Juniper JN0-683 Practice Test - Questions Answers, Page 7

Understanding Unnumbered BGP:

Unnumbered BGP (Border Gateway Protocol) allows BGP peering between routers without assigning specific IP addresses to the interfaces. Instead, it uses the loopback address or another router identifier for the BGP session, making IP address management more straightforward in large-scale networks.

Family inet Configuration:

Option C: The family inet configuration is required on each interface involved in unnumbered BGP peering to support IPv4 address families. This ensures that IPv4 peering sessions can be established between devices.

Automatic IPv4 Peering:

Option D: Unnumbered BGP peering automatically provisions IPv4 peering sessions. This simplifies the configuration by eliminating the need to manually assign and manage IP addresses for BGP peering.

Conclusion:

Option C: Correct---Unnumbered BGP requires the family inet configuration for IPv4.

Option D: Correct---Unnumbered BGP automatically provisions IPv4 peering, simplifying setup.

VXLAN Group-Based Policies (GBP):

VXLAN Group-Based Policies are used to apply security policies consistently across the network. These policies are often tied to user or device identities rather than static IP addresses, which allows for more dynamic and scalable security management.

Scalable Group Tags via RADIUS and 802.1X:

Option B: VXLAN GBP can use scalable group tags configured on a RADIUS server, which are then pushed to network devices through 802.1X. This allows for centralized and automated policy application based on user or device identity.

Consistent Security Policy Application:

Option C: GBP ensures that security policies are consistently applied across the network, regardless of where a user or device connects. This consistency is crucial in environments where security policies must follow the user or device.

Conclusion:

Option B: Correct---Group tags can be configured on a RADIUS server and pushed via 802.1X, enabling centralized policy management.

Option C: Correct---GBP ensures consistent application of security policies, which is essential for maintaining security across a dynamic network environment.

Understanding EBGP in an IP Fabric:

EBGP (External Border Gateway Protocol) is commonly used in IP fabrics to establish peering between routers, such as leaf and spine nodes, without relying on an Interior Gateway Protocol (IGP) like OSPF or IS-IS.

IGP Requirement for EBGP:

Option B: EBGP peering does not require an IGP for adjacency establishment. This is because EBGP peers are typically directly connected, and BGP establishes its own sessions without needing an underlying IGP.

Leaf-to-Spine Peering:

Option C: In a typical IP fabric, each leaf node establishes an EBGP session with every spine node. This ensures full connectivity between leaves and spines, facilitating efficient routing and forwarding within the fabric.

Conclusion:

Option B: Correct---EBGP does not require an IGP for establishing peering sessions.

Option C: Correct---Each leaf node peers with every spine node, which is a standard practice in IP fabrics to ensure connectivity and redundancy.

Type 2 EVPN Routes:

Type 2 routes advertise MAC addresses within an EVPN instance and are used primarily for Layer 2 bridging. These routes do not require a VXLAN tunnel to the protocol next hop because they operate within the same Layer 2 domain.

Type 5 EVPN Routes:

Type 5 routes are used to advertise IP prefixes (Layer 3 routes) within EVPN. Similar to Type 2 routes, they do not require a VXLAN tunnel to the protocol next hop because they represent L3 routes, which are managed at the routing layer without the need for VXLAN encapsulation.

Conclusion:

Option B: Correct---Type 2 routes do not need a VXLAN tunnel to the next hop, as they are used for Layer 2.

Option D: Correct---Type 5 routes also do not need a VXLAN tunnel because they operate at Layer 3, handling IP prefixes.