Table of Contents
- 1 How a router determines the path to send its packets?
- 2 Which ways can routers learn paths to destinations?
- 3 Which process do routers use to select the best path when multiple route possibilities are available?
- 4 How do routers learn about remote networks?
- 5 How a router uses the addressing field in an IP header to determine where to forward a packet?
How a router determines the path to send its packets?
When a router receives a packet, the router checks its routing table to determine if the destination address is for a system on one of it’s attached networks or if the message must be forwarded through another router. It then sends the message to the next system in the path to the destination.
How does a router determine which destination to use in a routing table quizlet?
Routers use the routing table to determine where to forward packets. the destination ip address in the packet determines the packet destination. they compare this address with their routing table. the result is a decision about which outgoing interface to use to send the packet out of the router.
Which ways can routers learn paths to destinations?
A router learns about networks that can be reached from its interface thanks to the switches, which themselves learn what computers are connected to each port. And once it learns, it uses the network layer to determine the best route to a destination by using IP.
Which attribute does a router use to select the best path when two or more different routes to the same destination exist from two different routing protocols?
Administrative distance is the feature used by routers to select the best path when there are two or more different routes to the same destination from different routing protocols. Administrative distance defines the reliability of a routing protocol.
Which process do routers use to select the best path when multiple route possibilities are available?
routing protocol
Whenever multiple paths to the same network exist, each path uses a different exit interface on the router to reach that network. The best path is selected by a routing protocol based on the value or metric it uses to determine the distance to reach a network.
What are some examples of routing metrics that can be used to determine the best path for a network?
Router metrics can contain any number of values that help the router determine the best route among multiple routes to a destination. A router metric typically based on information like path length, bandwidth, load, hop count, path cost, delay, MTU, reliability and communications cost.
How do routers learn about remote networks?
A router can learn about remote networks in one of two ways: Manually – Remote networks are manually entered into the route table using static routes. Dynamically – Remote routes are automatically learned using a dynamic routing protocol.
How static routing selects the best paths in sending packets?
Table 1-5 Default Administrative Distances
| Route Source | Administrative Distance |
|---|---|
| External BGP | 20 |
| Internal EIGRP | 90 |
| IGRP | 100 |
| OSPF | 110 |
How a router uses the addressing field in an IP header to determine where to forward a packet?
The router uses the information in the IP header to decide whether and where to forward each received packet, and which network interface to use to send the packet. Most packets are forwarded based on the packet’s IP destination address, along with routing information held within the router in a routing table.