Cisco Enterprise Networking Mastery v3.1:
Advanced Certification Practice Exam a well
detailed exam 2025/2026 graded A+ upgraded !!!
150 Multiple-Choice Questions | Advanced / Mixed
Difficulty | For CCNP/CCIE Candidates
SECTION 1: NETWORK FUNDAMENTALS & ARCHITECTURE (Questions 1–10)
Question 1
A network architect is designing a greenfield campus network and must choose between
traditional hierarchical design and SD-Access fabric architecture. Which statement correctly
describes a fundamental architectural difference between these approaches?
A) Traditional hierarchical networks use LISP for control plane, while SD-Access uses IS-IS
B) SD-Access replaces legacy STP and VLAN sprawl with LISP/VXLAN overlays
C) Traditional networks use VXLAN encapsulation, while SD-Access uses MPLS
D) SD-Access requires manual CLI configuration on every fabric edge node
Correct Answer: B
Rationale: SD-Access fundamentally replaces traditional spanning-tree-based Layer 2 designs
with LISP/VXLAN overlay fabrics. This eliminates STP loops and VLAN sprawl while providing
policy-based automation. Traditional networks do not use LISP for control plane, SD-Access does
not use MPLS encapsulation, and SD-Access is primarily configured through DNA Center, not
manual CLI.
Question 2
An engineer is troubleshooting an application where clients intermittently fail to establish TCP
connections to a server. Packet captures show that TCP SYN packets are being sent but SYN-
,ACKs are not returned. The engineer verifies that the server is reachable via ICMP. At which OSI
layer does the problem most likely reside?
A) Layer 3 – Network
B) Layer 4 – Transport
C) Layer 5 – Session
D) Layer 7 – Application
Correct Answer: B
Rationale: Since ICMP (Layer 3) is working, the network layer is functional. The issue is at the
Transport layer (Layer 4) where TCP operates. Possible causes include TCP SYN flood protection,
TCP window scaling issues, or firewall rules that selectively drop TCP SYN-ACKs while allowing
ICMP. Session layer issues would manifest differently, and application layer problems would
occur after connection establishment.
Question 3
In a Cisco SD-WAN deployment, the WAN Edge router establishes secure DTLS/TLS control
connections to which controllers before any data traffic is allowed?
A) vSmart, vBond, and vManage only
B) vSmart and vBond only
C) vManage and vBond only
D) vSmart, vBond, vManage, and all other WAN Edges
Correct Answer: A
Rationale: Each WAN Edge device must first establish secure DTLS/TLS control-plane sessions
with vManage, vBond, and vSmart controllers. All control connections are authenticated using
X.509 certificates, ensuring trust before any data traffic is allowed. Connections to other WAN
Edges are data-plane tunnels established after control plane connectivity is verified.
Question 4
Which PDU is correctly associated with its OSI layer when troubleshooting a Cisco network?
A) Frame – Layer 3 (Network)
B) Segment – Layer 4 (Transport)
C) Packet – Layer 2 (Data Link)
D) Bit – Layer 5 (Session)
,Correct Answer: B
Rationale: The Transport layer (Layer 4) PDU is called a segment (TCP) or datagram (UDP).
Frames are Layer 2, packets are Layer 3, and bits are Layer 1. Understanding PDU naming
conventions is essential for systematic troubleshooting in Cisco environments.
Question 5
A network engineer is deploying IPv6 in an enterprise network. Which statement correctly
describes the relationship between IPv6 Link-Local addresses and Neighbor Discovery Protocol
(NDP)?
A) Link-Local addresses are used exclusively for NDP to replace ARP
B) NDP uses Link-Local addresses for neighbor discovery, router discovery, and address
resolution
C) Link-Local addresses are globally routable and require no NDP
D) NDP only operates with Global Unicast Addresses
Correct Answer: B
Rationale: IPv6 uses Neighbor Discovery Protocol (NDP), which is part of ICMPv6, to perform
functions including address resolution (replacing ARP), router discovery, and neighbor
unreachability detection. NDP operations use IPv6 Link-Local addresses (FE80::/10) for
communication between neighbors on the same link. Link-Local addresses are not globally
routable.
Question 6
Which Cisco IOS command displays detailed information about active NETCONF sessions,
including session IDs and client IP addresses?
A) show netconf session
B) show netconf sessions
C) show netconf status
D) show netconf detail
Correct Answer: A
Rationale: The show netconf session command displays active NETCONF sessions on a Cisco
device, showing session IDs, state, and source/destination IPs. This is essential for monitoring
and troubleshooting NETCONF connections in automation deployments.
, Question 7
In the TCP/IP model, which layer is responsible for ensuring that data is delivered reliably, in
order, and without errors between endpoints?
A) Network Access Layer
B) Internet Layer
C) Transport Layer
D) Application Layer
Correct Answer: C
Rationale: The Transport layer in the TCP/IP model (equivalent to OSI Layer 4) provides end-to-
end reliability, flow control, sequencing, and error recovery. TCP operates at this layer and
manages segment sequencing, retransmission, and windowing. The Internet layer handles
routing, Network Access handles physical transmission, and Application handles user-facing
protocols.
Question 8
A network administrator is configuring a Cisco Catalyst switch and notices that the show mac
address-table command output shows numerous dynamic MAC addresses that are repeatedly
appearing and disappearing. What is the most likely cause?
A) The switch is experiencing a MAC flooding attack
B) The CAM table aging timer is set too low
C) There is a network loop causing MAC address flapping
D) The switch is operating in cut-through mode
Correct Answer: C
Rationale: MAC address flapping (addresses appearing and disappearing on different ports) is a
classic symptom of a network loop. When a loop exists, frames circulate and MAC addresses are
learned on multiple ports, causing the CAM table to constantly update. While MAC flooding
attacks could cause similar symptoms, they typically involve a rapid influx of frames with
different source MAC addresses.
Question 9
Which statement correctly describes the function of the TTL field in an IPv4 header when a
packet traverses multiple routers?
Advanced Certification Practice Exam a well
detailed exam 2025/2026 graded A+ upgraded !!!
150 Multiple-Choice Questions | Advanced / Mixed
Difficulty | For CCNP/CCIE Candidates
SECTION 1: NETWORK FUNDAMENTALS & ARCHITECTURE (Questions 1–10)
Question 1
A network architect is designing a greenfield campus network and must choose between
traditional hierarchical design and SD-Access fabric architecture. Which statement correctly
describes a fundamental architectural difference between these approaches?
A) Traditional hierarchical networks use LISP for control plane, while SD-Access uses IS-IS
B) SD-Access replaces legacy STP and VLAN sprawl with LISP/VXLAN overlays
C) Traditional networks use VXLAN encapsulation, while SD-Access uses MPLS
D) SD-Access requires manual CLI configuration on every fabric edge node
Correct Answer: B
Rationale: SD-Access fundamentally replaces traditional spanning-tree-based Layer 2 designs
with LISP/VXLAN overlay fabrics. This eliminates STP loops and VLAN sprawl while providing
policy-based automation. Traditional networks do not use LISP for control plane, SD-Access does
not use MPLS encapsulation, and SD-Access is primarily configured through DNA Center, not
manual CLI.
Question 2
An engineer is troubleshooting an application where clients intermittently fail to establish TCP
connections to a server. Packet captures show that TCP SYN packets are being sent but SYN-
,ACKs are not returned. The engineer verifies that the server is reachable via ICMP. At which OSI
layer does the problem most likely reside?
A) Layer 3 – Network
B) Layer 4 – Transport
C) Layer 5 – Session
D) Layer 7 – Application
Correct Answer: B
Rationale: Since ICMP (Layer 3) is working, the network layer is functional. The issue is at the
Transport layer (Layer 4) where TCP operates. Possible causes include TCP SYN flood protection,
TCP window scaling issues, or firewall rules that selectively drop TCP SYN-ACKs while allowing
ICMP. Session layer issues would manifest differently, and application layer problems would
occur after connection establishment.
Question 3
In a Cisco SD-WAN deployment, the WAN Edge router establishes secure DTLS/TLS control
connections to which controllers before any data traffic is allowed?
A) vSmart, vBond, and vManage only
B) vSmart and vBond only
C) vManage and vBond only
D) vSmart, vBond, vManage, and all other WAN Edges
Correct Answer: A
Rationale: Each WAN Edge device must first establish secure DTLS/TLS control-plane sessions
with vManage, vBond, and vSmart controllers. All control connections are authenticated using
X.509 certificates, ensuring trust before any data traffic is allowed. Connections to other WAN
Edges are data-plane tunnels established after control plane connectivity is verified.
Question 4
Which PDU is correctly associated with its OSI layer when troubleshooting a Cisco network?
A) Frame – Layer 3 (Network)
B) Segment – Layer 4 (Transport)
C) Packet – Layer 2 (Data Link)
D) Bit – Layer 5 (Session)
,Correct Answer: B
Rationale: The Transport layer (Layer 4) PDU is called a segment (TCP) or datagram (UDP).
Frames are Layer 2, packets are Layer 3, and bits are Layer 1. Understanding PDU naming
conventions is essential for systematic troubleshooting in Cisco environments.
Question 5
A network engineer is deploying IPv6 in an enterprise network. Which statement correctly
describes the relationship between IPv6 Link-Local addresses and Neighbor Discovery Protocol
(NDP)?
A) Link-Local addresses are used exclusively for NDP to replace ARP
B) NDP uses Link-Local addresses for neighbor discovery, router discovery, and address
resolution
C) Link-Local addresses are globally routable and require no NDP
D) NDP only operates with Global Unicast Addresses
Correct Answer: B
Rationale: IPv6 uses Neighbor Discovery Protocol (NDP), which is part of ICMPv6, to perform
functions including address resolution (replacing ARP), router discovery, and neighbor
unreachability detection. NDP operations use IPv6 Link-Local addresses (FE80::/10) for
communication between neighbors on the same link. Link-Local addresses are not globally
routable.
Question 6
Which Cisco IOS command displays detailed information about active NETCONF sessions,
including session IDs and client IP addresses?
A) show netconf session
B) show netconf sessions
C) show netconf status
D) show netconf detail
Correct Answer: A
Rationale: The show netconf session command displays active NETCONF sessions on a Cisco
device, showing session IDs, state, and source/destination IPs. This is essential for monitoring
and troubleshooting NETCONF connections in automation deployments.
, Question 7
In the TCP/IP model, which layer is responsible for ensuring that data is delivered reliably, in
order, and without errors between endpoints?
A) Network Access Layer
B) Internet Layer
C) Transport Layer
D) Application Layer
Correct Answer: C
Rationale: The Transport layer in the TCP/IP model (equivalent to OSI Layer 4) provides end-to-
end reliability, flow control, sequencing, and error recovery. TCP operates at this layer and
manages segment sequencing, retransmission, and windowing. The Internet layer handles
routing, Network Access handles physical transmission, and Application handles user-facing
protocols.
Question 8
A network administrator is configuring a Cisco Catalyst switch and notices that the show mac
address-table command output shows numerous dynamic MAC addresses that are repeatedly
appearing and disappearing. What is the most likely cause?
A) The switch is experiencing a MAC flooding attack
B) The CAM table aging timer is set too low
C) There is a network loop causing MAC address flapping
D) The switch is operating in cut-through mode
Correct Answer: C
Rationale: MAC address flapping (addresses appearing and disappearing on different ports) is a
classic symptom of a network loop. When a loop exists, frames circulate and MAC addresses are
learned on multiple ports, causing the CAM table to constantly update. While MAC flooding
attacks could cause similar symptoms, they typically involve a rapid influx of frames with
different source MAC addresses.
Question 9
Which statement correctly describes the function of the TTL field in an IPv4 header when a
packet traverses multiple routers?
