Administrative Distance (AD) is a value that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols. Administrative Distance counts the reliability of a routing protocol.
Table of Contents
Which routing feature has an administrative distance of 120?
RIP
Setting the Administrative Distance for a Route
| Route Source | Default Distance |
|---|---|
| OSPF | 110 |
| IS-IS | 115 |
| RIP | 120 |
| Internal BGP | 200 |
What is the definition of route statement administrative distance?
Administrative Distance (AD) is a value that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols. Administrative Distance counts the reliability of a routing protocol.
What is the best router select path?
A primary function of a router is to determine the best path to use to send packets. To determine the best path, the router searches its routing table for a network address that matches the destination IP address of the packet.
What are the type of routes?
There are four types of routes. These types are connected route, local route, static route, and dynamic route. Automatic routing adds connected routes and local routes to the routing table.
Which route has the lowest administrative distance?
In the event of two protocols reporting the same route, the routing protocol with the lowest administrative distance will win, and its version of the route will be inserted into the RIB….Administrative Distance.
| Route type | Administrative distance |
|---|---|
| Connected interface | 0 |
| Static route | 1 |
| EIGRP summary route | 5 |
| External BGP | 20 |
How do you determine the administrative distance of a route?
You can display the administrative distance of all routes on your router by typing the show ip route command:
- In the case above, the router has only a single route in its routing table learned from a dynamic routing protocols – the EIGRP route.
- Metric.
- RIP has been configured on all routers.
What does an administrative distance of 0 mean?
An administrative distance is a number between 0 and 255, with the lower number being better. The AD of 0 indicates the most trusted route (the directly connected network). The AD of 255 means that the route will not be trusted. Here are the default AD values for a different routing protocols: Connected interface – 0.
How does a router determine where to forward data?
A primary function of a router is to forward packets toward their destination. This is accomplished by using a switching function, which is the process used by a router to accept a packet on one interface and forward it out another interface.
How a router makes forwarding decisions?
Routers can access IP packets carried to them in frames, so they can make forwarding decisions based on the IP destination address they find. The forwarding of packets by routers is referred to as packet switching.
What is a slash 16 network?
The `/16′ means that the first 16 binary digits is the network address, in other words, the `1.2. ‘ part is the the network (remember: each digit represents 8 binary digits). This means any IP address beginning with `1.2. ‘ is part of the network: `1.2. 3.4’ and `1.2.
How many IPS are in a 27?
Subnet Cheat Sheet – 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network References
| CIDR | Subnet mask | # of usable IP addresses |
|---|---|---|
| /27 | 255.255.255.224 | 30 |
| /26 | 255.255.255.192 | 62 |
| /25 | 255.255.255.128 | 126 |
| /24 | 255.255.255.0 | 254 |
What is meant by routing?
Routing is the process of selecting a path for traffic in a network or between or across multiple networks. Broadly, routing is performed in many types of networks, including circuit-switched networks, such as the public switched telephone network (PSTN), and computer networks, such as the Internet.
Which routing network traffic is high?
Binary-routing: a routing scheme for high traffic networks.
What is a metric in routing?
A metric is a value that’s assigned to an IP route for a particular network interface. It identifies the cost that’s associated with using that route. For example, the metric can be valued in terms of link speed, hop count, or time delay.
Is lower administrative distance better?
Administrative distance number is used by routers to find out which route is better (lower number is better).
How do routers route?
In packet-switching networks, such as the Internet, routing selects the paths for Internet Protocol (IP) packets to travel from their origin to their destination. These Internet routing decisions are made by specialized pieces of network hardware called routers.