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100+ Free Extreme Fabric (Fabric Connect) Practice Questions

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In IP multicast over Fabric Connect, what is the role of a scope I-SID?

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2026 Statistics

Key Facts: Extreme Fabric (Fabric Connect) Exam

75%

Passing Score

Extreme Networks (Extreme Academy)

3 years

Certification Validity

Extreme Networks

$395

Retake Fee per Attempt

Extreme Networks

ProctorU

Independent Proctor

Extreme Academy

MCQ + Lab

Two-Part Format

Extreme Networks

802.1aq SPB

Underlying Technology

IEEE / Extreme Fabric Connect

The Extreme Certified Professional - Extreme Fabric (Fabric Connect) credential is issued by Extreme Networks (Extreme Academy) and proctored by ProctorU. It is a two-part assessment: a multiple-choice knowledge exam (about an hour) requiring 75% to pass, followed by a practical lab. One attempt is usually included in the course fee, with retakes at $395, and the certification is valid for 3 years. Extreme does not publish a fixed question count or domain weighting; this free bank evenly covers four areas: Installation and Configuration, Advanced Configuration, Management, and Troubleshooting of SPB/IS-IS, I-SID, L2/L3 VSN, Fabric Attach, auto-sense, multicast, and CFM.

Sample Extreme Fabric (Fabric Connect) Practice Questions

Try these sample questions to test your Extreme Fabric (Fabric Connect) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Extreme Fabric Connect is built on which IEEE standard for the network virtualization control plane?
A.IEEE 802.3ad Link Aggregation
B.IEEE 802.1Q VLAN tagging
C.IEEE 802.1aq Shortest Path Bridging (SPB)
D.IEEE 802.1D Spanning Tree Protocol
Explanation: Fabric Connect is Extreme's implementation of IEEE 802.1aq Shortest Path Bridging (SPB), specifically the MAC mode (SPBM). SPB replaces spanning tree with an IS-IS link-state control plane that computes shortest paths to every node, enabling an active-active multipath fabric.
2Which control-plane protocol does SPBM use to discover the topology and compute shortest paths between fabric nodes?
A.RIP
B.OSPF
C.BGP
D.IS-IS
Explanation: SPBM uses IS-IS as its link-state routing protocol. IS-IS advertises B-MAC reachability and I-SID membership across the fabric and computes the shortest path to every backbone node, populating the forwarding tables without spanning tree.
3In SPBM, what does the I-SID (Service Instance Identifier) primarily accomplish?
A.It sets the QoS DSCP marking for backbone traffic
B.It uniquely identifies a virtualized service instance independent of the underlying infrastructure
C.It assigns the IS-IS system ID to each backbone node
D.It defines the spanning-tree priority of an access port
Explanation: The I-SID is a 24-bit service identifier that separates a service from the infrastructure. Each L2 VSN, L3 VSN, or multicast stream is bound to an I-SID, so any node configured with the same I-SID participates in the same service network-wide.
4What encapsulation does SPBM use to forward customer frames across the backbone?
A.IEEE 802.1ah Provider Backbone Bridging (MAC-in-MAC)
B.GRE tunneling
C.VXLAN UDP encapsulation
D.MPLS label stacking
Explanation: SPBM uses IEEE 802.1ah Provider Backbone Bridging (PBB), commonly called MAC-in-MAC. The customer MAC (C-MAC) frame is encapsulated inside a backbone MAC (B-MAC) header with a B-MAC destination and source plus the I-SID, hiding customer addresses from the core.
5By default, which value becomes the SPBM B-MAC (backbone MAC) of a Fabric Connect switch?
A.The IS-IS area address
B.The management interface IP address
C.The chassis MAC address
D.A randomly generated multicast MAC
Explanation: By default the chassis MAC address becomes the node's B-MAC. While this works, Extreme recommends configuring an easy-to-recognize B-MAC so that fabric forwarding tables and troubleshooting output are readable. IS-IS computes the shortest path to every node's B-MAC.
6What is the correct format of an SPBM nickname?
A.A 32-bit dotted-decimal IP address
B.A 16-character hexadecimal string
C.A 48-bit MAC address such as 00:11:22:33:44:55
D.A dotted value in the form x.xx.xx (for example 2.34.56)
Explanation: The SPBM nickname uses the format x.xx.xx (for example 2.34.56). The nickname is a 20-bit value that uniquely identifies the node in the fabric and is used to build the per-source multicast forwarding state for IP multicast over Fabric Connect.
7What are B-VLANs (Backbone VLANs) used for in an SPBM fabric?
A.To provide out-of-band console access
B.To carry customer untagged management traffic
C.To act as the transport instances that carry encapsulated backbone traffic
D.To define the access ports for end-user devices
Explanation: B-VLANs are the SPBM transport instances. Fabric Connect uses two B-VLANs (commonly 4051 and 4052 by default) that carry the MAC-in-MAC encapsulated traffic. IS-IS automatically populates B-VLAN membership; ports are not added to a B-VLAN manually.
8How many B-VLANs does a standard Fabric Connect (SPBM) deployment use, and why?
A.Eight B-VLANs to match the eight QoS queues
B.One B-VLAN to keep configuration simple
C.Two B-VLANs to provide ECMP-style load distribution across equal-cost paths
D.Four B-VLANs, one per access switch
Explanation: SPBM typically uses two B-VLANs (for example 4051 and 4052). Using two transport instances lets the fabric distribute traffic across equal-cost shortest paths, providing load balancing and additional resiliency without spanning tree blocking links.
9In a Fabric Connect network, where must IS-IS adjacencies form to build the SPB core?
A.On the NNI core-facing links between fabric nodes
B.On the out-of-band management ports
C.Only on the seed node's loopback
D.On the UNI access ports facing end users
Explanation: SPB IS-IS interfaces are enabled on the NNI (network-to-network interface) core-facing links between fabric nodes. IS-IS adjacencies form across those links to discover the topology, while UNI ports face the customer edge and carry untagged or tagged service traffic.
10What is the default primary and secondary B-VLAN pair on Extreme Fabric Engine/VOSS switches?
A.VLAN 4051 and VLAN 4052
B.VLAN 100 and VLAN 200
C.VLAN 4094 and VLAN 4093
D.VLAN 1 and VLAN 2
Explanation: The default backbone VLANs used by SPBM are 4051 (primary) and 4052 (secondary). These reserved high VLAN IDs carry the MAC-in-MAC backbone traffic, and the two instances let the fabric load-balance across equal-cost paths.

About the Extreme Fabric (Fabric Connect) Practice Questions

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