HPE3-U01 Exam Dumps - Aruba Certified Network Technician Exam (ACNT)

Ethernet is a protocol that provides frame delivery using physical addressing and error detection using frame check sequence. Ethernet frames have a source and destination MAC address that identify the physical devices on the network. Ethernet frames also have a frame check sequence (FCS) field that uses a cyclic redundancy check (CRC) to detect errors in the frame. If the receiver calculates a different FCS value than the one in the frame, it discards the frame and may request a retransmission. Link Layer DiscoveryProtocol (LLDP) is a protocol that allows devices to discover and advertise information about themselves and their neighbors. TCP/IP is a suite of protocols that operate at the network and transport layers, not the data link layer. User Datagram Protocol (UDP) is a transport layer protocol that provides connectionless and unreliable data delivery, without error detection or correction. References: Ethernet Frame Format - Aruba, Frame check sequence - Wikipedia

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

The Wi-Fi Alliance is an organization that promotes interoperability among WLAN device manufacturers. The Wi-Fi Alliance is an important organization for the advancement of wireless LAN (WLAN) technology. It develops certification programs and technologies that deliver quality Wi-Fi experiences. Members have completed more than 80,000 certifications. Through industry-developed comprehensive testing, Wi-Fi Alliance certification programs ensure that Wi-Fi products from multiple manufacturers work well together. These certification programs are foundational to the rapid adoption and proliferation of Wi-Fi products in home, office, and public access locations around the world and underpin the success of Wi-Fi technology proliferation. Only Wi-Fi CERTIFIED™ products have been tested to deliver interoperability with the latest technologies, and industry-standard security protections. The Wi-Fi CERTIFIED logo gives consumersconfidence that the Wi-Fi devices purchased deliver a positive user experience, regardless of brand. For retailers, vendors, and service providers, the Wi-Fi CERTIFIED seal of approval means consistent performance and better user experience. A company must be a member of Wi-Fi Alliance ® and achieve certification to use the Wi-Fi CERTIFIED logo and Wi-Fi CERTIFIED certification marks. The Wi-Fi Alliance certification programs cover the following categories: Connectivity, Security, Mobility, Coexistence, and Performance123. References: Certification | Wi-Fi Alliance, Programs | Wi-Fi Alliance, Aruba Certified Network Technician Exam HPE3-U01 Actual Questions, Why Wi-Fi Certification Really Matters | Aruba Blogs

According to the Ethernet cable standards, Cat 6 UTP-based cabling can support 1 Gbps data rates up to 100 meters (328 feet) of cable length. This is the maximum recommended distance for a single cable run between a host and the switch where it is plugged in. If the cable length exceeds 100 meters, the signal quality may degrade and cause errors or lower performance. Cat 6 UTP-based cabling can also support 10 Gbps data rates up to 37-55 meters (121-180 feet), depending on the alien crosstalk atmosphere. However, for 10 Gbps data rates, Cat 6a UTP-based cabling is preferred, as it can support the full 100 meters of cable length. References https://networkengineering.stackexchange.com/questions/81114/degradation-of-signal-quality-as-a-function-of-cat-6-cable-length

https://www.howtogeek.com/813419/how-long-can-an-ethernet-cable-be/

The table that clients must populate to remember the L2 addressing of their neighbors is the ARP table. ARP stands for Address Resolution Protocol, which is a protocol that maps an IP address to a MAC address1. A MAC address is a unique identifier for a network interface card (NIC) that operates at the data link layer (layer two) of the OSI model2. An IPaddress is a logical identifier for a device that operates at the network layer (layer three) of the OSI model3. When a client wants to communicate with another device on the same network, it needs to know the MAC address of the destination device. To do this, the client sends an ARP request, which is a broadcast message that asks “Who has this IP address?” The device that has the matching IP address replies with an ARP reply, which contains its MAC address. The client then stores this information in its ARP table, which is a cache of IP-to-MAC mappings. Therefore, statement B is correct. Statements A, C, and D are incorrect because they describe different types of tables. A MAC table is a table that a switch uses to store MAC addresses and the corresponding ports that they are connected to. A routing table is a table that a router uses to store the destination networks and the next-hop addresses that they are reachable through. An ethernet table is not a valid term in networking. References: 1: Aruba Certified Network Technician (ACNT) Study Guide, page 342: Aruba Certified Network Technician (ACNT) Study Guide, page 283: Aruba Certified Network Technician (ACNT) Study Guide, page 29. : Aruba Certified Network Technician (ACNT) Study Guide, page 35. : Aruba Certified Network Technician (ACNT) Study Guide, page 30. : Aruba Certified Network Technician (ACNT) Study Guide, page 31.

To convert a hexadecimal number to a binary number, we need to follow these steps:

• Write down the hexadecimal number and assign a power of 16 to each digit, starting from the rightmost with 16^0.
• Convert each hexadecimal digit to its decimal equivalent by multiplying it with its power of 16.
• Add all the decimal values to get the decimal equivalent of the hexadecimal number.
• Divide the decimal number by 2 repeatedly and write down the remainders from bottom to top.
• The binary number is the sequence of remainders obtained in the previous step.

Let’s apply these steps to the hexadecimal number 17:

• 17 = 1 × 16^1 + 7 × 16^0
• 17 = 16 + 7
• 17 = 23 in decimal
• 23 / 2 = 11 with remainder 1
• 11 / 2 = 5 with remainder 1
• 5 / 2 = 2 with remainder 1
• 2 / 2 = 1 with remainder 0
• 1 / 2 = 0 with remainder 1
• The binary number is 10111

Therefore, the binary equivalent of the hexadecimal number 17 is 10111 (option B).

References: The answer can be verified by using the following resources:

• Hexadecimal to Binary Converter - Binary Hex Converters
• How to Convert 17 from hexadecimal to binary - Calculator Online
• Convert hexadecimal number 17 to binary - CoolConversion
• 17 in Binary - How to Convert 17 from Decimal to Binary? - Cuemath

Full-duplex is a switchport feature that allows simultaneous transmission and reception of data on a link, without causing collisions. Collisions occur when two devices try to send data at the same time on a shared medium, such as a half-duplex link or a hub. Full-duplex eliminates the need for collision detection and avoidance mechanisms, such as CSMA/CD, and increases the effective bandwidth of the link. Full-duplex requires both ends of the link to support and be configured for full-duplex mode. If one end is configured for full-duplex and the other for half-duplex, the result is a duplex mismatch, which causes performance issues and errors. Auto speed is a switchport feature that allows the switch to negotiate the speed of the link with the connected device, such as 10 Mbps, 100 Mbps, or 1000 Mbps. VLANs are logical groups of devices that share the same broadcast domain, regardless of their physical location or connection. VLANs can reduce collisions by segmenting the network and limiting the scope of broadcasts. However, VLANs alone do not prevent collisions on a link, as they depend on the duplex mode of the switchport. Half-duplex is a switchport feature that allows only one direction of data transmission at a time on a link, either sending or receiving. Half-duplex requires collision detection and avoidance mechanisms, such as CSMA/CD, to coordinate the access to the shared medium. Half-duplex reduces the effective bandwidth of the link by half, as only one device can use the link at a time. Half-duplex can cause collisions if two devices try to send data at the same time on the same link. References:

• Aruba Certified Network Technician (ACNT) | HPE Aruba Networking
• Aruba Documentation Portal
• switch port collisions - Cisco Community
• Why is a switch port a collision domain? - Cisco Community

 The TCP three-way handshake is a process that is used in a TCP/IP network to create a connection between a client and a server. It involves the exchange of three packets: SYN, SYN-ACK, and ACK. The goal of the TCP three-way handshake is to establish a reliable, flow-controlled connection between the two endpoints. This means that the connection is able to ensure that the data is transmitted without errors, losses, or duplications, and that the data is sent at a rate that both sides can handle.

The TCP three-way handshake works as follows:

• The client initiates the connection by sending a SYN packet to the server. The SYN packet contains a random sequence number that indicates the starting point of the data that the client will send.
• The server responds to the client by sending a SYN-ACK packet. The SYN-ACK packet contains the server’s own sequence number and an acknowledgment number that is equal to the client’s sequence number plus one. This indicates that the server has received the client’s SYN packet and is ready to receive data from the client.
• The client completes the handshake by sending an ACK packet to the server. The ACK packet contains an acknowledgment number that is equal to the server’s sequence number plus one. This indicates that the client has received the server’s SYN-ACK packet and is ready to send data to the server.

After the TCP three-way handshake is completed, the connection is established and the data transfer can begin.

References: The answer can be verified by using the following resources:

• TCP 3-Way Handshake Process - GeeksforGeeks
• TCP 3-Way Handshake (SYN, SYN-ACK,ACK) - Guru99
• Akamai Blog | What is a TCP Three-Way Handshake?
• What is a Three-Way Handshake? - Definition from Techopedia
• What is TCP 3-Way Handshake, Benefits, and Drawbacks? - Networking Signal