Old Army is a large retail store chain operating about 1,000 stores across the U

Question

Old Army is a large retail store chain operating about 1,000 stores across the United States and Canada. Each store is connected into the Old Army data network, which is used primarily for batch data transmissions. At the end of each day, each store transmits sales, inventory, and payroll information to the corporate head office in Atlanta. The network also supports email traffic, but its use is restricted to department managers and above. Because most traffic is sent to and from the Atlanta headquarters, the network is organized in a hub and spoke design. The Atlanta office is connected to 20 regional data centers, and each regional center is in turn connected to the 30–70 stores in its region. Network volumes have been growing, but at a fairly predictable rate, as the number of stores and overall sales volume increase. Old Army currently uses RIP as its routing protocol but is considering moving to OSPF. Should it stay with RIP or move to OSPF? Why?

Explanation / Answer

Answer)

It should start using the OSPF as OSPF is defined as a link state technology which in turn uses the Dijkstra algorithm so as to compute the routing informations.

This helps in as it gives a faster convergence and also provides support for VLSM.

There are no reachability limitations in case of OSPF where as for RIP it has 15 hops.

RIP on using the hop for any routing decision leads to many problems where as the OSPF uses the cost metric so as to choose the best path.

And also OSPF is a multicasted link state update which helps to send the updates when the network changes.

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