Which organization provides certifications that ensure interoperability between WLAN vendors?
Answer(s): C
The Wi-Fi Alliance is a non-profit organization that promotes and certifies Wi-Fi technology. The organization provides various certifications that ensure interoperability between different WLAN vendors. These certifications include the Wi-Fi CERTIFIED™ program, which tests and certifies products for adherence to industry standards and interoperability with other Wi-Fi devices, and the Wi-Fi CERTIFIED™ ac program, which certifies products for compatibility with the 802.11ac standard. The Wi-Fi Alliance also provides certification programs for other Wi-Fi technologies, such as Wi-Fi Direct and Wi-Fi Protected Setup (WPS).
https://www.wi-fi.org/certification
Which Wi-Fi technology assists with data privacy on open networks?
Answer(s): B
Opportunistic Wireless Encryption (OWE) is a Wi-Fi security technology that provides data privacy on open networks, such as public Wi-Fi hotspots. OWE uses a form of encryption known as Elliptic Curve Cryptography (ECC) to encrypt communications between a client device and an access point. This provides protection against eavesdropping and other forms of data interception.Simultaneous Authentication of Equals (SAE) is a password-based authentication protocol that is used in WPA3, the latest version of the Wi-Fi Protected Access (WPA) security protocol. SAE is designed to provide stronger protection against attacks that target weak passwords.Commercial National Security Algorithm (CNSA) is a suite of cryptographic algorithms that are used by U.S. government agencies to protect classified information. CNSA is not specifically related to Wi-Fi technology.Wi-Fi Protected Access 2 (WPA2) is a security protocol that is used to secure Wi-Fi networks. WPA2 uses Advanced Encryption Standard (AES) encryption to protect data transmitted over the network. However, WPA2 is vulnerable to some types of attacks, such as the KRACK attack that was discovered in 2017.
Which unit of measurement is recommended for expressing radio frequency power due to its logarithmic nature?
Answer(s): D
Decibel (dB)Decibel is a logarithmic unit of measure used to express the ratio of two values of the same measure. This unit is not included to the System International of units (SI), but it is widely used in communication systems and many other technical fields, as it allows to compare two values of any nature, provided that these values are expressed in the same unit.Decibel is a decile of the main, larger unit — Bel. Bel is a common logarithm of the ratio of two energies. But in practice Bel was a far too big value, therefore its tenth part is used – decibel.The logarithmic method of presentation of numbers often can be very useful, as it allows to replace multiplication with addition, division with subtraction, raising to power with multiplication, and extracting a root with the division.What is measured in dB in the MRFC:-Gain constant -Sound level -Signal/noise ratio -Signal attenuation
https://en.cyclopedia.ifcg.ru/wiki/Radiofrequency_characteristics
What are characteristics of Aruba Central? (Select two.)
Answer(s): D,E
Aruba Central is a cloud-based network management system that allows network administrators to manage Aruba networking equipment from a web-based dashboard. It can also manage third-party networking equipment. Therefore, the correct options are D and E. Option A is incorrect because Aruba Central is not an on-premises server, but rather a cloud-based service. Option B is incorrect because Aruba Central uses APIs rather than SNMP to manage Aruba networking equipment. Option C is incorrect because Aruba Central uses APIs and HTTPs to manage Aruba networking equipment.
What are the key differences between L2 switches and routers? (Select two.)
Answer(s): B,E
Switches are primarily layer 2 devices that are used for forwarding Ethernet frames based on MAC addresses. They use a MAC address table to keep track of where devices are connected to the network. Routers are primarily layer 3 devices that are used for forwarding IP packets based on their destination IP address. They use a routing table to determine the best path to forward packets. While switches can have a high port density, routers generally offer a higher port density and are used to connect different networks together.
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