READ Free Dumps For Cisco- 200-125
| Question ID 16077 | Which statements describe the routing protocol OSPF? (Choose three.)
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| Option A | It supports VLSM.
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| Option B | It is used to route between autonomous systems.
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| Option C | It confines network instability to one area of the network.
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| Option D | It increases routing overhead on the network.
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| Option E | It allows extensive control of routing updates.
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| Option F | It is simpler to configure than RIP v2.
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| Correct Answer | A,C,E |
Explanation Explanation: The OSPF protocol is based on link-state technology, which is a departure from the Bellman-Ford vector based algorithms used in traditional Internet routing protocols such as RIP. OSPF has introduced new concepts such as authentication of routing updates, Variable Length Subnet Masks (VLSM), route summarization, and so forth. OSPF uses flooding to exchange link-state updates between routers. Any change in routing information is flooded to all routers in the network. Areas are introduced to put a boundary on the explosion of link-state updates. Flooding and calculation of the Dijkstra algorithm on a router is limited to changes within an area.
| Question ID 16078 | What is a global command?
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| Option A | a command that is set once and affects the entire router
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| Option B | a command that is implemented in all foreign and domestic IOS versions
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| Option C | a command that is universal in application and supports all protocols
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| Option D | a command that is available in every release of IOS, regardless of the version or deployment status
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| Option E | a command that can be entered in any configuration mode
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| Correct Answer | A |
Explanation Explanation: When you enter global configuration mode and enter a command, it is applied to the running configuration file that is currently running in ram. The configuration of a global command affects the entire router. An example of a global command is one used for the hostname of the router.