READ Free Dumps For Cisco- 200-125
| Question ID 16041 | Refer to the topology shown in the exhibit.
Which three ports will be STP designated ports if all the links are operating at the same
bandwidth? (Choose three.)
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| Option A | Switch A - Fa0/0
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| Option B | Switch A - Fa0/1
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| Option C | Switch B - Fa0/0
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| Option D | Switch B - Fa0/1
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| Option E | Switch C - Fa0/0
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| Option F | Switch C - Fa0/1
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| Correct Answer | B,C,D |
Explanation Explanation: 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.
| Question ID 16042 | What are three benefits of implementing VLANs? (Choose three.)
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| Option A | A higher level of network security can be reached by separating sensitive data traffic from other network traffic.
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| Option B | A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure.
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| Option C | A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure.
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| Option D | Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size.
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| Option E | Broadcast storms can be mitigated by decreasing the number of broadcast domains, thus increasing their size.
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| Option F | 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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| Correct Answer | A,C,D |
Explanation Explanation: Benefits of VLANs VLAN is a network structure which allows users to communicate while in different locations by sharing one multicast domain and a single broadcast. They provide numerous networking benefits and have become popular in the market. For instance, it helps reduce administrative costs when users are geographically dispersed. 1. Inexpensive The popularity of VLANs is due to the fact that changes, adds, and moves can be attained simply by making necessary configurations on the VLAN port. Time-consuming, re- addressing, and host reconfigurations is now a thing of the past, because network configuration can be made at ease when need arises. 2. Better management A VLAN typically solve the scalability issues that exist in a large network by breaking the main domain into several VLAN groups or smaller broadcast configurations, thereby encourage better control of multicast traffic as well as broadcast domains. 3. Improves network security High-security can be positioned in different VLAN groups to ensure that non-members cannot receive their broadcasts. On the other hand, a router is added and workgroups relocated into centralized locations. 4. Enhances performance A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure. 5. Segment multiple networks VLANs are typically used to achieve multiple purposes. They are popularly used to reduce broadcast traffic. Each VLAN creates a separate, smaller broadcast domain. 6. Better administration VLANs facilitate grouping of multiple geographical stations. When VLAN users move to another physical location, the network does not have to be configured.