6.3 Dynamic Routing Flashcards
What are the three components of Dynamic routing protocols
Data structures
Routing protocol messages
Algorithms
What do you call a organization with an assigned network address from an ISP
autonomous system
Describe a Internal routing protocol or a interior Gateway Protocol (IGPS)
used to send information between devices within an organization’s routing domain.
Describe an external routing protocol or an External Gateway protocol (EGP)
used by ISPs to send packets across the internet from one network to another.
What are some of the Interior Gateway Protocols
Routing Information Protocol (RIP) Open Shortest Path First (OSPF) Interior Gateway Routing Protocol (IGRP) Intermediate System-to-Intermediate System (IS-IS) Enhanced IGRP (EIGRP)
What is one of the Exterior Gateway Protocols
Border Gateway Protocol (BGP
Describe equal cost load balancing
In the event a router has more than one path to the same destination with the same cost metric, the router will forward the packets using both paths.
Describe the protocol Routing Information Protocol (RIP) metric
considers hop count. Hop count is determined by the number of routers along a path. Each router equals one hop count. No more than 15 hop counts are permitted for a route.
Describe the Open shortest path first metric
considers the cost. Cost is determined by the total bandwidth available from origination to destination. Better bandwidth gets a lower cost. Slower bandwidth gets a higher cost.
Describe the Enhanced Interior gateway Routing Protocol metric
uses a metric that considers the slowest bandwidth, dependability of a path, load, and delay values.
What are the three primary algorithms used to determine the best path
Distance vector
Link state
Path vector
What is Distance Vector Routing?
routing protocol in data networks determines the best route for data packets based on distance
What are the principles of the distance vector method
Routers send updates only to their neighbor routers.
Routers send their entire routing table.
Tables are sent at regular intervals. Each router is configured to specify its own update interval.
Routers modify their tables based on information received from their neighbors.
Describe a routing loop/ count-to-infinity condition
when two routers have different information in the routing table.
Define the Link-State Routing Protocols
maintains an entire map of your network , very demanding on ram and cpu and is more complex
Name some of the advantages of Link-state Routing
Less convergence time (because updates are forwarded immediately)
Not susceptible to routing loops
Less susceptible to erroneous information (because only firsthand information is broadcast)
Negligible bandwidth requirements for a typical LAN environment
Name some of the disadvantages of Link-state Routing
Because the algorithm re-creates the exact topology of the network for route computation, the link-state algorithm requires greater CPU and memory capability to calculate the network topology and select the route.
It generates a high amount of traffic when LSPs are initially flooded through the network or when the topology changes. However, after the initial configuration occurs, the traffic from the link-state method is smaller than that from the distance vector method.
It is possible for LSPs to get delayed or lost, resulting in an inconsistent view of the network. This is particularly a problem for larger networks and is also a problem if parts of the network come online at different times or if the bandwidth between links varies. For example, LSPs travel faster through some parts of the network than through others.
What is EIGRP Enhanced Interior Gateway Routing Protocol ?
an advanced distance-vector routing protocol that is used on a computer network for automating routing decisions and configuration.
How does EIGRP work?
used on a router to share routes with other routers within the same autonomous system. Unlike other well known routing protocols, such as RIP, EIGRP only sends incremental updates, reducing the workload on the router and the amount of data that needs to be transmitted.
Describe How OSPF works
Determines the shortest path to a given device by bandwith between the devices
Explain how RIP works
Dertermines the quickest route to a device by the number of hops needed to get to the device
