select two backbone configurations and discuss which one you think is the better option for networks of today. Indicate why you think that planning an enterprise-level backbone can be such a challenging process.

I think before going into details, we should understand what is backbone. After a lot of research, I came up this definition; a backbone is a means of connecting two or more LANs. It provides a transmission channel for packets being transmitted from one LAN to another. After connection to a backbone, a LAN may remain distinct or be merged with another. Backbone networks can be applied to a single building environment as well as to campus environments, where the backbone is used to connect LANs in different buildings.

Parallel backbone: I think parallel back is the best worth it for any company. The additional cost of setting up a parallel backbone can be well worth the money. The design of this type of backbone consists of using two cables routed between the routers and switches. While there are additional initial costs of installing a parallel backbone, the benefits can quickly outweigh these costs.
However if company wants to save some money, they can use distribute network. It consists of a number of connectivity devices connected to a series of central connectivity devices, such as hubs, switches, or routers, in a hierarchy. This kind of topology allows for simple expansion and limited capital outlay for growth, because more layers of devices can be added to existing layers The enterprise network is challenging because it rapidly changing as new applications and architectures, including Linux, computing clusters, voice over IP applications, become central to the business. Moreover, work flow enhancements and collaboration tools are making it easier for employees to work together efficiently

One disadvantage to using wireless NICs is that