What are the most advantageous components of corporate network administration, in your opinion?

Given that Valley Enterprises opted to implement Voice over Internet Protocol (VoIP) servicein its Phoenix, Arizona, service area. The company has 15 locations in the Phoenix area, allwith local area networks and all with secure Wi-Fi connections. The company’s current phonesystem was designed and implemented in the 1950s, when Valley operated in three locations.As more locations were added, standard telecommunications solutions were implemented,with little thought devoted to compatibility. Over the years, phone services were added asnew buildings and facilities arose. Valley CEO Doug Wilson heard of VoIP at a trade showand contacted TMR Telecommunications Consultants, requesting a bid. TMR spent a weekwith the CIO of Valley Enterprises, gathering data, and submitted a bid for $50,000 in late2007. The project was to be started by March 2008 and completed by January 2009. The bidwas accepted.TMR started the project in March 2008. In late July 2008, TMR was bought out by…

If you were to name three items that every given network absolutely needed to operate efficiently, what would they be? Why don't you just give me a quick summary of one of them in your own words?

Explain the word "network," as well as its pros and disadvantages.