a single channel architecture is best suited for which of the following situations course hero

What is single channel architecture?

What are the advantages of single channel?

What is zero handoff time?

Is it better to have more than one AP in a single space?

Can APs change channels?

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What is single channel architecture?

Single-channel architecture is based on a principle of "virtual cells". All APs joined to a virtual cell use the same wireless channel and identify themselves with the same basic service set identifier (BSSID, i.e. a MAC address ). The APs in a cell are managed by a centralized Wireless LAN controller (WLC) that coordinates the APs such that APs/transmissions do not interfere with one another. From a client's point of view, a virtual cell appears as a single AP.

What are the advantages of single channel?

Benefits. The biggest advantage of a single-channel architecture is that there is a zero handoff time for roaming clients. In multiple-channel architecture, as a client device travels around the physical location of the network, it will change which AP it is associated with.

What is zero handoff time?

With a zero handoff time, there is no interruption to the client, which is ideal when a client is utilizing voice or video applications and does not have bandwidth in reserve to deal with the re-authentication process.

Is it better to have more than one AP in a single space?

Another point to consider is that with single-channel architecture, as with wireless communications generally, increasing AP density is not always better than having fewer APs placed further apart. Placing more than one AP in a single space, a classroom for instance, will not increase the available bandwidth for clients.

Can APs change channels?

Also, since every AP transmit on the same channel, APs cannot change channel to avoid external interference. Thus, in the event of external interference, the client throughput would suffer. While the controller's settings could be changed such that all APs use a different channel, but that manual configuration would negate ...

How many channels can be used in the ISM band?

While the ISM band allows the use of 11 channels (in the U.S.) with three nonoverlapping channels as shown above, the UNII band allows the use of 24 nonoverlapping channels. It is still good practice to allow a two-channel separation between cells as an added safeguard.

What is SCA in a network?

An SCA consists of a single channel and a single BSSID (AP MAC address) that are used for the entire network. This is possible because of the use of multiple, lightweight APs that are actively controlled by a central WLAN controller. All communication occurs on a single channel, requiring continuous traffic management.

What is SCA in wireless?

SCA systems are, however, well-suited to latency sensitive applications such as voice and video delivery. Another upside of a single channel system is that the owner has complete control of the network. However, most wireless management systems also provide a high level of control, without the obvious modes of failure.

Why are SCA systems not prevalent?

SCA systems are not prevalent due to the higher cost of equipment, configuration, and management. Having a single point of failure at the controller also makes these systems unsuitable for mission-critical applications such as process control. The loss of the central controller essentially takes down the network.

What are the advantages of SCA?

The advantages to an SCA include co-channel interference being eliminated; latency due to the reassociation inherent in roaming between BSSIDs is greatly reduced; and the reassociation and reauthorization process is not required. Also, the WLAN controller, instead of the roaming device, in an SCA network controls roaming.

What is single channel architecture?

Single-channel architecture is based on a principle of "virtual cells". All APs joined to a virtual cell use the same wireless channel and identify themselves with the same basic service set identifier (BSSID, i.e. a MAC address ). The APs in a cell are managed by a centralized Wireless LAN controller (WLC) that coordinates the APs such that APs/transmissions do not interfere with one another. From a client's point of view, a virtual cell appears as a single AP.

What are the advantages of single channel?

Benefits. The biggest advantage of a single-channel architecture is that there is a zero handoff time for roaming clients. In multiple-channel architecture, as a client device travels around the physical location of the network, it will change which AP it is associated with.

What is zero handoff time?

With a zero handoff time, there is no interruption to the client, which is ideal when a client is utilizing voice or video applications and does not have bandwidth in reserve to deal with the re-authentication process.

Is it better to have more than one AP in a single space?

Another point to consider is that with single-channel architecture, as with wireless communications generally, increasing AP density is not always better than having fewer APs placed further apart. Placing more than one AP in a single space, a classroom for instance, will not increase the available bandwidth for clients.

Can APs change channels?

Also, since every AP transmit on the same channel, APs cannot change channel to avoid external interference. Thus, in the event of external interference, the client throughput would suffer. While the controller's settings could be changed such that all APs use a different channel, but that manual configuration would negate ...