packet sniffers and protocol decoders used by isps

hi, this topic seems being at least semi-operational to me :) i'd like to make an idea of which sniffers and (the more important part) decoders are included in the arsenal of engineering tools used by network engineers at various isp sizes practical experience would be the most valuable information please feel free to reply privately if you feel this does not fit the list topics thanks much -- Tomas Daniska systems engineer Tronet Computer Networks Plynarenska 5, 829 75 Bratislava, Slovakia tel: +421 2 58224111, fax: +421 2 58224199 A transistor protected by a fast-acting fuse will protect the fuse by blowing first.