A network generally means a whole range of interconnected things .In modern society " to network " is fashionable and is a way of people forming a group and socially interacting with each other . It is becoming increasingly popular in the business world as new contacts and leads are sourced as a way of attracting potential clients and motivating  sales and facilitating business transactions.

corner the market

A store can mean a  collection of saved items or a large place where  items are stored and can be purchased .

a stockpile

Network store is a combination of the two with a large range of networking tools and equipment on offer in the one place.