Which techniques are widely used for wireless LANs?

Spread spectrum is currently the most widely used transmission technique for wireless LANs. It was initially developed by the military to avoid jamming and eavesdropping of the signals.

How do wireless LANs communicate?

All components that can connect into a wireless medium in a network are referred to as stations. All stations are equipped with wireless network interface controllers. … They transmit and receive radio frequencies for wireless-enabled devices to communicate with.

Why do we need wireless LAN?

The most obvious advantage of a WLAN is that devices can connect wirelessly, eliminating the need for cables. This allows homes and businesses to create local networks without wiring the building with Ethernet. It also provides a way for small devices, such as smartphones and tablets, to connect to the network.

Which technology is generally used for setting up wireless LANs Class 8?

Answer: The IEEE 802.11 group of standards defines the technologies for wireless LANs. For path sharing, 802.11 standard uses the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance). It also uses an encryption method i.e. wired equivalent privacy algorithm.

What is WLAN example?

WLAN Devices

Wireless LANs can contain many types of devices, including: Mobile phones. Laptop and tablet computers. Internet audio systems.

What are 3 types of wireless connections?

There are basically three different types of wireless networks – WAN, LAN and PAN: Wireless Wide Area Networks (WWAN): WWANs are created through the use of mobile phone signals typically provided and maintained by specific mobile phone (cellular) service providers.

What is the full form of WLAN Mcq?

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Wireless Local Area Networks (WLANs)”. … Explanation: WLAN stands for Wireless Local Area Network.

What is wireless Ethernet?

A. W. The standard for wireless networking within a home or office. Also known as a “Wi-Fi” or “802.11” network, wireless Ethernet is the wireless counterpart to regular, wired Ethernet, which is also the standard for local networks.

What are the types of wireless?

§Types of Wireless Networks
Type Range Standards
Personal area network (PAN) Within reach of a person Bluetooth, ZigBee, NFC
Local area network (LAN) Within a building or campus IEEE 802.11 (WiFi)
Metropolitan area network (MAN) Within a city IEEE 802.15 (WiMAX)
Wide area network (WAN) Worldwide Cellular (UMTS, LTE, etc.)

Which topology is used in wireless network?

Star topology
Star topology for wireless networks

The topology that is most useful for wireless networking at the moment is the Star, in which each node connects to a central hub that distributes the data wherever it needs to go.

What are the types of wireless devices?

There are different types of wireless communication devices like mobiles. Cordless telephones, Zigbee wireless technology, GPS, Wi-Fi, satellite television, and wireless computer parts. Current wireless phones include 3 and 4G networks, Bluetooth, and Wi-Fi technologies.

What is wireless revolution?

The wireless revolution began in the 1990s, with the advent of digital wireless networks leading to a social revolution, and a paradigm shift from wired to wireless technology, including the proliferation of commercial wireless technologies such as cell phones, mobile telephony, pagers, wireless computer networks, …

What is the logical topology of a network?

A logical topology is a concept in networking that defines the architecture of the communication mechanism for all nodes in a network. Using network equipment such as routers and switches, the logical topology of a network can be dynamically maintained and reconfigured.

Which network topology uses a central hub or controller?

Which topology requires a central controller or hub ? Explanation : Star topology and tree topology requires central controller or hub.

What is LAN topology?

Topology is the physical and logical arrangement of a network. The logical arrangement of a network refers to how the workstations, servers, and other equipment relate to each other in terms of traffic flow. … There are three primary LAN topologies: linear bus, ring, and star.

What are 2 logical LAN topologies?

The two logical topologies are broadcast (also known as bus) and sequential (also known as ring). In a broadcast topology, all devices on the network receive every message transmitted.

What are examples of logical topology?

Logical topologies are bound to the network protocols that direct how the data moves across a network. The Ethernet protocol is a common logical bus topology protocol. LocalTalk is a common logical bus or star topology protocol. IBM’s Token Ring is a common logical ring topology protocol.

Which type of network topology is most popular quizlet?

The star topology is the most common topology in local area networks. A ring topology features a closed loop.

Which topology is best for LAN and why?

Star topology has become the dominant physical topology for LANs. The star was first popularized by ARCNET, and later adopted by Ethernet. Each node is connected directly to a central device such as a hub or a switch, as shown in Figure 5.17.

What are the three primary logical topologies?

Logical topology:

Different types of Physical Topologies are: P2P Topology. Bus Topology. Ring Topology.

What is physical and logical network diagram?

Logical network diagrams focus in on how traffic flows across the network, IP addresses, admin domains, how domains are routed, control points, and so on. … A physical network diagram will, ideally, show the network topology exactly as it is: with all of the devices and the connections between them.

What is the most common topology used in LANs?

star topology
The star topology is the most common topology in today’s networks, and includes Ethernet, Fast Ethernet, and Gigabit Ethernet. Each node in a star topology connects to a dedicated link where the other end connects to a switch or hub.

Which topology is more suited for LAN network?

Star and Extended Star Topologies

The star and extended star are the most popular topologies for Ethernet networks. This type network is easy to setup, relatively inexpensive, and provides more redundancy than other topologies, i.e. bus topology.

What is a component of LAN?

A LAN comprises cables, access points, switches, routers, and other components that enable devices to connect to internal servers, web servers, and other LANs via wide area networks.