I: Covers IPv4 and IPv6 protocols, addressing and subnetting; Overview on switching and routing technologies; basic firewall principles and NAT translation. Network topologies and the principles of the data network stack (OSI and IP network reference models)
II : Basic overview of various LAN/WAN technologies; basic cisco switch/router configuration (industry standard tech); basic firewall implementation technologies (Checkpoint, rule contruction and syntax)
I can see the point of addressing the protocols, addressing and subnetting, and switching/routing technologies. Basic firewall principles and NAT Translation is a must, but how important is the OSI model to troubleshooting a network problem? I know this sounds like a stupid question, but I worked at several small to medium size companies and never once did the OSI model ever come up when it came time to troubleshoot the network (except maybe in the abstract).