avoid loops, all bridging devices, including switches, use STP. STP causes each interface on a bridging device to settle into a blocking state or a forwarding state. Blocking means that the interface cannot forward or receive data frames. Forwarding means that the interface can send and receive data frames. By having a correct subset of the interfaces blocked, a single currently active logical path will exist between each pair of LANs. STP behaves identically for a transparent bridge and a switch. So, the terms bridge, switch, and bridging device all are used interchangeably when discussing STP.

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