| Popis: |
Today’s communication network deployment is driven by the requirement to send, receive, hand off, and deliver voice, video, and data communications from one end-user to another. Current deployment strategies result in end-to-end networks composed of the interconnection of networks each of which can be classified as falling into one of three main categories of network: core, metropolitan and access network. Each component network of the end-to-end communication network performs different roles. Nowadays, the increase in the number and size of access networks is the biggest contributor to the rapid expansion of communication networks that transport information such as voice, video and data from one end-user to another one via wired, wireless, or converged wired and wireless technologies. Such services are commonly marketed collectively as a triple play service, a term which typically refers to the provision of high-speed Internet access, cable television, and telephone services over a single broadband connection. The metropolitan networks perform a key role in tripleplay service provision in delivering the service traffic to a multiplicity of access networks that provide service coverage across a clearly defined geographical area such as a city over fiber or wireless technologies infrastructure. The core networks or long haul networks are those parts of the end-to-end communication network that interconnect the metropolitan area networks. The core network infrastructure includes optical routers, switches, multiplexers and demultiplexers, used to deliver triple play service traffic to the metropolitan networks and route traffic from one metropolitan network to another. |
