1. Cisco switches have a feature called PortFast, which corresponds to an edge p
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Question
1. Cisco switches have a feature called PortFast, which corresponds to an edge port in RSTP. When should this feature be employed in a switched network? What problems does it solve?
2. Use the web or Chapter 5 from TopDown Network Design to explain the purpose of trunk links. What protocols, both open and Cisco proprietary, are used on trunk links?
3. What is a unidirectional link in a switched network topology? Why could a unidirectional link create problems in a switched network?
4. An important concept in both switches and routed networks is that of convergence. Explain what it is and why it is important in modern networks.
5. Describe the main differences between distancevector routing protocols and linkstate routing protocols.
6. If you were redesigning a large enterprise network at a company with experienced network engineers, would you choose to implement a distancevector or a linkstate routing protocol in the network? Explain the reason for your choice.
7. Which of the following routing protocols have updates or versions that work with IPv6: EIGRP, RIP, OSPF, and BGP? [requires Web research]
Explanation / Answer
5.
The difference between distance vector and link state routing protocols are:
- All the networks near to the each router will sends a nearby network list in distance vector protocols.
- The directly attached networks or adjacent routers are described by the each router and they are connected directly to the objects. These kind of protocol is known as the state routing protocols.
- In link state routing protocols any kind of information will be unchanged from one router to another why because at last all the routers will know the details of every other router and their interfaces and where they have been connected information.
- In link state routing protocols all the network topology and interconnections are known by each router so thats the reason we called this protocol as a state of a link.
- The network topology is not identified and advertised by any distance vector routing protocols.
- And the information of how the network connectivity done will not known by any of the routers in distance vector routing protocol.
- The direct connectivity of nearby networks are known only by the distace vector routing protocol.
- The protocol which allows the router to have complete information of network mapping is known as Link state routing protocol.
- The distance vector protocols are easier to implement and design in software. So that the reason behind popularity of that protocol.
- The Link state protocols are very complex and more processing power is needed and also it needs more memory. So that the reason behind not having popularity to that protocol.
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