Structure of Networks
OSI model (for the table, understand don't memorize)
List of network protocols (understand, don't memorize)
Routing (top only)
Ethernet (top and deeper than usual skim of the rest)
Institute of Electrical and Electronics Engineers (top only)
IEEE 802.11
TCP/IP (top and skim the rest)
IPv4 (top only)
IPv6

Networks of various types
Local area network
Wireless LAN
Wi-Fi
Comparing WLAN and LAN
Mesh networking
Wireless mesh network
Wireless sensor networks
Mobile ad-hoc network
Metropolitan area network
Wireless MAN
Wide area network
Personal area network
Bluetooth (skip Technical information and skim Security and Bluetooth profiles sections but read all the rest)
RFID

Phones
Last mile
Local loop
Wireless local loop
Cellular network
Global system for mobile communications
2G
2.5G
3G (top only)

Computers and their pieces
Central processing unit (top only)
Microprocessor (top only)
Microcontroller (top only)
BASIC Stamp
Random access memory (top only)
Secondary storage