Hi\n\nI'm trying to visualise the Cisco hierarchy of\naccess-distribution-core.\n\nSo far, I understand that the access layer is where the users are\nconnected to (e.g. 2960 switches), the distribution is where ACLS's,\nVLAN routing etc takes places (e.g 3750 switches) and the core layer is\nsimply for fast thoroughput of data (e.g. Cisco 5000 switch).\n\nAs below;\n\n 5000\n3750 3750\n I I I I\n2960-2960-2960-2960\n\nWhat I don't understand then is why do Core switches such as the 4000.\n5000, and 6000 Cat switches have so many ports? Surely it should be the\naccess layer switches with most ports, then the distribution and\nfinally the core with the least (as in the diagram above, since the\ncore switch there only connects the two 3750's together).\n\nTo help me, I've built a little home lab with three 2950 switches, a\n2620 router (intervlan routing), and an old 5000 switch. Would the\noptimum method be for all to be connected to the 5000 switches ports,\nas below\n\n5000\n2950 2950 2950 2620\n\nor should it be\n\n5000\n2620\n2950 2950 2950\n\nVery confused, and could appreciate some advise from others!\n\nThanks!