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Wireless networking standards

There are three main wireless networking standards. These standards are 802.11n, 802.11b, 802.11a. 802.11n has wireless waves frequency of 2.4 GHz and 5 GHz, 802.11b - has frequency of 5GHz, 802.11a - has frequency of 320 MHz. Network speeds had increased for wireless communications as well. They got increased from 11 MBs - 54 MBs for 802.11n, to 46 GBs for 802.11a.
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POE injectors

​POE injectors are used to add or inject power to Ethernet cables.
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POE or power over Ethernet

​POE or power over Ethernet can provide both power and network connectivity to remote network devices. POE technology is often used in network cameras, phones and access points. POE simplifies installation of networking devices.
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Firewalls

​Firewalls block incoming network traffic therefore they can be used to prevent unauthorized network traffic and access.
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Patch panels

​Patch panels are used for network cable management. These are intermediate networking devices before network cables go to a network switch. Patch panels are typically can only be found in server rooms.
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Access points

​Access points are network devices that transform wireless signals into wired network signals. Access points can be used to extend wireless signal coverage.
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Managed vs. unmanaged switches

​Are managed switches are basic network switches, where managed switches offer advanced network options such as quality of service, and security, they allow remote connectivity to these. Managed services usually used in larger networks, where unmanaged switches are sufficient for basic network operations.
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