5V0-41.21

A security administrator is required to protect East-West virtual machine traffic with the NSX Distributed Firewall.

What must be completed with the virtual machine’s vNIC before applying the rules?
A . It is connected to the underlay.
B. It must be connected to a vSphere Standard Switch.
C. It is connected to an NSX managed segment.
D. It is connected to a transport zone.

View Answer

Answer: C

Explanation:

In order to apply the rules, the vNIC of the virtual machine must be connected to an NSX managed segment. The NSX managed segment is a logical representation of the virtual network, and all rules are applied at this level.

For more information on NSX Distributed Firewall and how to configure it, please refer to the NSX-T Data Center documentation: https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/nsx-t-3.0-firewall/GUID-B6B835F2-B6F2-4468-8F8E-6F7B9B9D6E91.html

Which three are required by URL Analysis? (Choose three.)

A. NSX Enterprise or higher license key

B. Tier-1 gateway

C. Tier-0 gateway

D. OFW rule allowing traffic OUT to Internet

E. Medium-sized edge node (or higher), or a physical form factor edge

F. Layer 7 DNS firewall rule on NSX Edge cluster

View Answer

Answer: B,D,F

Explanation:

To use URL Analysis, you will need to have a Tier-1 gateway and a Layer 7 DNS firewall rule on the NSX Edge cluster. Additionally, you will need to configure an OFW rule allowing traffic OUT to the Internet. Lastly, a medium-sized edge node (or higher), or a physical form factor edge is also required as the URL Analysis service will run on the edge node. For more information, please see this VMware Documentation article[1], which explains how to configure URL Analysis on NSX.

[1] https://docs.vmware.com/en/VMware-NSX-T-Data-

Center/3.1/nsxt_31_url_analysis/GUID-46BC65F3-7A45-4A9F-B444-E4A1A7E0AC4A.html

What needs to be configured on each transport node prior to using NSX-T Data Center Distributed Firewall time-based rule publishing?
A . DNS
B. NTP
C. PAT
D. NAT

View Answer

Answer: B

Explanation:

In order to use NSX-T Data Center Distributed Firewall time-based rule publishing, the NTP (Network Time Protocol) needs to be configured on each transport node. This ensures that the transport nodes have accurate time synchronization, which is required for time-based rule publishing. Additionally, DNS (Domain Name System) and PAT (Port Address Translation) may also need to be configured on each transport node, depending on the desired configuration. References:

[1] https://docs.vmware.com/en/VMware-NSX-T/2.5/com.vmware.nsxt.admin.doc/GUID-E9F8D8AD-7AF1-4F09-B62C-

6A17A6F39A6C.html [2] https://docs.vmware.com/en/VMware-NSX-T/2.4/com.vmware.nsxt.admin.doc/GUID-E9F8D8AD-7AF1-4F09-B62C-6A17A6F39A6C.html

An NSX administrator is trying to find the dvfilter name of the sa-web-01 virtual machine to capture the sa-web-01 VM traffic.

What could be a reason the sa-web-01 VM dvfilter name is missing from the command output?
A . sa-web-01 VM has the no firewall rules configured.
B. ESXi host has 5SH disabled.
C. sa-web-01 is powered Off on ESXi host.
D. ESXi host has the firewall turned off.

View Answer

Answer: C

Explanation:

The most likely reason the sa-web-01 VM dvfilter name is missing from the command output is that the sa-web-01 VM is powered off on the ESXi host. The dvfilter name is associated with the VM when it is powered on, and is removed when the VM is powered off. Therefore, if the VM is powered off, then the dvfilter name will not be visible in the command output. Other possible reasons could be that the ESXi host has the firewall turned off, the ESXi host has 5SH disabled, or that the sa-web-01 VM has no firewall rules configured.

References: [1] https://kb.vmware.com/s/article/2143718 [2] https://docs.vmware.com/en/VMware-NSX-T/3.0/vmware-nsx-t-30-administration-guide/GUID-AC3CC8A3-B2DE-4A53-8F09-B8EEE3E3C7D1.html

A security administrator is verifying the health status of an NSX Service Instance.

Which two parameters must be functioning for the health status to show as Up? (Choose two.)
A . VMs must have at least one vNIC.
B. VMs must not have existing endpoint protection rules.
C. VMs must have virtual hardware version 9 or higher.
D. VMs must be available on the host.
E. VMs must be powered on.

View Answer

Answer: D,E

Explanation:

The health status of an NSX Service Instance is an indicator of the overall health and functionality of the service.

For an NSX Service Instance to show as Up, the following two parameters must be functioning:

D. VMs must be available on the host – The VMs that are associated with the service must be present on the host and able to communicate with the NSX Manager. If a VM is not available on the host, the service will not be able to function properly.

E. VMs must be powered on – The VMs that are associated with the service must be powered on and running. If a VM is not powered on, the service will not be able to function properly.

An administrator has enabled the "logging" option on a specific firewall rule. The administrator does not see messages on the Logging Server related to this firewall rule.

What could be causing the issue?
A . The logging on the firewall policy needs to be enabled.
B. Firewall Rule Logging is only supported in Gateway Firewalls.
C. NSX Manager must have Firewall Logging enabled.
D. The logging server on the transport nodes is not configured.

View Answer

Answer: A

Refer to the exhibit.

An administrator is reviewing NSX Intelligence information as shown in the exhibit.

What does the red dashed line for the UDP: 137 flow represent?
A . Discovered communication
B. Allowed communication
C. Blocked communication
D. Unprotected communication

View Answer

Answer: C

Explanation:

The red dashed line for the UDP:137 flow in the NSX Intelligence information represents blocked communication. This indicates that the NSX Distributed Firewall has blocked the communication between the source and destination IP addresses on port 137. For more information on NSX Intelligence and how to use it, please refer to the NSX-T Data Center documentation: https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/nsx-t-3.0-intelligence/GUID-C2B2AF2E-A76A-46B8-A67A-42D7A9E924A9.html

An NSX administrator has been tasked with deploying a NSX Edge Virtual machine through an ISO image.

Which virtual network interface card (vNIC) type must be selected while creating the NSX Edge VM allow participation in overlay and VLAN transport zones?
A . e1000
B. VMXNET2
C. VMXNET3
D. Flexible

View Answer

Answer: C

Explanation:

When deploying an NSX Edge Virtual Machine through an ISO image, the virtual network interface card (vNIC) type that must be selected is VMXNET3 in order to allow participation in overlay and VLAN transport zones. VMXNET3 is a high-performance and feature-rich paravirtualized NIC that provides a significant performance boost over other vNIC types, as well as support for both overlay and VLAN transport zones.

For more information on deploying an NSX Edge Virtual Machine through an ISO image, please refer to the NSX-T Data Center documentation: https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/nsx-t-3.0-deploy-config/GUID-A782558B-A72B-4848-B6DB-7A8A9E71FFD6.html

Which are two use-cases for the NSX Distributed Firewall'(Choose two.)
A . Zero-Trust with segmentation
B. Security Analytics
C. Lateral Movement of Attacks prevention
D. Software defined networking
E. Network Visualization

View Answer

Answer: A,C

Explanation:

Zero-Trust with segmentation is a security strategy that uses micro-segmentation to protect a network from malicious actors. By breaking down the network into smaller segments, the NSX Distributed Firewall can create a zero-trust architecture which limits access to only users and devices that have been authorized. This reduces the risk of a malicious actor gaining access to sensitive data and systems.

Lateral Movement of Attacks prevention is another use-case for the NSX Distributed Firewall. Lateral movement of attacks are when an attacker is already inside the network and attempts to move laterally between systems. The NSX Distributed Firewall can help protect the network from these attacks by controlling the flow of traffic between systems and preventing unauthorized access.

References: https://www.vmware.com/products/nsx/distributed-firewall.html https://searchsecurity.techtarget.com/definition/zero-trust-network

Which two statements are true about IDS/IPS signatures? (Choose two.)
A . Users can upload their own IDS signature definitions from the NSX UI.
B. IDS Signatures can be High Risk, Suspicious, Low Risk and Trustworthy.
C. Users can create their own IDS signature definitions from the NSX UI.
D. An IDS signature contains data used to identify known exploits and vulnerabilities.
E. An IDS signature contains a set of instructions that determine which traffic is analyzed.

View Answer

Answer: D,E

Explanation:

(https://pubs.vmware.com/NSX-T-Data-Center/index.html#com.vmware.nsxt.admin.doc/GUID-AFAF58DB-E661-4A7D-A8C9-70A3F3A3A3D3.html)