18  Acknowledgements

Grateful acknowledgement is made to the following sources:

Figure 1: Birmingham City University (BCU)

Figure 2: Birmingham City University (BCU)

Figure 3: Birmingham City University (BCU)

Figure 4: Birmingham City University (BCU)

Figure 5: Birmingham City University (BCU)

Figure 6: Birmingham City University (BCU)

Figure 7: Birmingham City University (BCU)

Figure 8: Birmingham City University (BCU)

Figure 9: Birmingham City University (BCU)

Figure 10: Birmingham City University (BCU)

Figure 11: Birmingham City University (BCU)

Figure 12: Birmingham City University (BCU)

Figure 13: Birmingham City University (BCU)

Figure 14: Cisco

Figure 15: Cisco

Figure 16: Jonas Bjork This file is licensed under the Creative Commons Attribution-Share Alike Licence http://creativecommons.org/ licenses/ by-sa/ 2.0/ [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)]

Figure 17: Birmingham City University (BCU)

Figure 18: Birmingham City University (BCU)

Figure 19: Birmingham City University (BCU)

Figure 20: Cisco

Figure 21: Birmingham City University (BCU)

Figure 22: Birmingham City University (BCU)

Figure 23: Birmingham City University (BCU)

Figure 24: Birmingham City University (BCU)

Figure 25: Birmingham City University (BCU)

Figure 26: Cisco NetAcad/Birmingham City University (BCU)

Figure 27: Birmingham City University (BCU)

Figure 28: Birmingham City University (BCU)

Figure 29: Birmingham City University (BCU)

Figure 30: Birmingham City University (BCU)

Figure 31: Birmingham City University (BCU)

Figure 32: Birmingham City University (BCU)

Figure 33: Birmingham City University (BCU)

Figure 34: Birmingham City University (BCU)

Figure 35: Birmingham City University (BCU)

Every effort has been made to contact copyright holders. If any have been inadvertently overlooked the publishers will be pleased to make the necessary arrangements at the first opportunity.