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Version: 4 Issued: January 2024 Reference: GEN-DOC-006 Owner: John Chapman Last Reviewed Date: 21/01/2025
Version: 5 Issued: January 2024 Reference: GEN-DOC-007 Owner: John Chapman  Last Reviewed Date: 21/1/2025 A number of Janet connected organisations have asked whether they are permitted to allocate email addresses under their ‘organisation.ac.uk’ domain to former students (alumni). This factsheet discusses the issues this is likely to raise.
Version: 5 Issued: January 2024 Reference: GEN-DOC-008  Owner: John Chapman Last Reviewed Date: 21/01/2025
The following notes provide some hints and tips about the use of e-mail. They cover the content and format of e-mails, sending and receiving attachments, courtesy and general housekeeping tips. Common Courtesy Always consider the feelings of recipients when composing e-mails. Good manners are also important when dealing with incoming e-mail. E-mail should be read at least once a day if possible. If users are away for long periods, try to let people know.
PB/INFO/016 Most computer users will have been very grateful for the existence of backups. Although they are often seen as a way to recover files lost due to typing errors or misplaced mouse clicks there are other reasons to make and keep secure copies of files. However each of these purposes creates different requirements for the backup and recovery system, so it is important to be clear which purpose is involved and choose an appropriate backup strategy and technology to deliver it.
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.  
Janet is responsible for the overall management of Janet. However, there are also other organisations that are engaged in running all or part of the network, or providing support. The following paragraphs describe how these bodies are related.
The Janet backbone The Janet network is based around a high-speed, high bandwidth backbone. The latest version of the backbone, which was designed to provide a high level of reliability as well as substantially increased capacity, came into full service in early 2007. It currently runs at 100Gbit/s. A PDF map of the present Janet backbone is provided here and a schematic is available here.
1. The Structure of Janet 2. Managing and Supporting Janet 3. Record of Network Information and Contacts PDF available 4. Examples of Fault Reporting Letters Example of a Fault Reporting Letter for Janet-connected Organisations Fault Reporting Letter for Sites Subscribing to the Managed Router Service 5. No longer used 6. No longer used
Janet manages Janet in accordance with policies set by JISC. Janet Network Connection Policy   The Janet Network Connection Policy defines explicitly who can connect to Janet.