Wireless Technologies & Network Fundamentals Flashcards

Which frequency band is commonly used in Wi-Fi networks?

Answer: 2.4 GHz

The 2.4 GHz frequency band is one of the most common bands used for Wi-Fi networks (alongside 5 GHz). It offers a wider range and better penetration through walls compared to 5 GHz, though it typically has lower data rates and is more susceptible to interference from other devices.

What does SSID stand for?

Answer: Service Set Identifier

SSID stands for Service Set Identifier. It is the name of a Wi-Fi network that users see when they search for available networks. It acts as a unique identifier for a wireless local area network (WLAN).

What is the purpose of a wireless access point?

Answer: To enable wireless connectivity

A wireless access point (WAP) is a networking hardware device that allows Wi-Fi compliant devices to connect to a wired network. It acts as a central hub for wireless devices, enabling them to communicate with each other and access the internet without physical cables.

Which of the following is a wireless encryption protocol?

Answer: WPA2

WPA2 (Wi-Fi Protected Access II) is a robust and widely adopted security protocol used to secure wireless computer networks. It provides strong encryption and authentication, protecting data transmitted over Wi-Fi from unauthorized access. HTTP, FTP, and SMTP are application-layer protocols, not encryption protocols.

Which device assigns IP addresses in a wireless network?

Answer: DHCP Server

A DHCP (Dynamic Host Configuration Protocol) server automatically assigns IP addresses and other network configuration parameters to devices connected to a network. This simplifies network management by eliminating the need to manually configure each device's IP address, ensuring efficient network operation.

What does 802.11 refer to?

Answer: A wireless networking standard

802.11 refers to a family of technical standards for wireless local area networks (WLANs) developed by the IEEE (Institute of Electrical and Electronics Engineers). These standards define the protocols for wireless communication, commonly known as Wi-Fi, enabling interoperability between devices.

What is the typical range of a standard Wi-Fi router indoors?

Answer: 150 feet

The typical indoor range for a standard Wi-Fi router operating on the 2.4 GHz band is approximately 100-150 feet (30-45 meters). This range can vary significantly depending on environmental factors like walls, interference, and the specific router model and antenna configuration.

What causes interference in wireless networks?

Answer: Microwaves

Microwaves operate on a similar frequency band (2.4 GHz) to many Wi-Fi networks, making them a common source of interference. Other devices like cordless phones, Bluetooth devices, and even certain fluorescent lights can also cause interference, disrupting Wi-Fi signals and reducing performance.

What is a MAC address used for?

Answer: To identify devices on a network

A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communications within a network segment. It serves as a hardware address that uniquely identifies each device on a network, allowing data to be directed to the correct recipient at the data link layer.