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NEW QUESTION # 30
Which dual-band IEEE WLAN standard provides up to 4.8 Gbps of theoretical data rate?
- A. 802.11 be
- B. 802.1 In
- C. 802.11 ac
- D. 802.1 lax
Answer: A
Explanation:
Explanation
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
NEW QUESTION # 31
What is the binary equivalent of the decimal number of 233?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 32
Refer to Exhibit.
The PC is sending a message to the server. Which devices have performed Layer 2 encapsulation by the time the message arrives at the server? (Select two.)
- A. Switch-1
- B. Router
- C. switch-2
- D. PC
- E. Server
Answer: A,C
NEW QUESTION # 33
At which section of the Aruba Central WLAN configuration Wizard can you set the Role Based controls?
- A. VLANs
- B. General
- C. Access
- D. Security
Answer: D
Explanation:
Explanation
Role Based controls are a feature of Aruba Central that allows you to assign different access privileges and policies to different groups of users on a WLAN network. You can set the Role Based controls in the Security section of the Aruba Central WLAN configuration Wizard. In this section, you can configure the following parameters:
* Authentication Type: The method of verifying the identity of users who connect to the WLAN network.
You can choose from several options, such as WPA2-Enterprise, WPA2-Personal, Captive Portal, MAC Authentication, or Open.
* Authentication Server: The server that performs the authentication process for the users. You can select an existing server from the list, or create a new one by clicking the + icon. You can also configure the server settings, such as IP address, port, shared secret, and timeout.
* User Role Assignment: The method of assigning user roles to the authenticated users. You can choose from several options, such as Default Role, Role Derivation, or Server Group Role. A user role is a set of firewall policies and VLAN settings that define the access privileges and restrictions for a group of users.
* Default User Role: The user role that is assigned to the users by default, if no other role assignment method is selected. You can select an existing user role from the list, or create a new one by clicking the
+ icon. You can also configure the user role settings, such as firewall policies, VLAN ID, and bandwidth limit.
References:
* Configuring Security Settings for Wireless Network
* Basic WLAN Configuration Workflow
NEW QUESTION # 34
What is a characteristic of IPv4 addresses?
- A. It is 32 bits long
- B. 12 hex-digit notation
- C. It is 128 bits long
- D. Has zero compression rule
Answer: A
NEW QUESTION # 35
Which command should you enter to access the second interface of a one-rack-unit standalone ArubaOS-CX switch?
- A. Interface 0/1/2
- B. Interface 1/0/2
- C. Interface 0/0/2
- D. Interface 1/1/2
Answer: D
NEW QUESTION # 36
Which configurable switchport feature makes collisions impossible to occur?
- A. full-duplex
- B. VLANs
- C. half-duplex
- D. auto speed
Answer: A
NEW QUESTION # 37
What is the decimal equivalent of the binary number 10001010?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
Explanation
To convert a binary number to a decimal number, we need to follow these steps:
* Write down the binary number and assign a power of 2 to each digit, starting from the rightmost with
2^0.
* Convert each binary digit to its decimal equivalent by multiplying it with its power of 2.
* Add all the decimal values to get the decimal equivalent of the binary number.
Let's apply these steps to the binary number 10001010:
* 10001010 = 0 × 2^0 + 1 × 2^1 + 0 × 2^2 + 1 × 2^3 + 0 × 2^4 + 0 × 2^5 + 0 × 2^6 + 1 × 2^7
* 10001010 = 0 + 2 + 0 + 8 + 0 + 0 + 0 + 128
* 10001010 = 138 in decimal
Therefore, the decimal equivalent of the binary number 10001010 is 138 (option A).
References: The answer can be verified by using the following resources:
* Convert 10001010 from binary to decimal - Calculator Online
* How to Convert decimal number 10001010 in binary? - CoolConversion
* 10001010 to decimal - Calculatio
* Binary Code | Binary: 10001010 | Decimal: 138 | Bits: 8
NEW QUESTION # 38
Which device provides high ethernet port density for connecting wired clients such as computers, IP phones, and printers? (Select two.)
- A. Access Point
- B. Multilayer Switches
- C. Router
- D. Wireless Router
- E. Switches
Answer: B,E
Explanation:
Explanation
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.
NEW QUESTION # 39
What is considered a Layer 2 component?
- A. UTP cable
- B. Switch
- C. Router
- D. Transceiver
Answer: B
NEW QUESTION # 40
Which commands are required to configure interfaces 1 /1/1 and 1 /1/2 as VLAN 10 access ports in ArubaOS-CX switches?
- A. Option B
- B. Option A
- C. Option C
- D. Option D
Answer: D
NEW QUESTION # 41
How many addresses does the 255.255.252.0 provide?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
Explanation
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 formula2n2, wherenis the number of bits in the host part. In this case,n=10, so the number of addresses is2102=10242=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
NEW QUESTION # 42
Refer to Exhibit.
To which protocol does the header belong?
- A. Transmission Control Protocol
- B. Internet Protocol
- C. User Datagram Protocol
- D. Internet Protocol version 6
- E. Ethernet Protocol
Answer: B
Explanation:
Explanation
The header in the exhibit belongs to the Internet Protocol version 4 (IPv4), which is the most widely used protocol for routing and delivering packets across networks. IPv4 is a connectionless and unreliable protocol that operates at the network layer of the OSI model. The IPv4 header consists of 20 bytes (160 bits) of fixed fields and up to 40 bytes (320 bits) of optional fields. The fixed fields include:
* Version: 4 bits that indicate the version of the IP protocol, which is 4 for IPv4.
* IHL (Internet Header Length): 4 bits that indicate the length of the IP header in 32-bit words, which is 5 for the minimum header size of 20 bytes.
* Type of Service: 8 bits that indicate the quality of service (QoS) parameters for the packet, such as precedence, delay, throughput, and reliability.
* Total Length: 16 bits that indicate the total length of the IP packet in bytes, including the header and the data.The maximum value is 65535 bytes.
* Identification: 16 bits that identify the packet for fragmentation and reassembly purposes.
* Flags: 3 bits that control the fragmentation of the packet. The first bit is reserved and must be zero. The second bit is the Don't Fragment (DF) bit, which indicates whether the packet can be fragmented or not.
The third bit is the More Fragments (MF) bit, which indicates whether the packet is the last fragment or
* not.
* Fragment Offset: 13 bits that indicate the position of the fragment in the original packet, measured in units of 8 bytes.
* TTL (Time To Live): 8 bits that indicate the maximum number of hops that the packet can traverse before being discarded. The TTL is decremented by one at each hop, and the packet is dropped if the TTL reaches zero.
* Protocol: 8 bits that indicate the protocol of the data carried in the packet, such as TCP, UDP, ICMP, etc. The protocol numbers are defined in the List of IP protocol numbers.
* Header Checksum: 16 bits that provide error detection for the IP header. The checksum is calculated by adding the 16-bit words of the header and taking the one's complement of the result.The checksum is recomputed and verified at each hop.
* Source IP Address: 32 bits that indicate the IP address of the sender of the packet.
* Destination IP Address: 32 bits that indicate the IP address of the receiver of the packet.
* Options: Variable-length field that contains optional information for the IP packet, such as security, routing, timestamp, etc. The options are padded with zeros to make the header length a multiple of 32 bits.
The IPv4 header can be distinguished from other protocol headers by the value of the Version field, which is 4 for IPv4. Other protocol headers have different values for the Version field or do not have a Version field at all. For example, the IPv6 header has a Version field of 6, the UDP header does not have a Version field, the Ethernet header has a Type field instead of a Version field, and the TCP header has a Data Offset field instead of a Version field. References:
* Aruba Certified Network Technician (ACNT) | HPE Aruba Networking
* Aruba Documentation Portal
* Introduction and IPv4 Datagram Header - GeeksforGeeks
* Protocol header - Oxford Reference
* List of IP protocol numbers - Wikipedia
NEW QUESTION # 43
How many addresses does the 255.255.252.0 provide?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 44
What is the maximum recommended distance for a 1 Gbps Ethernet connection using Cat 6 UTP-based cabling between a host and the switch where it is plugged in?
- A. 100 meters (328 feet)
- B. 50 meters (164 feet)
- C. 15 meters (49 feet)
- D. 300 meters (984 feet)
Answer: A
NEW QUESTION # 45
Refer to Exhibit.
To which protocol does the header belong?
- A. Transmission Control Protocol
- B. Internet Protocol
- C. User Datagram Protocol
- D. Ethernet Protocol
- E. Internet Protocol version 6
Answer: E
NEW QUESTION # 46
Which organization provides certifications that ensure interoperability between WLAN vendors?
- A. Wi-Fi Alliance
- B. Internet Engineering Task Force
- C. Institute of Electrical and Electronics Engineers
- D. Federal Communications Commission
Answer: A
Explanation:
Explanation
https://www.wi-fi.org/certification
NEW QUESTION # 47
Before routers forward unicast packets, what information is compared with the unicast routing table entries?
- A. The source address of the IP header.
- B. The inbound port the packet is received in.
- C. The destination address of the Ethernet header.
- D. The destination address of the IP header.
- E. The source address of the Ethernet header.
Answer: C
NEW QUESTION # 48
Which characteristic allows switches to mitigate collisions?
- A. The switches use L3 protocols that eliminate collisions.
- B. The switches support VLANs that segment the collision domains.
- C. The switches' ports are independent collision domains.
- D. The switches have proprietary features that help eliminate collisions.
Answer: B
NEW QUESTION # 49
Which organization is in charge of determining the International Standards?
- A. Wi-Fi Alliance
- B. Institute of Electrical and Electronics Engineers
- C. Internet Engineering Task Force
- D. Federal Communications Commission
Answer: C
NEW QUESTION # 50
On which connection type are collisions more likely to happen?
- A. Wi-Fi
- B. Copper
- C. Fiber
- D. Dark Fiber
Answer: A
Explanation:
Explanation
A collision occurs when two or more devices try to transmit data at the same time on a shared medium, such as a cable or a wireless channel. Collisions result in corrupted or lost data, and reduce the efficiency of the network. Different connection types have different susceptibility to collisions, depending on how they handle data transmission and collision detection.
Dark fiber and fiber are optical connections that use light to transmit data. They are immune to electromagnetic interference and have very high bandwidth. They also use full-duplex communication, which means that data can be sent and received simultaneously on separate fibers. Therefore, collisions are very unlikely to happen on dark fiber and fiber connections.
Copper is an electrical connection that uses metal wires to transmit data. It is prone to electromagnetic interference and has lower bandwidth than optical connections. It can use either half-duplex or full-duplex communication, depending on the device and the protocol. Half-duplex communication means that data can only be sent or received at a time on the same wire. Therefore, collisions are more likely to happen on copper connections that use half-duplex communication, such as Ethernet hubs.
Wi-Fi is a wireless connection that uses radio waves to transmit data. It is also prone to electromagnetic interference and has lower bandwidth than optical connections. It uses half-duplex communication, which means that data can only be sent or received at a time on the same channel. Therefore, collisions are very likely to happen on Wi-Fi connections, especially when there are many devices using the same channel or frequency.
References:
* Types of Collisions
* What are elastic and inelastic collisions?
* Why is a switch port a collision domain?
NEW QUESTION # 51
What are the key differences between L2 switches and routers? (Select two.)
- A. Switches build an ARP table, while routers build a port table.
- B. Switches offer a considerably higher port density than routers.
- C. Routers offer a considerably higher port density than switches.
- D. Switches build a MAC table while routers build a routing table.
- E. Switches are considered L2 devices, while routers are L4.
Answer: B,D
NEW QUESTION # 52
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