View the series http://www.youtube.com/watch?v=aBOzFa6ioLw on VLANs and trunks: a) Why were work done to provide VLAN capability on switches, when the alternative is to merely create another LAN, using another set of swithes? (4 marks) b) Explain the differences between (i) access ports and (ii) trunks. Refer to the IEEE 802.1Q VLAN standard. (2 marks) c) Give a concise description, with graphic illustration, of an IEEE 802.1Q field added to an Ethernet packet. (2 marks).