Library items tagged: IP

This appendix discusses what subnetting is and gives some examples of how IP addresses can be separated into a network part and a host part. It describes a simple college subnet and shows how subnet masks are used to decode IP addresses. The final section covers binary numbers and converting to and from decimal.  
Every organisation that wishes to send and receive e-mail, or gain access to the Internet, needs a globally unique address, known as an IP address. These addresses are numeric and uniquely identify one network interface on a computer. Each address is written as four fields, separated by dots, and each field can be a number ranging from 0 to 255, e.g.
Multipoint Control Units (MCUs) Centralised MCUs are capable of providing Standard Definition (SD) and High Definition (HD) IP based videoconferences. JANET(UK) currently operates 2 Polycom MGC-100TM MCUs and 3 Codian MSE 8000 chassis with SD and HD MCU blades. The equipment is used for both point-to-point and multipoint videoconferences to facilitate IP to IP, IP to ISDN and ISDN to ISDN conferences.
Local Network Set-up
TheJanet Videoconferencing IP infrastructure complies with the International Telecommunications Union Standardisation Sector (ITU-T) H.323 umbrella of protocols for IP videoconferencing. The service consists of three elements:
The JANET Videoconferencing Service (JVCS) provides videoconferencing services to the Janet community within the UK. It consists of centralised equipment, a Service Desk and Booking Service to facilitate videoconferences using both ISDN and IP technologies. The service supports point-to-point (one-to-one) and multipoint videoconferences and provides a bridges to allow conferencing between IP and ISDN systems.