1/27
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
Network Devices
Different devices and components in a network have different roles; some functions are combined, like wireless router/switch/firewall.
Router
Routes traffic between IP subnets by making forwarding decisions based on IP address.
Layer 3 Switch
A switch that includes routing functionality; essentially a router inside a switch.
Router Connections
Connects diverse network types like LAN, WAN, copper, and fiber.
Switch
A hardware bridge that forwards traffic based on MAC (data link) address using an ASIC.
Multilayer Switch
A switch that includes Layer 3 routing capabilities.
Unmanaged Switch
A plug-and-play switch with little to no configuration options; no VLANs or management protocols.
Managed Switch
Supports VLANs, traffic prioritization, STP, port mirroring, and SNMP-based management.
Access Point
A bridge that extends a wired network to a wireless one by forwarding traffic based on MAC address.
Wireless Router
A combination device that includes router and access point functionality.
Patch Panel
A passive device where cables are permanently punched down and connected to patch cables.
Firewall
Filters traffic by port number (TCP/UDP), can proxy/encrypt traffic, and typically operates at OSI Layer 3.
Power over Ethernet (PoE)
Provides power and network over a single Ethernet cable.
Endspan PoE
PoE built into the switch itself.
Midspan PoE
PoE power is added through an in-line power injector.
PoE (802.3af)
Provides 15.4W of DC power with 350 mA max current.
PoE+ (802.3at)
Provides 25.5W of DC power with 600 mA max current.
PoE++ (802.3bt Type 3 & 4)
Provides up to 51W or 71.3W depending on type, supports 10GBASE-T.
Hub
A multi-port repeater that repeats traffic to all ports; operates half-duplex and is largely obsolete.
Cable Modem
Uses DOCSIS to provide high-speed broadband internet over cable; supports data, voice, and video.
DSL Modem
Uses telephone lines (ADSL); asymmetric download/upload speeds with distance limits from CO.
ONT (Optical Network Terminal)
Connects ISP fiber network to customer's copper network; serves as the demarcation point.
Demarcation Point (Demarc)
Physical boundary where the ISP's network ends and the customer’s network begins.
NIC (Network Interface Card)
Fundamental hardware that connects a device to the network; specific to Ethernet, WAN, or wireless.
Software Defined Networking (SDN)
Separates network functionality into planes (data, control, management) for centralized management.
SDN Infrastructure Layer (Data Plane)
Processes and forwards frames/packets; performs NAT, encryption, etc.
SDN Control Layer (Control Plane)
Manages routing/session/NAT tables and dynamic updates.
SDN Application Layer (Management Plane)
Used to configure and manage the network through SSH, web browser, or API.