Practice Free JN0-481 Exam Online Questions
A network operator is provisioning a new tenant in a multi-tenant EVPN-VXLAN data center. The tenant requires two separate Layer 2 domains, VLAN 10 and VLAN 20. The operator needs to configure the VRF for this tenant.
What is the primary function of the Route Distinguisher (RD) in the VRF configuration?
routing-instances {
TENANT-C {
instance-type vrf;
interface irb.10;
interface irb.20;
route-distinguisher 10.1.1.1:300;
vrf-target target:65001:300;
}
}
- A . To make all IP prefixes within the VRF globally unique across the entire BGP fabric.
- B . To uniquely identify the VRF on the local switch for management purposes.
- C . To control which routes are imported into and exported from the VRF table.
- D . To map the VRF to a specific VXLAN Network Identifier (VNI).
A DevOps engineer is using Apstra to automate the deployment of a new data center fabric. The design requires consistent allocation of IP addresses for P2P links and loopbacks, as well as unique ASNs for each switch.
Which Apstra design component is used to manage the pools of these unique network identifiers to prevent conflicts and ensure consistency?
- A . Logical Devices
- B . Property Sets
- C . Tags
- D . Resources
A solution architect is designing the spine layer for a new fabric. The leaf layer consists of 64 switches, and each leaf has 4 x 100GbE uplinks. The architect wants to use spine switches that have 32 x 400GbE ports.
To achieve a 1:1 non-blocking fabric, what is the minimum number of 32-port spine switches required?
- A . 2
- B . 16
- C . 4
- D . 8
A cloud architect is migrating a legacy 3-tier data center to a modern EVPN-VXLAN fabric. The new design follows Juniper best practices, using a 3-stage spine-leaf Clos architecture.
What is the primary benefit of this migration in terms of traffic flow and application performance?
- A . It provides predictable, low-latency performance by ensuring all east-west traffic is only one hop away (leaf-spine-leaf).
- B . It reduces the number of physical switches required, lowering capital expenditure.
- C . It eliminates the need for an underlay routing protocol by using Layer 2 flooding.
- D . It centralizes all security policy enforcement on the spine switches.
A Juniper data center fabric has been successfully deployed and is running under Apstra management. A new security policy requires that all traffic between the web tier and the database tier, which are in different subnets but the same VRF, must be inspected by a firewall.
Following Juniper best practices for service insertion, how should this be implemented in Apstra?
- A . Connect the firewall to a border leaf switch and route all inter-subnet traffic out to the firewall and back into the fabric.
- B . Manually configure Policy-Based Routing (PBR) on all leaf switches to forward traffic to the firewall.
- C . Create a configlet to apply a firewall filter to the spine switches that redirects traffic to the firewall.
- D . Use Apstra’s service chaining capabilities to define the firewall as a service and insert it into the traffic path between the two virtual networks.
A NOC technician is verifying the operational state of an EVPN-VXLAN fabric. The technician needs to confirm the mapping between VLANs and their corresponding Virtual Network Identifiers (VNIs) on a leaf switch.
Which command would the technician use to display this information?
- A . `show route table evpn.0`
- B . `show vlans`
- C . `show evpn database`
- D . `show interfaces vtep`
A NOC technician is verifying the operational state of an EVPN-VXLAN fabric. The technician needs to confirm the mapping between VLANs and their corresponding Virtual Network Identifiers (VNIs) on a leaf switch.
Which command would the technician use to display this information?
- A . `show route table evpn.0`
- B . `show vlans`
- C . `show evpn database`
- D . `show interfaces vtep`
When designing an IP fabric’s underlay and overlay, what are the primary reasons for separating them into distinct routing and forwarding domains? (Select all that apply.)
- A . To allow the physical topology (underlay) to be simple and stable, while the virtual topology (overlay) can be complex and dynamic.
- B . To allow the underlay to be managed by a different team than the overlay services.
- C . To ensure that every switch in the fabric has a complete Layer 2 forwarding table for all VLANs.
- D . To enable the use of different routing protocols for the underlay (e.g., OSPF) and the overlay (e.g., BGP).
- E . To prevent host MAC addresses from being installed in the routing tables of the spine switches.
A systems administrator is reviewing the tabs at the top of the Apstra Blueprint UI.
Which of the following tabs represents the currently deployed and operational intended state of the network fabric?
- A . Staged
- B . Active
- C . Analytics
- D . Uncommitted
In a spine-leaf fabric, a leaf switch is connected to four spine switches. The underlay uses EBGP, and the leaf has learned a route to a remote VTEP’s loopback address from all four spines. The paths are all equal cost.
A traffic flow is initiated from a server connected to the local leaf to a server connected to the remote VTEP. The flow consists of multiple TCP sessions between the same source and destination IP addresses but with different source and destination ports.
How does Equal Cost Multi-Path (ECMP) load balancing typically distribute these TCP sessions across the four available paths to the spines?
- A . The sessions are distributed on a per-flow basis, but all sessions between the same two IP addresses will follow the same path.
- B . A hashing algorithm is used on the packet headers, and sessions with different port numbers will likely be hashed to different paths.
- C . All sessions are sent to the first available path.
- D . The sessions are distributed on a per-packet, round-robin basis.