When a router learns that multiple paths are available to a destination network from the same routing protocol which factor is considered by a router to choose the best path to forward a packet?

When a router learns that multiple paths are available to a destination network from the same routing protocol which factor is considered by a router to choose the best path to forward a packet?

Administrative distance – This is the measure of trustworthiness of the source of the route. If a router learns about a destination from more than one routing protocol, administrative distance is compared and the preference is given to the routes with lower administrative distance.

Can more than one dynamic routing protocol be used on a single router?

In most networks, a single dynamic routing protocol is used; however, there are cases where different parts of the net- work can use different routing protocols. Since the early 1980s, several different dynamic routing protocols have emerged.

What is prefix routing?

The routing prefix of an address is written in a form identical to that of the address itself. This is called the network mask, or netmask, of the address. For example, a specification of the most-significant 18 bits of an IPv4 address, 11111111.11111111. 11000000.00000000, is written as 255.255. 192.0.

Why are routers needed in networking group of answer choices?

Why are routers needed in networking? One of the basic functions of a router is to connect different networks. Each interface on a router belongs to a different network. LAN devices can be connected through switches.

What are the three basic ways a router learns about networks?

There are three ways for a router to learn routes:

• Static Routing – This is the method by which an administrator manually adds routes to the routing table of a router.
• Default Routing – This is the method where all routers are configured to send all packets towards a single router.

When would you choose to add a dynamic routing protocol S to a router?

Dynamic routing protocols work well in any type of network consisting of several routers. They are scalable and automatically determine better routes if there is a change in the topology. Although there is more to the configuration of dynamic routing protocols, they are simpler to configure in a large network.

Are all dynamic routing protocols supported on all routers?

The “dynamic” part refers to the protocol’s ability to recalculate and re-route traffic when more optimal paths become available or when links along the most optimal path fail. That said, not all dynamic routing protocols are alike.

How can I use only one path when a router has two equal cost paths?

How can I use only one path when a router has two equal cost paths? A. Configure the bandwidth value on the interfaces to default, and increase the delay on the backup interface so that the router does not see two equal cost paths.

Which parameter does the router use to select the best path?

If there are two or more possible routes to the same destination, the metric is used to decide which route appears on the routing table. The lower the metric, the better the route.

What is longest prefix in routing?

The Longest Match Routing Rule is an algorithm used by IP routers to select an entry from a routing table. The router uses the longest (prefix) match to determine the egress (outbound) interface and the address of the next device to which to send a packet.

What is LPM in networking?

Network Routers find most defined path for an arriving packet by the destination address in the packet using longest prefix matching (LPM) with Routing table entries. It also eliminates the priority encoder needed to find the longest prefix match in conventional techniques .

When to use administrative distance in routing protocol?

If a router learns about a destination from more than one routing protocol, administrative distance is compared and the preference is given to the routes with lower administrative distance. In other words, it is the believability of the source of the route.

What kind of routing does a router do?

Routers are primarily responsible for logical addressing and best path selection. They forward packets between different subnets, VLANs and across the WAN. They build a routing table with routes comprised of network prefix, metric and next hop address.

How does a Cisco router choose which route to use?

One of the intriguing aspects of Cisco routers, especially for those new to routing, is how the router chooses which route is the best among those presented by routing protocols, manual configuration, and various other means.

When is the longest match preferred in routing?

When there are multiple routes with different prefix lengths to a destination, then the longest match is always preferred regardless of the routing protocol used. For example, if the routing table contains the prefixes: