CompTIA Network+ certification course sum up. Oriented for cybersecurity later courses.
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Client
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end-user access
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Server
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provides resources to network
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Hub
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connects devices - rebroadcast data
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Switch
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idem but uses selective adressing (IP/MAC)
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Wireless Access Point
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(WAP) - wireless hub
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Media
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connecting media (cables, waves, electricity, ...)
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WAN Link
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DSL, Cable, leased lines, satellite, cellular, MW, ...
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can be
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physical (cabling) or logical (traffic flow)
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Bus
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backbone cable, old, single collision domain
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Ring
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circular loop, singular direction
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token ring = devices wait their turn
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FDDI (fiber) = 2-counter rotating, redundancy
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Star
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connected to central device, SPOF!
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Hub & Spoke
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Star topology with WAN i.o. LAN (hubs)
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Full-Mesh
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rendundant, everyone is connected, efficient, very expensive
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Partial-Mesh
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hybrid of Full-Mesh and Hub&Spoke
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Infrastructure Mode
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most common, cenralized mgmt, uses wireless securtiy control
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Ad Hoc
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P2P connections, no routers
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Wireless Mesh Topology
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Different type of nodes or devices, client-routers-gatways
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Client/Server
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Def
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uses servers to provide access to files, printers, etc
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+
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centralized, easier mgmt, scalable
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-
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high cost, dedicated resources, network operating system
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Peer-to-Peer
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Def
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Peers share resources directly to others
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+
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lower cost, no dedicated resource, no specialized system
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-
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decentralized mgmt, inefficent for large NW, poor scalability
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PAN
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Personnal
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bluetooth, cellphone, usb drive, watch
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LAN
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Local
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limited distance, ethernet (802.3), WIFI (802.11),
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CAN
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Campus
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connects several buildings, camps, MIL bases, schools
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MAN
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Metropolitan
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up to 25-mile radius like city departments, community over a region
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WAN
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Wide
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across country, world, uing leased lines or VPN
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802.11 WIFI
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operates infrastructure or ad-hoc
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Bluetooth
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low energy, mesh network, pairing sys
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RFID
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electromagnetic fields, ie badge reader
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NFC
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RFID but 4cm range, more precise
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IR Infrared
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in line-of-sight
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Z-wave
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short range, low-latency data transfer for home automation
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Ant+
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sensor data for remote control systems
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