Overview: Admin distance is what is used to select the best path when a router has two different paths to the same destination via two different routing protocols. Study Notes: Most routing protocols are not compatible with other protocols. In a network with multiple routing protocols, being able to select the best path between […]
Overview: A routing table consists of routes to destination networks that are learned either statically or dynamically by different routing sources. Study Notes: The routing source populates the routing table Automatically by the router for connected and local routes Statically by an administrator. The administrator statically configures how to get to remote networks. Dynamically […]
Overview: Gateway of last resort is the default route configured on the router Study Notes: Default routes are used to direct packets addressed to networks not explicitly listed in the routing table. Default routes are invaluable in topologies where learning all the more specific networks is not desirable, as in case of stub networks, […]
Overview: The metric is a value produced by the routing protocol’s algorithm. The metric value determines the best path to a destination network within a routing protocol. Study Notes: To determine the metric: RIP uses hop count EIGRP uses K values OSPF uses reference bandwidth Metric is used to compare routes to a destination […]
Overview: Administrative distance is what is used to select the best path when a router has two different paths to the same destination via two different routing protocols. Study Notes: Most routing protocols are not compatible with other protocols. In a network with multiple routing protocols, being able to select the best path between […]
Overview: Routing protocol code identifies by which routing protocol each route was learned. Study Notes: Common routing protocol codes include: C – connected S – static I – IGRP R – RIP B – BGP D – EIGRP EX – EIGRP external O – OSPF And more…
Overview: Next hop identifies the IP address of the next router inline to forward the packet to. Study Notes: Connected networks and Local networks do not have a next hop The first next hop address in the routing table is for the RIP route to network 172.16.2.0/24. The next hop is 209.165.200.226 The next hop […]
Overview: A prefix is simply the network address. A prefix-length is simply a shorthand way to express a network mask using CIDR notation. Study Notes: A network mask may also be called a subnet mask or netmask for short Let’s read a few of the entries in the routing table and determine their network […]
Overview: A prefix is simply the network address. In a routing table, the prefix is the destination network address. A prefix-length is just the shorthand way to express a subnet mask using CIDR notation. If the subnet mask is 255.255.255.0 than the prefix-length is /24. Study Notes: Reading the routing table from top […]
Overview: A routing table consists of entries to networks that are either directly connected, statically configured or dynamically learned. To view a routing table use the “show ip route” command. You will be presented with something like the following: The CCNA exam covers the following routing table components topics. Each topic will explore a different […]