topics for test internet history and operations (high level) applications - Web, email, chat, ftp, telnet ARPAnet W3C IP address, Domain name URLocator Search Engine keyword thematic HTML html, head, body, title tag attributes color, size, bgcolor, background br,p,hr, image anchor xml xsl - be able to do what we did in the exercise networks architectures/topologies bus, star, ring, hierarchy, network hybrid networks routers, bridges, gateways Internet again domain, ICANN IP address format - 24 bit domain and 8-bit host address mnemonic address top level domain web and mail servers and subdomains client-server relationship token ring protocol CSMA/CD layered communication models (general) OSI Internet 4-layer application transport network link port numbers <-> applicaitons TCP/IP TCP is transfer layer (so is UDP) IP is network layer unreliable connectionless