UPDATED [Sep 23, 2024] Pass Aruba Certified Data Center Architect Exam Exam with Latest Questions [Q57-Q80]

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UPDATED [Sep 23, 2024] Pass Aruba Certified Data Center Architect Exam Exam with Latest Questions

HPE7-A04 Exam Practice Questions prepared by HP Professionals

Q57. In ToR or Middle of Rack switch-Ports oriented to server ports:

The airflow of the switches should be back to front (BF)

The airflow of the switches should be front to back (FB)

It does not matter which direction is the airflow

It is recommended to use fanless Data Center Switches to overcome the heat generated

Q58. What is a rule of thumb for oversubscription ratio on the ToR switches for a two-tier network design?

12:1-14:1

1:1-2:1

6:1-10:1

3:1-5:1

Q59. 2-Tier L2 Design
* 6400 100G Core Switches
* 8320 48-P 10G RJ45 Access Switches
* 40G DAC connections between Core and AccessCore Switches = VSX Pairs of 6400 switches (each with 2 x 12-port QSFP28 100G modules) Each pair uses:
* 2 x 1M 100G DAC for ISL
* 1 x 1M 100G DAC for Keepalive
* 2 x 5M 40G DAC to each access switch
Each Spine switch has 5 x 100G interfaces available.
This solution could scale to a maximum of:

7 total racks using same subscription rates

10 total racks using same subscription rates

12 total racks using same subscription rates

15 total racks using same subscription rates

Q60. What is true about rollback plan for migration phases? (Select two)

Staff members can’t be included in rollback dependency

Don’t give a timeframe for the rollback as this might affect customer confidence in your solution

Archive Last known good configuration (state)

Determine maximum time for rollback

Q61. Which stacking technology is a dual control plane stacking that is supported by CX switches?

Back Plane Stacking

IRF

Front Plane Stacking

VSX

Q62. In a multi-AS underlay design

You must use eBGP for underlay routing within a leaf and spine topology

Either eBGP or iBGP for underlay routing within a leaf and spine topology will work

This is a wrong design for routing protocol for the underlay

You must use iBGP for underlay routing within a leaf and spine topology

Q63. In one of the spine and leaf designs, VMware vSphere is used including VMware NSX. OSPF is used for routing protocol across the spine and leaf topology. What do you need to consider in this design? (Select three)

Adding an anycast loopback interface on each VSX pair

Using a L2 MTU of 9198 on leaf-to-spine links

Using an IP MTU of 9198 on leaf-to-spine links

Enabling OSPF in passive interface mode on the NSX transport VLAN

Q64. You are adding EVPN VXLAN to an L3 spine and leaf topology that uses OSPF for the underlay. You plan to use a single BGP AS. Which design for EVPN neighbors is correct?

Leaf switches should establish iBGP sessions with other leaf switches using their VXLAN loopback IPs. Route reflectors are not required

The border leaf switches should act as route reflectors and specify the leaf switches’ VXLAN loopback IPs as route reflector clients

At least one spine switch should act as route reflector and specify the leaf switches’ unique loopback IPs as route reflector clients

Leaf switches should establish iBGP sessions with spine switches on their actual P2P link IP addresses.Route reflectors are not required

Q65. What Fiber Optic standard supports up to 400 Gbps

No standard supports that bandwidth

QSFP+

QSFP28

QSFP-DD

Q66. You are planning a leaf and spine topology for a data center. The campus is in a different building; the customer wants to connect the campus network directly to the data center network. To which data center switch or switches do you connect the campus core switches?

To two service leaf switches, which are dedicated to connecting the spine and leaf topology to external networks

To two L3 edge switches, which are dedicated to connecting the spine and leaf topology to external networks

To two border leaf switches, which are dedicated to connecting the spine and leaf topology to external networks

To two L2 edge switches, which are dedicated to connecting the spine and leaf topology to external networks

Q67. Depending on a switch’s role in the topology, the demands on various tables differ. Several HPE Aruba CX switch models support different profiles, each of which optimizes the correct table for a switch with the corresponding role:

L3 Aggregates profile allocates more space to the support more overlay host entries table compared to leaf switches

L3 Aggregates profile allocates more space to the routing table compared to L3 core profile

L3 Aggregates profile allocates more space to the ARP/ND table compared to L3 core profile

L3 Aggregates profile allocates more space to the routing table compared to Spine switch

Q68. You need to design a network that supports transmitting RDMA traffic over multiple IP hops. Which protocols must the switches support? (Select all that apply.)

ETS

IP ECN

PFC

QCN

Q69. In a Spine and Leaf Design with the following specs:
* 8400 100G Spine Switches
* 8360 48-P 10G RJ45 Leaf Switches
* 100G DAC connections between Spine and Leafs
Spine Switches = 8400 with 12 QSFP28 ports (F-B airflow)
Each Spine Switch uses:
* 1 x 100G QSFP28 5M DACs to each Leaf switch
Each Leaf Switch uses:
* 1 x 100G QSFP28 5M DACs to each Spine switch
* 2 x 100G 1M DAC for ISL
* 1 x 10G RJ45 for Keep alive
Each Spine switch can support up to 48 available 100G QSFP28 interfaces.
What is the scalability for this solution?

Solution can scale to 24 total racks using the same subscription rates.

Solution can scale to 6 total racks using the same subscription rates.

Solution can scale to 12 total racks using the same subscription rates.

Solution can scale to 48 total racks using the same subscription rates.

Q70. What can be used to encrypt data in flight between untrusted locations?

OSPF authentication

MACSec

GRE tunnels

MD5 encryption

Q71. You are recommending HPE Aruba CX switches to a service provider for a Metro Ethernet solution. Which technology is the customer likely to require to allow each customer to stretch multiple VLANs across the Metro Ethernet line?

VMware NSX integration

RDMA over Converged Ethernet (RoCE)

Data Center Bridging (DCB)

QinQ

Q72. You want to configure your border leaf switches to leak routes between an overlay VRF named “dc1” and a VRF named “campus,” which connects to the campus core. You also want to leak routes between an overlay VRF named “dc2” and the campus VRF. “dc1” should not be able to communicate with “dc2.” Which is a valid design for the VRFs’ IPv4 route-targets?

vrf dc1, import = 1:1, export = 1:99; vrf dc2, import = 1:2, export = 1:99; vrf campus, import = 1:99, export = 1:1, 1:2

vrf dc1, import = 1:1, export = 1:1; vrf dc2, import = 1:2, export = 1:2; vrf campus, import = 1:1, 1:2, 1:
99, export = 1:99

vrf dc1, import = 1:99, export = 1:1; vrf dc2, import = 1:99, export = 1:2; vrf campus, import = 1:1, 1:2 export = 1:99

vrf dc1, import = 1:1, export = 1:1; vrf dc2, import = 1:1, export = 1:1; vrf campus, import = 1:1, export
= 1:99

Q73. What are two advantages of Campus Attached DC?

Reduced failure domain

Low latency for workloads between DC and Campus

Highly Scalable

Simple and easy to manage

Q74. You have a customer using Spine and Leaf design with two 8325 32-port 100G QSFP28 (F-B airflow) Spine Switches. What is the maximum number of racks supported if each Rack has two 8360 VSX stacked leaf switches and each spine uses 2 x 100G QSFP28 DACs to each Leaf switch?

Up to 16 total racks using different subscription rates

Up to 4 total racks using the same subscription rates

Up to 4 total racks using different subscription rates

Up to 8 total racks using the same subscription rates

Q75. You are designing a network based on HPE Aruba CX 10000 switches. Which is a valid reason to recommend manually pinning two VRFs to the same DSM?

That switch forwards traffic in both VRFs to a third-party firewall for routing

You have selected this switch to act as the border leader for a multi-fabric EVPN VXLAN design

You have planned similar policies for those VRFs and want to minimize the load on the switches’ rules table

That switch leaks routes between those VRFs

Q76. In MMF OM3 fiber type and SFP28 LC SR transceiver option. What is the maximum distance supported by this setup?

Up to 50 meters

Up to 70 meters

Up to 500 meters

Up to 700 meters

Q77. You are planning to use distributed routing for overlay subnets in an EVPN VXLAN fabric. The customer needs to provide DHCP addresses to some VMs in the tenant-a VRF. The DHCP server is in the shared VRF.
What is one step you should take?

Change the design to use centralized routing because HPE Aruba CX switches cannot support DHCP relay with distributed routing

For every SVI, assign a unique actual IP address, different from the active gateway IP address

On each VTEP switch, create a loopback interface in the shared VRF with the same IP on bothswitches in a VSX pair

On each VTEP switch, create a loopback interface in the tenant-a VRF with a different IP on both switches in a VSX pair

Q78. What is recommended for the routing protocol setup on leaf VSX pairs?

Configure the leaf VSX members to establish neighbor relationships with each other over one of the server subnets

Have the VSX members connect to each spine switch on an L3 VSX LAG and become neighbors with each other and the spine on its subnet

Add a dedicated VLAN to the VSX ISL, assign it a /31 subnet, and run the routing protocol on it

Do not configure the routing protocol to run directly between the leaf VSX members

Q79. Two VMs on the same ESXi host are assigned to an isolated VLAN 2001 (primary VLAN 1001). The host connects to an HPE Aruba CX 10000 switch on an access port. The switch supports the same PVLAN settings. VM 1 sends traffic to VM 2. Which policy or policies does the switch apply (assuming that they exist)?

Egress policy on VLAN 1001

No policies because the traffic remains local to the ESXi host

Ingress and egress policy on VLAN 1001

Ingress policy on VLAN 1001

Q80. You are designing a Data Center with Spine Leaf architecture. Spine Switches are 8400 with 12 QSFP28 ports (F-B airflow) and leaf switches are 8360 switches stacked with VSX in each rack. The Customer sent you the following Specifications Each Spine Switch uses:
* 1 x 100G QSFP28 5M DACs to each Leaf switch Each Leaf Switch uses:
* 1 x 100G QSFP28 5M DACs to each Spine switch
* 2 x 100G 1M DAC for ISL
* 1 x 25G SFP28 DAC for Keep alive
What is the scalability in this design?

Solution can scale to 12 total racks using the same subscription rates.

Solution can scale to 24 total racks using the same subscription rates.

Solution can scale to 36 total racks using the same subscription rates.

Solution can scale to 48 total racks using the same subscription rates.