Digital Signals over Radio Waves

Cable uses a part of RF electromagnetic frequencies. Cable can transmit signals simultaneously in either direction. RF portion used is subdivided for the two paths - Downstream Headend-to-subscriber has 810 MHz of RF bandwidth. - Upstream Subscriber-to-headend has 37 MHz of RF bandwidth. Cable uses a part of RF electromagnetic frequencies. Cable can transmit signals simultaneously in either direction. RF portion used is subdivided for the two paths - Downstream Headend-to-subscriber has 810 MHz...

Example Enterprise Network

A branch office or remote site typically has fewer users, and therefore needs a WAN connection with lower requirements in terms of bandwidth and availability. Remote sites typically connect to the central site and also sometimes connect to some other remote sites. Telecommuters may also require access to remote sites. Remote site traffic can vary, but is typically sporadic. The network designer must determine whether it is more cost-effective to offer either a permanent or on-demand solution....

Cisco SONA Layers

Network Infrastructure Vlrtuallzation Network Infrastructure Vlrtuallzation Intelligent Information Network - Intelligent Information Network - The SONA framework brings forth the notion that the network is the common element that connects and enables all components of the IT infrastructure. The SONA outlines these three layers of the IIN The networked infrastructure layer This is where all the IT resources are interconnected across a converged network foundation. The IT resources include...

Users on a segment share upstream and downstream bandwidth

A headend CMTS communicates with cable modems located in subscriber homes. In addition, a headend incorporates a computer system with databases for providing Internet services to cable subscribers. In a modern HFC network, typically 500 to 2000 active data subscribers are connected to a certain cable network segment, all sharing the upstream and downstream bandwidth. The actual bandwidth for Internet service over a CATV line can be up to 27 Mbps on the download path to the subscriber, and about...

Student Guide

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