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| Section | Objectives |
|---|---|
| Networking Fundamentals | - OSI and TCP/IP models - Ethernet fundamentals and switching concepts |
| Network Security Fundamentals | - Port security and access control - Basic authentication methods |
| Monitoring and Troubleshooting | - Basic switch troubleshooting tools and commands - Network monitoring concepts |
| Switching Technologies | - Spanning Tree Protocol (STP/RSTP) basics - VLAN configuration and operation - Trunking (802.1Q) concepts |
| Network Redundancy and Resiliency | - Redundant switching design principles - Link aggregation (LACP) |
| IP Services and Routing Basics | - Inter-VLAN routing concepts - IPv4 addressing and subnetting |
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問題 #55
Users report poor performance when uploading files to their document management server in the same subnet.
You suspect packet loss is causing the problem.
Which tool in HPE Aruba Networking Central can you use to confirm this?
答案：C
解題說明：
The correct answer is C. Commands - show interface error-statistics. Because the users and the document management server are in the same subnet, traffic is switched locally rather than routed across multiple Layer
3 hops. If packet loss is suspected during file uploads, the most useful verification is to inspect interface error counters on the switch ports involved. HPE Aruba Networking AOS-CX documentation includes the show interface < IFNAME > error-statistics command, which displays interface error statistics such as receive and transmit errors, CRC/FCS errors, drops, runts, giants, and related counters. HPE Aruba Networking Central documentation states that the Commands tab can run troubleshooting commands on managed devices and show the output in the Device Output section. A cable test may help detect physical cabling faults, but it does not directly confirm packet loss counters. Traceroute is less useful within the same subnet. Ping can show reachability loss, but interface error statistics provide better evidence of switch-port packet errors causing performance problems.
問題 #56
What kind of cables might you use to connect to the AOS-CX switch console port? (Select two)
答案：A,C
問題 #57
Which user group exists by default on a CX 6100 series switch?
答案：C
解題說明：
CX 6100 series switches have a default user account named "root" with full administrative privileges for initial access and configuration.
問題 #58
When a VSF stack is created, how are the VLANs configured for the VSF links?
答案：B
解題說明：
The correct answer is A. The VSF ports automatically forward the traffic for configured VLANs. In HPE Aruba Networking CX VSF, the VSF link ports are dedicated stack-fabric interfaces between VSF members.
They are not configured like normal access or trunk ports for user VLAN forwarding. HPE Aruba Networking Central documentation for AOS-CX ports and LAGs notes that VLAN mode options such as access or trunk are not visible for VSF ports, which confirms that VSF ports are not manually configured as normal VLAN trunks. Once the VSF stack is formed, the stack operates as one logical switch, and the VSF links carry the necessary internal stack traffic automatically, including traffic associated with configured VLANs. Option B is incorrect because you do not configure VSF ports as trunk ports with vlan trunk allowed all. Option C is incorrect because vsf-sync is not required for VLAN forwarding across VSF links. Option D is incorrect because VLAN 4095 is not manually configured on VSF links for this purpose.
問題 #59
Why would a device perform an ARP request?
答案：D
解題說明：
The correct answer is B. To find the destination MAC address for a specific IP address. ARP, or Address Resolution Protocol, is used on IPv4 Ethernet networks to map a Layer 3 IPv4 address to a Layer 2 MAC address. HPE Aruba Networking AOS-CX documentation states that ARP maps network addresses assigned to devices to physical addresses, and specifically maps IPv4 network addresses to Layer 2 MAC addresses on Ethernet networks. When a host wants to send traffic to another IPv4 device on the same local network, or to its default gateway, it must know the destination MAC address to build the Ethernet frame. If the MAC address is not already in its ARP table, it sends an ARP request asking which device owns the target IP address. Option A is incorrect because ARP is not used to find a source IP address. Option C is incorrect because the device already knows its own source MAC address. Option D describes reverse mapping, which is not the purpose of a normal ARP request.
問題 #60
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