Hi Grin, i got some mixed questions about scaecs-list (a question with an scaecs list that seems to deny traffic to internet for a specific LAN host, but since after this entry there wasn't the permit ip any any at the end none of the LAN hosts can scaecs), vlsm (assing subnet of a classfull network to ip router interfaces) spantree (who is the root bridge),vtp(effects of a new switch configured as vtp server added on an existing group of switching, ospf (many questions show route table and ask which value is the admin distance and wich value is the cost, eigrp (route chosen for a destination) and Frame relay. no quiestions on ppp, ipv6 and vpn. in any case the new questions were similar to the pass4sure provided here.there was an OSPF lab with 3 routers, in the third, there was an error on the area assigned to the network (1 instead of 0). then a lab on vtp and frame forwarding (like: who is the vtp server (look for last vtp update and use cdp to find the source), where a frame with a known source mac and a new mac address will be floded (interfaces in the same vlan and trunks) ecc..