Voice over Internet Protocol feature allows users to make voice calls by making use of a broadband internet connection. The Voice engineer is setting up a Cisco 2951 Integrated Services Router with Cisco Unified Communications Manager Express, which happens to fall under broadband internet connection and hence the command the engineer will enter must be a voice service voip.
A hub, also called a network hub, is a common connection point for devices in a network. Hubs are devices commonly used to connect segments of a LAN. The hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.
