A bank which offers its full range of services from only one office unit bank?

Answer 1

One would call such a bank as a universal Bank. However, what all is included in 'full range' could be subject to individual interpretation. Only service which in my view a bank must offer to be able to referred to as a bank is a saving service. There are specialized term lending institutions, which may not offer any retail banking service. There are investment banks or merchant banks which offer merchant banking services like underwriting and arranging debt and equity issuance, valuation and merger and acquisitions etc. With the recent merger between investment bank and retail banks in the USA what we have now are more of universal banks. Typically, even in a universal bank, different offices or branches would offer specialized services, rather than any one branch being able to offer all such services.