20 Wireless Communication Interview Questions and Answers

Wireless Communication is the transfer of information between two or more points that are not physically connected. This can be done through a variety of mediums such as radio waves, microwaves, infrared light, and visible light. When interviewing for a position that requires knowledge of wireless communication, be prepared to answer questions about the various types of wireless communication, the advantages and disadvantages of each, and how to choose the best medium for a given situation. This article will review some common questions you may encounter during your job interview.

Wireless Communication Interview Questions and Answers

Here are 20 commonly asked Wireless Communication interview questions and answers to prepare you for your interview:

1. What is the difference between a wireless network and mobile computing?

A wireless network is a network that uses wireless technologies to connect devices. Mobile computing, on the other hand, is the use of portable computing devices, such as laptops, smartphones, and tablets, to access information and resources.

2. Can you explain what a Wireless Personal Area Network (WPAN) is?

A Wireless Personal Area Network (WPAN) is a short-range, low-power wireless network used to connect devices in close proximity to each other. WPANs are often used to connect devices like keyboards, mice, and printers to computers or other devices.

3. How does Wireless Local Area Network (WLAN) differ from WPAN?

WLAN is a type of wireless network that allows devices to connect to each other over a short range without the need for wires or cables. WPAN, on the other hand, is a type of wireless network that is designed for use over a much shorter range, such as within a single room or building.

4. Is it possible to use wired devices on a WLAN? If yes, then how?

Yes, it is possible to use wired devices on a WLAN. This can be accomplished by connecting the wired device to a wireless router or access point. The wireless router or access point will then act as a bridge between the wired device and the wireless network.

5. Why do we need local area networks in our organizations?

Local area networks (LANs) are important for businesses and organizations because they provide a way for employees to communicate and share resources within a limited geographical area. For example, a LAN can be used to connect computers in a single office so that employees can share files and printers. A LAN can also be used to connect to the Internet, which allows employees to access online resources and communicate with others outside of the organization.

6. What are some of the limitations of using WLANs?

One of the main limitations of using WLANs is their range. WLANs typically have a shorter range than other types of wireless networks, which can make it difficult to cover large areas with a single WLAN. Additionally, WLANs can be more susceptible to interference from other devices and environmental factors, which can impact their performance.

7. What is WiFi? How does it work?

WiFi is a wireless networking technology that allows devices to connect to the internet without the need for physical cables. WiFi works by using radio waves to transmit data between devices.

8. What’s the frequency range for microwave communication used by most modern-day WLAN systems?

The frequency range for microwave communication used by most modern-day WLAN systems is 2.4 GHz to 5 GHz.

9. What types of media access methods can be used with WLANs? Which one would you prefer and why?

The two types of media access methods that can be used with WLANs are contention-based and contention-free. Contention-based means that multiple devices share the same channel and contend for access. Contention-free means that each device has its own dedicated channel. I would prefer the latter because it would eliminate the need to constantly compete for access to the channel, which would in turn improve communication efficiency.

10. Do all wireless access points support multihop networking? If not, which ones do?

No, not all wireless access points support multihop networking. In order for an access point to support multihop networking, it needs to be able to forward packets from one client to another. Many consumer-grade access points are not able to do this, as they are designed to only support a single client. However, there are some commercial-grade access points that do support multihop networking.

11. What kind of hardware do I need to set up my own wireless LAN at home?

In order to set up a wireless LAN at home, you will need a wireless router and a modem. You will also need a computer that is equipped with a wireless network card.

12. What is a wireless mesh network? How is it different from other types of WLAN?

A wireless mesh network (WMN) is a type of wireless network that consists of radio nodes organized in a mesh topology. A mesh topology is a type of network topology in which each node is connected to one or more other nodes in the network such that there is at least one path between any two nodes. This is in contrast to other types of WLANs, which typically have a star or bus topology.

13. Where are wireless mesh networks typically used?

Wireless mesh networks are often used in large-scale deployments where it is not feasible to run wired infrastructure. They are also used in situations where wired infrastructure is not available or would be too expensive to deploy, such as in rural areas. Additionally, mesh networks can be used to provide redundancy in case of failure of a primary network.

14. What type of antennae should be used if you want a long-range WLAN connection?

If you want a long-range WLAN connection, you should use an antenna with a high gain.

15. Are there any standards that define how a wireless network should function? If so, then name them.

There are several standards that define how a wireless network should function. The most common are the 802.11 standards from the Institute of Electrical and Electronics Engineers (IEEE). These standards define the physical and logical layers of wireless networking, and are used by the vast majority of wireless devices and networks today.

16. What are ad hoc networks? How do they differ from infrastructure based wireless networks?

Ad hoc networks are wireless networks that are set up on the fly, without any central infrastructure. They are typically used in situations where it would be impractical or impossible to set up a traditional wireless network. Ad hoc networks differ from infrastructure based wireless networks in that they do not require any central infrastructure, and are therefore much easier to set up and take down.

17. What is Bluetooth?

Bluetooth is a wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances. Bluetooth is a popular choice for wireless connections between devices such as cell phones, laptops, and printers.

18. What technologies have been developed to improve wireless connectivity in public spaces?

Some of the technologies that have been developed to improve wireless connectivity in public spaces include WiFi mesh networks, small cell networks, and distributed antenna systems (DAS). WiFi mesh networks are created by connecting multiple WiFi routers together to create a single, large network. Small cell networks are created by deploying a large number of small, low-power wireless access points. Distributed antenna systems (DAS) are created by installing a network of antennas throughout a public space to improve coverage.

19. What’s the best way to reduce interference when setting up multiple WLAN systems in close proximity to each other?

There are a few things you can do to reduce interference when setting up multiple WLAN systems in close proximity to each other:

– Use different channels for each system
– Use directional antennas to focus the signal in a specific direction
– Use lower transmit power levels

20. What security features do modern-day WLAN systems provide?

WLAN systems provide a number of security features, including encryption, user authentication, and access control. Encryption ensures that data transmitted over the wireless network is safe from eavesdropping. User authentication verifies that only authorized users are able to access the network. Access control restricts user access to specific resources on the network.