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| Section | Weight | Objectives |
|---|---|---|
| WLAN | 17% | - WLAN security and connectivity modes - WLAN architecture and AP deployment - RF fundamentals and optimization |
| Network Resiliency and Virtualization | 8% | - VSX, VSF, VRF, VxLAN technologies - Redundancy and fault tolerance mechanisms |
| Network Stack | 4% | - 802.11, 802.1, and 802.3 technologies |
| Switching | 14% | - High availability at access layer - VLAN design, trunking, spanning tree - Layer 2 / Layer 3 switching implementation |
| Troubleshooting | 6% | - Fault isolation and troubleshooting methodologies - Performance and connectivity issue resolution |
| Connectivity | 8% | - Network architectures and technologies - Network device deployment |
| Routing | 13% | - Routing topologies and protocols - OSPF, policy-based routing implementation |
| Authentication and Authorization | 8% | - 802.1X, MAC authentication, ClearPass integration - AAA concepts and implementation |
| Performance Optimization | 7% | - Network performance tuning - QoS implementation and traffic management |
| Management and Monitoring | 6% | - Aruba Central management and monitoring - Automation and API usage - Monitoring tools: SNMP, Syslog, NetFlow |
| Security | 9% | - Secure access control and segmentation - Guest access and threat mitigation - Network security standards and policies |
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問題 #147
You are proposing new CX 8360 VSX switches to replace a customer's existing core switches. The customer is concerned about the possibility of a split-brain scenario between the VSX pair.
How is the VSX pair affected when the ISL is down and keepalive is up?
答案:A
問題 #148
A company recently deployed new Aruba Access Points at different branch offices Wireless 802.1X authentication will be against a RADIUS server in the cloud. The security team is concerned that the traffic between the AP and the RADIUS server will be exposed.
What is the appropriate solution for this scenario?
答案:B
解題說明:
This is the appropriate solution for this scenario where wireless 802.1X authentication will be against a RADIUS server in the cloud and the security team is concerned that the traffic between the AP and the RADIUS server will be exposed. RadSec, also known as RADIUS over TLS, is a protocol that provides encryption and authentication for RADIUS traffic over TCP and TLS. RadSec can be configured on both the AP and the RADIUS server to establish a secure tunnel for exchanging RADIUS packets. The other options are incorrect because they either do not provide encryption or authentication for RADIUS traffic or do not involve RadSec. References: https://www.securew2.com/blog/what-is-radsec/ https://www.cloudradius.com
/radsec-vs-radius/
問題 #149
Which statements are true regarding a VXLAN implementation on Aruba Switches? (Select two.)
答案:D,E
解題說明:
Option A: MTU size must be increased beyond the default This is because option A shows how to configure the MTU size for VXLAN tunnels on Aruba switches using the interface command and the vxlan command. The MTU size must be increased beyond the default value of 1500 bytes to accommodate the VXLAN header and payload.
Therefore, option A is true regarding a VXLAN implementation on Aruba switches.
Option B: VNIs encapsulate and decapsulate VXLAN traffic This is also true regarding a VXLAN implementation on Aruba switches. VNIs are used to encapsulate and decapsulate VXLAN traffic between two devices, such as a switch and a server. VNIs are also used to map VXLAN tunnels to overlay networks.
Therefore, option B is also true regarding a VXLAN implementation on Aruba switches. VXLAN is a Layer 2 encapsulation technology that substitutes the usage of VLAN numbers to label Ethernet broadcast domains with VXLAN numbers. VXLAN supports 224 Ethernet broadcast domains or VXLAN numbers. A VXLAN number ID is referred to as VNI. There is a one-to-one relationship between an Ethernet broadcast domain and a VNI. A single Ethernet broadcast domain can't have more than one VNI.
問題 #150
You are helping an onsite network technician bring up an Aruba 9004 gateway with ZTP for a branch office The technician was to plug in any port for the ZTP process to start Thirty minutes after the gateway was plugged in new users started to complain they were no longer able to get to the internet. One user who reported the issue stated their IP address is 172.16 0.81. However, the branch office network is supposed to be on 10.231 81.0/24.
What should the technician do to alleviate the issue and get the ZTP process started correctly?
答案:C
解題說明:
This is the correct action to alleviate the issue and get the ZTP (Zero Touch Provisioning) process started correctly for an Aruba 9004 gateway. ZTP is a feature that allows an Aruba gateway to automatically download its configuration from Aruba Central without any manual intervention. To use ZTP, the gateway must be connected to a DHCP-enabled network and have Internet access.
The gateway must also be added to Aruba Central using its MAC address and serial number. The default port for ZTP on an Aruba 9004 gateway is G0/0/1, which is labeled as Internet on the device. The other options are incorrect because they either do not use the correct port for ZTP or do not add the device to Aruba Central.
問題 #151
A network engineer recently identified that a wired device connected to a CX Switch is misbehaving on the network To address this issue, a new ClearPass policy has been put in place to prevent this device from connecting to the network again.
Which steps need to be implemented to allow ClearPass to perform a CoA and change the access for this wired device? (Select two.)
答案:B,C
解題說明:
Explanation
CoA (Change of Authorization) is a feature that allows ClearPass to dynamically change the authorization and access privileges of a device after it has been authenticated1. CoA uses RADIUS messages to communicate with the network device and instruct it to perform an action, such as reauthenticating the device, applying a new VLAN or user role, or disconnecting the device2.
To enable CoA on a CX switch, the network engineer needs to configure dynamic authorization on the switch, which is a global command that allows the switch to accept RADIUS messages from ClearPass and execute the requested actions3. The network engineer also needs to specify the IP address and shared secret of ClearPass as a dynamic authorization client on the switch3.
To trigger CoA for a specific wired device, the network engineer needs to bounce the switchport, which is an action that temporarily disables and re-enables the port where the device is connected. This forces the device to reauthenticate and receive the new policy from ClearPass. Bouncing the switchport can be done manually by using the interface shutdown and no shutdown commands, or automatically by using ClearPass as a CoA server and sending a RADIUS message with the Port-Bounce-Host AVP (Attribute-Value Pair).
問題 #152
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