Network+ 1.6 Given a scenario, implement the appropriate wireless technologies and configurations

802.11a

Came out in October 1999. Issues with range and the signal being absorbed. Frequency is 5GHz, speeds up to 54 Mbps.

802.11b

Came out in October 1999. Longer range than 802.11a and less issues with absorption. Issues with frequency conflicts due to the common use of the frequency. Frequency is 2.4 GHz, speeds up to 11 Mbps.

802.11g

Came out in June 2003. Is considered an upgrade to 802.11b. Is backwards compatible with 802.11b. Frequency is 2.4 GHz speeds up to 54 Mbps

802.11n

Came out in June 2009. Is an upgrade to 80211.a, 802.11b, and 802.11g. Is the first to support MIMO (Multiple-Input Multiple-Output). Frequency is 2.4 GHz and/or 5GHz, speeds up to 600 Mbps

80211ac

Came out in January 2014. Less issues with frequency conflicts due to 5 GHz being less common. Has greater speeds due to it having denser signaling modulation. Supports MIMO just like 802.11n. Uses frequency 5GHz speeds up to 7Gbps

GSM (Global System for Mobile Communications)

The global system for mobile communications is a standard developed by the European Telecommunications Standards Institute to describe the protocols for second-generation digital cellular networks used by mobile devices.

TDMA (Time-Division Multiple Access)

Is a channel access method for shared-medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots.

CDMA (Code Division Multiple Access)

Is a channel access method used by various radio communication technologies

2.4 GHz

The 2.4GHz band provides coverage at a longer range but transmits data at slower speeds.

5.0 GHz

The 5 GHz band provides less coverage but transmits data at faster speeds. The range is lower because higher frequencies cannot penetrate solid objects.

Speed and distance requirements

2.4 GHz is better for longer distance and 5 GHz is better for shorter distances. Ensure the frequency being used is the correct one, that nothing is blocking the path, and that there is no interference to be able to send the data at an acceptable speed and distance.

Channel Bandwidth

The rate at which data is exchanged usually measured in bits per second (bps)

Channel Bonding

A 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel

MIMO (Multiple-Input and Multiple-Output)

Allows more than one antenna to be used on clients and access points., allowing devices to transmit and receive simutaneously

MU-MIMO(Multiuser MIMO)

Allows multiple users to use the same channel

Unidirectional

Unidirectional antennas transmit only in one general direction, allowing the full power of the transmission to be focused on a particular area.

Omnidirectional

Most in home and office Wi-Fi antennas are omnidirectional. These antennas send and receive data in 360 degrees and as a result, the signal is available in the full circle

Site Surveys

Is the process of planning and designing a wireless network, for the purpose of providing a wireless solution that will deliver the required wireless coverage.