HP Updated HPE3-U01 Exam Questions and Answers by rudi

 The dual-band IEEE WLAN standard that provides up to 4.8 Gbps of theoretical data rate is 802.11 be, also known as Wi-Fi 7. This standard is an amendment to the IEEE 802.11-2020 standard that aims to improve the performance, efficiency, and reliability of WLANs operating in the 2.4 GHz and 5 GHz frequency bands. Some of the key features of 802.11 be include:

• Enhanced multi-user multiple-input multiple-output (MU-MIMO) that supports up to 16 spatial streams and 37 users per channel
• Orthogonal frequency division multiple access (OFDMA) that allows multiple users to share the same channel with different subcarrier allocations
• 320 MHz channel bandwidth that enables higher data rates and spectral efficiency
• 4096 quadrature amplitude modulation (QAM) that increases the number of bits per symbol
• Multi-link operation that allows a device to connect to multiple access points (APs) simultaneously
• Enhanced power saving mechanisms that reduce the energy consumption and extend the battery life of devices

The other options are incorrect because they do not provide the same level of data rate as 802.11 be. 802.11 ac, or Wi-Fi 5, supports up to 1.73 Gbps of data rate in the 5 GHz band with 160 MHz channel bandwidth and 256 QAM. 802.11 ax, or Wi-Fi 6, supports up to 9.6 Gbps of data rate in both 2.4 GHz and 5 GHz bands with 160 MHz channel bandwidth, 1024 QAM, and OFDMA, but it is not a dual-band standard as it also supports the 6 GHz band. 802.11 n, or Wi-Fi 4, supports up to 600 Mbps of data rate in both 2.4 GHz and 5 GHz bands with 40 MHz channel bandwidth and 64 QAM. 802.1 lax and 802.1 In are not valid IEEE WLAN standards. References: IEEE 802.11be Extremely High Throughput: The Next Generation of Wi-Fi Technology Beyond 802.11ax, Wi-Fi Timeline, IEEE 802.11-2020

The subnet mask 255.255.252.0 is equivalent to the CIDR notation /22, which means that 22 bits are used for the network prefix and 10 bits are used for the host part. To calculate the number of addresses that this subnet mask provides, we can use the formula2n−2, wherenis the number of bits in the host part. In this case,n=10, so the number of addresses is210−2=1024−2=1022. The subtraction of 2 is because the first and the last addresses are reserved for the network identifier and the broadcast address, respectively. Therefore, the subnet mask 255.255.252.0 provides 1022 usable addresses for hosts, plus 2 reserved addresses, for a total of 1024 addresses.References:IP Subnet Calculator,How many host addresses are available on the network … - ITExamAnswers

A device that provides high ethernet port density for connecting wired clients is a switch. A switch is a device that operates at the data link layer (layer two) of the OSI model and forwards frames between devices on the same network based on their MAC addresses1. A switch can have multiple ports, ranging from 8 to 48 or more, that can connect to various wired devices, such as computers, IP phones, and printers2. A multilayer switch is a switch that can also operate at the network layer (layer three) of the OSI model and perform routing functions based on IP addresses3. Therefore, statements D and E are correct. Statements A, B, and C are incorrect because they describe devices that provide wireless connectivity, not wired connectivity. A wireless router is a device that combines the functions of a router and an access point and provides wireless access to the internet. A router is a device that operates at the network layer (layer three) of the OSI model and forwards packets between different networks based on their destination IP addresses. An access point is a device that connects wireless devices to a wired network and acts as a bridge between the two. References: 1: Aruba Certified Network Technician (ACNT) Study Guide, page 282: Aruba Certified Network Technician (ACNT) Study Guide, page 303: Aruba Certified Network Technician (ACNT) Study Guide, page 32. : Aruba Certified Network Technician (ACNT) Study Guide, page 29. : Aruba Certified Network Technician (ACNT) Study Guide, page 29. : Aruba Certified Network Technician (ACNT) Study Guide, page 94.

The binary equivalent of the decimal number of 233 is 11101001. To find this, we can use the following method:

• Divide 233 by 2 and write down the remainder. The remainder is either 0 or 1.
• Divide the quotient by 2 and write down the new remainder.
• Repeat this process until the quotient is 0.
• Write the remainders from the bottom to the top. This is the binary equivalent.

For example:

Table

Quotient

Remainder

233 / 2

1

116 / 2

0

58 / 2

0

29 / 2

1

14 / 2

0

7 / 2

1

3 / 2

1

1 / 2

1

0 / 2

0

The remainders from the bottom to the top are 11101001, which is the binary equivalent of 233.

References:

1: Decimal to Binary Converter - RapidTables 2: How to Convert Decimal to Binary - wikiHow 3: Decimal to Binary Conversion Methods - GeeksforGeeks