An Introduction to Computer Network Monitoring and Performance A.C. Davenhall & M.J. Leese December 2005 Version 1 Contact Details A.C. Davenhall, National e-Science Centre, M.J. Leese, CCLRC Daresbury Laboratory. Correspondence about this document should be sent to: A.C. Davenhall, National e-Science Centre, 15, South College Street, Edinburgh, EH8 9AA, UK. E-mail:
[email protected] Purpose and Scope This document is an introduction to computer networks and to ways of obtaining good performance from them. It covers: • the basics of computer networks, • how to monitor their performance, • simple techniques to improve their performance. It also describes some of the common protocols used to transfer files across networks. These topics are all large and complex subjects, and the document is only an introduction to them. However, references to more advanced and specialised sources of information are included. Target Audience The document is aimed at people who are not network experts, but who need to use networks and to obtain good performance from them. No previous experience of computer networking is assumed. People who are already knowledgeable about computer networks are less likely to find the introductory sections useful, but might still obtain some benefit from the later sections which discuss how to improve network performance. Some very basic knowledge of Unix is assumed in places, but is not necessary for most of the document. Revision History 1. 22 December 2005: Version 1. First released version. Expanded from material in the report Computer Networks for the AVO by A.C. Davenhall, A. Lawrence, E.T.W.