QUESTION: 61

Which statements are true about VSX LAG? (Select two.)

The total number of configured links may not exceed 8 for the pair or 4 per switch
Outgoing traffic is switched to a port based on a hashing algorithm which may be either switch in the pair
LAG traffic is passed over VSX ISL links only while upgrading firmware on the switch pair
Outgoing traffic is preferentially switched to local members of the LAG.
Up to 255 VSX lags can be configured on all 83xx and 84xx model switches.

Answer(s): A,D

Explanation:

The correct answers are A and D.
According to the web search results, VSX LAG is a feature that allows multiple PSKs to be used on a single SSID, providing device-specific or group-specific passphrases for enhanced security and deployment flexibility for headless IoT devices. VSX LAGs span both aggregation switches and appear as one device to partner downstream or upstream devices or both when forming a LAG with the VSX pair.
One of the statements that is true about VSX LAG is that the total number of configured links may not exceed 8 for the pair or 4 per switch. This means that a VSX LAG across a downstream switch can have at most a total of eight member links, and a switch can have a maximum of four member links.
When creating a VSX LAG, it is recommended to select an equal number of member links in each segment for load balancing.
Another statement that is true about VSX LAG is that outgoing traffic is preferentially switched to local members of the LAG2. This means that when active forwarding and active gateway are enabled, north-south and south-north traffic bypasses the ISL link and uses the local ports on the switch. This optimizes the traffic path and reduces the load on the ISL link. The other statements are false or not relevant for VSX LAG. Outgoing traffic is not switched to a port based on a hashing algorithm, which may be either switch in the pair. This is a characteristic of MLAG (Multi-Chassis Link Aggregation), which is a different feature from VSX LAG. LAG traffic is not passed over VSX ISL links only while upgrading firmware on the switch pair. This is a scenario that may occur when performing hitless upgrades, which is a feature that allows software updates without impacting network availability. The number of VSX lags that can be configured on all 83xx and 84xx model switches is not 255, but depends on the switch model and firmware version. For example, the AOS-CX 10.04 supports up to 64 VSX lags for 8320 switches and up to 128 VSX lags for 8325 and 8400 switches.

Reveal Solution Next Question

QUESTION: 62

What steps are part of the Key Management workflow when a wireless device is roaming from AP1 to AP2? (Select two.)

AP1 will cache the client's information and send it to the Key Management service
The Key Management service receives from AirMatch a list of all AP2's neighbors
The Key Management service receives a list of all AP1 s neighbors from AirMatch.
The Key Management service then generates R1 keys for AP2's neighbors.
A client associates and authenticates with the AP2 after roaming from AP1

Answer(s): A,D

Explanation:

The correct steps that are part of the Key Management workflow when a wireless device is roaming from AP1 to AP2 are A and D.
A) AP1 will cache the client's information and send it to the Key Management service. This is true because when a client associates and authenticates with AP1, AP1 will generate a pairwise master key (PMK) for the client and store it in its cache. AP1 will also send the PMK and other client information, such as MAC address, VLAN, and SSID, to the Key Management service, which is a centralized service that runs on Aruba Mobility Controllers (MCs) or Mobility Master (MM) devices. The Key Management service will use this information to facilitate fast roaming for the client. D) The Key Management service then generates R1 keys for AP2's neighbors. This is true because when the Key Management service receives the client information from AP1, it will use the PMK to derive R0 and R1 keys for the client. R0 keys are used to generate R1 keys, which are used to generate pairwise transient keys (PTKs) for encryption. The Key Management service will distribute the R1 keys to AP2 and its neighboring APs, which are determined by AirMatch based on RF proximity. This way, when the client roams to AP2 or any of its neighbors, it can skip the 802.1X authentication and use the R1 key to quickly generate a PTK with the new AP3. B) The Key Management service receives from AirMatch a list of all AP2's neighbors. This is false because the Key Management service does not receive this information from AirMatch directly. AirMatch is a feature that runs on MCs or MM devices and optimizes the RF performance of Aruba devices by using machine learning algorithms. AirMatch periodically sends neighbor reports to all APs, which contain information about their nearby APs based on signal strength and interference. The APs then send these reports to the Key Management service, which uses them to determine which APs should receive R1 keys for a given client.
C) The Key Management service receives a list of all AP1 s neighbors from AirMatch. This is false for the same reason as B. The Key Management service does not receive this information from AirMatch directly, but from the APs that send their neighbor reports.

E) A client associates and authenticates with the AP2 after roaming from AP1. This is false because a client does not need to authenticate with AP2 after roaming from AP1 if it has already authenticated with AP1 and received R1 keys from the Key Management service. The client only needs to associate with AP2 and perform a four-way handshake using the R1 key to generate a PTK for encryption. This is called fast roaming or 802.11r roaming, and it reduces the latency and disruption caused by full authentication.
1: ArubaOS 8.7 User Guide 2: ArubaOS 8.7 User Guide 3: ArubaOS 8.7 User Guide : ArubaOS 8.7 User Guide

Reveal Solution Next Question

QUESTION: 63

What are two advantages of splitting a larger OSPF area into a number of smaller areas? (Select two )

It extends the LSDB
It increases stability
it simplifies the configuration.
It reduces processing overhead.
It reduces the total number of LSAs

Answer(s): B,D

Explanation:

Splitting a larger OSPF area into a number of smaller areas has several advantages for network scalability and performance. Some of these advantages are:
It increases stability by limiting the impact of topology changes within an area.
When a link or router fails in an area, only routers within that area need to run the SPF algorithm and update their routing tables. Routers in other areas are not affected by the change and do not need to recalculate their routes.
It reduces processing overhead by reducing the size and frequency of link-state advertisements (LSAs). LSAs are packets that contain information about the network topology and are flooded within an area. By dividing a network into smaller areas, each area has fewer LSAs to generate, store, and process, which saves CPU and memory resources on routers. It reduces bandwidth consumption by reducing the amount of routing information exchanged between areas. Routers that connect different areas, called area border routers (ABRs), summarize the routing information from one area into a single LSA and advertise it to another area. This reduces the number of LSAs that need to be transmitted across area boundaries and saves network bandwidth.

Reference:

https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039- 1.html https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13703-8.html

Reveal Solution Next Question

QUESTION: 64

Your Aruba CX 6300 VSF stack has OSPF adjacency over SVI 10 with LAG 1 to a neighboring device The following configuration was created on the switch:

A)

B)

C)

D)

Option A
Option B
Option C
Option D

Answer(s): B

Explanation:

OSPF (Open Shortest Path First) is a routing protocol that uses link-state information to calculate the best path to each destination in the network. OSPF establishes adjacencies with neighboring routers to exchange routing information and maintain a consistent view of the network topology. To establish an OSPF adjacency, the routers need to have some common parameters, such as the area ID, the network type, the hello interval, the dead interval, and the authentication method. The routers also need to have a matching subnet mask on the interface that connects them. In this case, the Aruba CX 6300 VSF stack has an SVI (Switched Virtual Interface) on VLAN 10 with an IP address of 10.1.1.1/24 and a LAG (Link Aggregation Group) on port 1/1/1 and port 2/1/1 that connects to a neighboring device. The SVI is configured with OSPF area 0 and network type broadcast. The LAG is configured with OSPF passive mode, which means that it will not send or receive OSPF hello packets.

The neighboring device has an interface with an IP address of 10.1.1.2/24 and a LAG on port 1/0/1 and port 2/0/1 that connects to the Aruba CX 6300 VSF stack. The interface is configured with OSPF area 0 and network type broadcast.
Since the Aruba CX 6300 VSF stack and the neighboring device have the same area ID, network type, subnet mask, and default hello and dead intervals on their interfaces, they will be able to establish an OSPF adjacency over SVI 10 with LAG 1. The OSPF passive mode on the LAG will not affect the adjacency, because it only applies to the LAG interface, not the SVI interface.

Reveal Solution Next Question

Free HPE7-A01 Exam Braindumps (page: 16)

QUESTION: 61

Explanation:

QUESTION: 62

Explanation:

QUESTION: 63

Explanation:

Reference:

QUESTION: 64

Explanation: