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Questions and Answers
What does a Link-state routing protocol recreate?
What does a Link-state routing protocol recreate?
Which type of routing protocol focuses on routing metric components?
Which type of routing protocol focuses on routing metric components?
What is a key feature of a Distance vector routing protocol?
What is a key feature of a Distance vector routing protocol?
In routing, what is the main focus of Link-state concepts?
In routing, what is the main focus of Link-state concepts?
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What does a Distance vector concept mainly emphasize?
What does a Distance vector concept mainly emphasize?
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Which type of protocol concerns itself with IP routing configuration task steps?
Which type of protocol concerns itself with IP routing configuration task steps?
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What is the primary focus of Link-state concerns in routing protocols?
What is the primary focus of Link-state concerns in routing protocols?
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What aspect of the internetwork does Distance vector network discovery aim to understand?
What aspect of the internetwork does Distance vector network discovery aim to understand?
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What is the main objective of Path determination in routing?
What is the main objective of Path determination in routing?
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Which element do Link-state topology changes primarily affect in a network?
Which element do Link-state topology changes primarily affect in a network?
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Explain the main difference between link-state and distance vector routing protocols.
Explain the main difference between link-state and distance vector routing protocols.
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What does the term 'Distance vector network discovery' refer to in routing protocols?
What does the term 'Distance vector network discovery' refer to in routing protocols?
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How do link-state topology changes impact network operations?
How do link-state topology changes impact network operations?
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What are the primary components of routing metrics in routing protocols?
What are the primary components of routing metrics in routing protocols?
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How does IP routing configuration play a role in routing protocols?
How does IP routing configuration play a role in routing protocols?
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Study Notes
Routing Protocols and Concepts
Introduction to Routing
- Routing is the process of finding a path for forwarding packets between networks.
- Routing protocols are used to build and maintain routing tables.
- A routed protocol provides enough information in its network layer address to allow a packet to be forwarded from one host to another based on the addressing scheme.
Configuring Static Routes
- A static route is a route that is manually configured by a network administrator.
- Static routes are used for backup purposes when the dynamically learned route has failed.
- Administrative Distance (AD) is a value that determines the priority of a route.
- A route with a lower AD will be installed before a similar route with a higher AD.
- Static routes can be configured using an outgoing interface or a next-hop address.
Default Route Forwarding
- Default routes are used to route packets with destinations that do not match any of the other routes in the routing table.
- Default routes can be configured using an outgoing interface or a next-hop address.
Verifying Static Route Configuration
- Use the "show ip route" and "show running-config" commands to verify static route configuration.
- Both commands must be used because some paths with lower AD may not be shown in the routing table, but their configurations are shown in running-config.
Dynamic Routing Overview
- Dynamic routing protocols are used to build and maintain routing tables.
- Autonomous systems (AS) are collections of networks under a common administration that share a common routing strategy.
- AS numbers are assigned by the American Registry of Internet Numbers (ARIN), a service provider, or an administrator.
Classes of Routing Protocols
- Distance vector protocols determine the direction, or vector, and distance to any link in an internetwork.
- Examples of distance vector protocols include RIP, IGRP, EIGRP, and BGP.
- Link-state protocols recreate the exact topology of an entire internetwork.
- Examples of link-state protocols include OSPF.
Purpose of Routing Protocols
- The purpose of a routing protocol is to ensure that all routers in an internetwork operate with the same knowledge.
- When all routers in an internetwork operate with the same knowledge, the internetwork is said to have converged.
- Fast convergence is desirable because it reduces the period of time in which routers would continue to make incorrect routing decisions.
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Description
Test your knowledge on routing protocols such as Cisco IGRP, RIP, EIGRP, OSPF, and BGP. Understand the purpose of a routing protocol in autonomous systems and how networks converge when there are topology changes.
