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What is the method that a routing protocol uses to determine the best route to a destination network?
It depends on the routing protocol in use, for example RIP uses the hop-count to determine the best route where less hops is better, OSPF uses cost, EIGRP uses a composite metric (BW + Delay + Reliability + Load) etc.
How is IGRP similar to RIP?
Interior Gateway Routing Protocol (IGRP) IGRP is a distance-vector interior gateway protocol (IGP). Distance-vector routing protocols call for each router to send all or a portion of its routing table in a routing-update message at regular intervals (every 90 seconds) to each of its neighboring routers. As routing information proliferates through the network, routers can calculate distances to all nodes within the internetwork. IGRP uses a combination (vector) of metrics. Internetwork delay, bandwidth, reliability, and load are all factored into the routing decision. Network administrators can set the weighting factors for each of these metrics. IGRP uses either the administrator-set or the default weightings to automatically calculate optimal routes.Routing Information Protocol (RIP) The Routing Information Protocol (RIP) is a distance-vector protocol that uses hop count as its metric. RIP is widely used for routing traffic in the global Internet and is an interior gateway protocol (IGP), which means that it performs routing within a single autonomous system. RIP only uses hop count to determine the best route to a remote network, RIP has a maximum hop count of 15, 16 is deemed unreachable. RIP works well in small internetworks, but is inefficient for large networks. RIP is susceptible to all the problems normally associated with distance vector routing protocols. It is slow to converge and forces routers to learn network information only from neighbors. RIP version 1 uses classful routing (all devices in the network must use the same subnet mask because RIP version 1 doesn't send updates with subnet information). RIP version 2 uses classless routing and does send subnet mask information with route updates. RIP networks need the same hop count to load balance multiple links.
What are features of RIP?
RIP Characteristics " RIP has the following key characteristics: RIP is a distance vector routing protocol. RIP uses hop count as its only metric for path selection. Advertised routes with hop counts greater than 15 are unreachable. Messages are broadcast every 30 seconds. The data portion of a RIP message is encapsulated into a UDP segment, with both source and destination port numbers set to 520. The IP header and data link headers add broadcast destination addresses before the message is sent out to all RIP configured interfaces.
Which information is used by the router to determine the path between the source and destination host?
The network portion of the IP address is information that is used by the router to determine the path between the source and destination hosts. The two types of media that are useful for connecting two devices that are separated by a distance of 500 meters is 1000 BASE-TX and 1000 BASE-SX.
What is 20 metric tons equal to tons?
20,000 grams
What allows RIP to avoid routing loops by advertising a metric of infinity?
Split horizon with poison reverse.
What metric does the RIP routing protocol consider to be infinity?
16
How does route poisoning prevent routing loops?
Failed routes are advertised with a metric of infinity.
What does a distance vector routing protocol let a router know about remote networks?
The availability of networks, and the metric (or "cost" or "distance") to reach them, according to the system used by the routing protocol to calculate this "metric".The availability of networks, and the metric (or "cost" or "distance") to reach them, according to the system used by the routing protocol to calculate this "metric".The availability of networks, and the metric (or "cost" or "distance") to reach them, according to the system used by the routing protocol to calculate this "metric".The availability of networks, and the metric (or "cost" or "distance") to reach them, according to the system used by the routing protocol to calculate this "metric".
What is poison reverse?
Poison reverse is a technique used in computer networking to prevent routing loops in distance-vector routing protocols. It involves advertising a route back to the neighbor it was learned from with an infinite metric to indicate that the route is unreachable. This helps to avoid packets being sent in circles during routing updates.
Where on the router can the actual values determining metric be viewed?
routing table
What is true about the metrics used by routing protocols?
Metrics used by routing protocols are used to determine the best path for routing data packets. Different routing protocols use various metrics such as hop count, bandwidth, delay, load, and cost to make routing decisions. The choice of metric can impact the efficiency and effectiveness of the routing protocol in selecting optimal paths.
When multiple routing protocols have a route to the same destination network what determines which routers installed in the routing table?
the distance vector metric
When candidates are offered to the routing table metrics are only considered when?
distance and metric
Which routing protocol by default uses bandwidth and delay to calculate the metric of a route?
EIGRP
What are features?
-Distance vector routing -Hop-count metric -Route time-out timer
Which routing protocol uses hop count as the metric?
RIP (Routing Information Protocol) uses hop count as the metric. It measures the distance to a destination network based on the number of routers (hops) that a packet has to traverse to reach the destination.
