Properties of the wireless transmission medium - CCNA Routing and Switching

Wireless transmission media allow transmission of binary data by encoding them into electromagnetic signals of the microwave and radio range.

Wireless provides the greatest mobility of all transmission media, so the number of devices that support wireless connectivity is growing every day. As bandwidth increases, wireless connectivity is gaining popularity in corporate networks cisco wireless certified.

The wireless environment has the following features to consider.

Coverage area . Wireless data transmission technologies work well in open spaces. However, some building materials used in the construction of buildings and structures, as well as local conditions, can limit the coverage area.

Interference . Wireless connections are susceptible to interference and may be degraded by common devices such as cordless phones, certain types of fluorescent lights, microwave ovens, and other wireless communications.

Security . You do not need to connect to physical cables to access the wireless environment. Therefore, this environment can be accessed by unauthorized users and devices. Hence, security is a major aspect of wireless administration.

General transmission medium . WLANs operate in half duplex mode, which means that only one device can transmit or receive at a time. The transmission medium is common to all wireless users. The more users simultaneously connect to a WLAN, the less bandwidth each of them has. Half duplex will be discussed later in this chapter.

While the popularity of wireless networking of desktops to the network is growing, copper and fiber remain the most popular physical media.