Question

You are the networking expert for a large company. First, your company has one small branch office that is connected to an Internet Service Provider via one router. This branch office is not expected to grow or change in the next three years. Second, your company has a larger office building with three routers to interconnect within the building and also to connect to an Internet Service Provider. This larger office building is not expected to change in the next three years. Finally, your company has a campus of buildings for its main headquarters. You have a rapidly changing and growing network at this headquarters as buildings are added, departments relocated, and routers are added. Your semi-technical boss says, "I hear about static, default, and dynamic routing, but it sounds confusing. Let's just make everything the same and use dynamic routing everywhere. I hear that is the easiest." You would like more flexibility and efficiency as you connect your networks. Tell your boss why it might be best to use different routing choices at the different locations. Summarize your recommendations in a snappy, one page memo. Your boss isn't too technical, so keep it fairly simple to understand, but be sure to state your case that different routing choices at the different locations is the best way to proceed.

Answer 1

As we see in the question, the small branch office is very small with only one router, and the main office building not expected to change in the next 3 years. But when we see at the campus of building there is rapid growth and network is being increased and growing and many new routers are also added. As it's a small and growing network RIP routing is the most suggestible one...

What is RIP routing? How does it work?

Let's figure it out....

Routing Information Protocol(RIP) is a routing protocol used to route the data to other networks. This protocol is mainly used for small and medium-sized networks. A router configured with RIP transfers the contents of its routing table to each of its neighboring routers every 30 seconds. If that neighbor router is dismissed or removed from the network then it doesn't get any information right.

Then this router waits for 180 seconds and later for 120 secs and then it removes that removed router from the routing table of it. All info regarding routers will happen for every 30 secs by exchanging between them. There are 2 versions for RIP. RIP is a dynamic routing protocol.

The routing metric used by RIP is Hop count. It chooses the route to a destination by this metric only. The less the hop count the best the route to reach it. Here HOP means routers. RIP v1 is classful RIP v2 is a classless routing protocol.

There are many other routing protocols like eigrp static etc... but we have to use routing protocol; according to the requirement. It's not at all a good way to use RIP at every location. Use different protocols according to the network.

By using RIP at this building helps us in a great way because new routers are adding and updating in this location. growth is also there here. So we need a dynamic routing protocol and this RIP is best and gives fast routing as hops count is less within the building. At other locations, there is no rapid growth and no adding of routers.

So this is the reason a rapidly growing place by adding routers most frequently needs a dynamic routing protocol. So installed RIP and this same cant be used in every location.

I have tried to explain it in very simple language and I hope that I have answered your question satisfactorily. Leave doubts in the comment section if any.