Page 86 - DCAP311_DCAP607_WIRELESS_NETWORKS

Wireless Networks

Notes An Ethernet connection uses a standard interface known as a RJ45 connector. RJ stands for
registered jack. The figure 5.3 shows an Ethernet cable with a RJ45 connector.
Figure 5.3: Ethernet Cable using a RJ45 Connector

Source: http://education-portal.com/academy/lesson/network-interface-card-nic-types-function-definition.html
This cable plugs into the Ethernet connection of a computer. Smalls LED lights built into the
connection will show that a connection is active and whether data is being transferred.
While most desktop computers rely on a wired connection, mobile computing devices such as
laptops, tablets and smart phones use a wireless connection. The most widely used system for
wireless connections is WiFi, which relies on radio signals.

Most laptop computers have both an Ethernet and a WiFi connection, while smaller devices
typically only have a WiFi connection. The NIC controls both types of connections, so whether you
use an Ethernet or WiFi connection, you can use your computer for the same tasks independent
of the type of connection. Wireless connections tend to be slower and are sometimes less secure,
but, in a typical network, the two connections are designed to work seamlessly with each other.

Self-assessment

Fill in the blanks:
1. A ............................... has an electronic visual display, enabling it to include a web browser
2. The ............................... is a space-based satellite navigation system that provides location
and time information in all weather conditions,

3. Wireless ............................... nodes comprises a variety of low power, battery-operated
wireless data acquisition devices to which different sensors may be directly connected.
4. A computer uses a network interface card (NIC) to become part of a ...............................

5. The most widely used network connection for personal computers is an ...............................
connection.

5.3 USB Adapters

Most personal computers had a built-in D-sub serial RS232 port, also referred to as a COM port,
which could be used for connecting the computer to most types of serial RS232 devices. By the

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