Physical Structure , Coax, Fiber, Wireless, Hub, Repeaters, Frames, Ethernet, PPP, Switch, Bridge., Packets, IP, ICMP, IPSec, IGMP, End to End connections, TCP, UDP, Synch and send to port, API’s, Sockets, WinSock, Syntax layer, SSL, SSH, IMAP, FTP, MPEG, JPEG, End user layout, HTTP, FTP, IRC, SSH, DNS.

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