New York--Zmedia.com, a provider of Internet marketing services, was one of the top 50 most trafficked sites in October, according to the measurement service Jupiter Media Metrix. The company entered at No. 43 of the top 50 Web sites, following alliance deals with such popular portals as Yahoo.com and Geocities. B-to-b content company CNET Networks Digital showed a 62% spike in traffic from the previous month, driving that site to the No. 9 position. The top five sites were AOL, Yahoo!, Microsoft, Lycos and Excite, according to Media Metrix, New York.