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350-401 · topic practice

Infrastructure practice questions

Use this page to practise Infrastructure questions for this certification. Focus on how the exam tests infrastructure in scenario format — understanding the why behind each answer builds more durable knowledge than memorising options.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security
20 questionsDomain: Infrastructure
Practice 10 questionsBrowse domain →

What the exam tests

What to know about Infrastructure

Infrastructure questions on this certification test your ability to deploy and manage infrastructure concepts in scenario-based situations.

Core Infrastructure concepts and how they apply in real-world cloud scenarios.

How to deploy infrastructure correctly and verify the outcome.

Troubleshooting infrastructure issues by interpreting error output and system state.

Cloud best practices and Infrastructure design trade-offs tested by this certification.

Watch out for

Common Infrastructure exam traps

  • ▸Selecting the most expensive service when a simpler managed option meets the requirement.
  • ▸Forgetting that cloud resources must be explicitly secured — defaults are rarely secure.
  • ▸Choosing a global service fix when the issue is region-specific.
  • ▸Overlooking cost implications of cross-region data transfer in architecture questions.

Practice set

Infrastructure questions

20 questions · select your answer, then reveal the explanation

Question 1mediummultiple choice
Study the full EIGRP explanation →

A network engineer is troubleshooting an EIGRP adjacency issue between two routers. The engineer verifies that both routers have the same K-values and autonomous system number. However, the adjacency does not form. Which configuration issue is most likely the cause?

Question 2hardmultiple choice
Study the full QoS explanation →

A company is implementing QoS in a campus network. Voice traffic must be prioritized over data traffic, and all traffic should be marked at Layer 2 and Layer 3. Which combination of marking values should be used on access ports to achieve this?

Question 3easymultiple choice
Open the full VLAN trunking answer →

An engineer needs to configure a switchport to carry traffic for multiple VLANs to a router using a single physical link. Which configuration should be applied on the switchport?

Question 4mediummultiple choice
Read the full wireless explanation →

A network engineer is deploying a new WLAN and needs to ensure that client traffic is encrypted using AES with a pre-shared key. Which security configuration should be applied to the wireless SSID?

Question 5hardmultiple choice
Review the full OSPF breakdown →

A network administrator is troubleshooting an issue where OSPF routes are not being learned from a neighbor. The administrator checks the OSPF configuration and sees that both routers are in the same area. The neighbor state is stuck in EXSTART. What is the most likely cause?

Question 6easymultiple choice
Open the full VLAN trunking answer →

An engineer is configuring a new VLAN 100 on a switch. Which command must be used to create the VLAN?

Question 7mediummulti select
Open the full VLAN trunking answer →

A company has a requirement to provide redundancy for the default gateway on a subnet. Two switches are configured with HSRP. Which two interfaces on the switches must be in the same VLAN to form the HSRP group?

Question 8hardmultiple choice
Open the full BGP breakdown →

An engineer is troubleshooting a BGP routing issue. The router is not receiving routes from an eBGP neighbor. The neighbor is reachable via ping. The BGP session is established and in the Established state. What is the most likely cause?

Question 9easymultiple choice
Review the full routing breakdown →

A network administrator needs to allow SSH access to a router from the management network 192.168.1.0/24. Which configuration should be applied?

Question 10mediummulti select
Open the full VLAN trunking answer →

Which TWO actions are valid for configuring 802.1Q trunking on a Cisco switch? (Choose two.)

Question 11hardmulti select
Review the full OSPF breakdown →

Which THREE conditions are required for OSPF routers to become fully adjacent? (Choose three.)

Question 12easymulti select
Review the full routing breakdown →

Which TWO methods can be used to prevent unauthorized access to the privileged EXEC mode on a Cisco router? (Choose two.)

Question 13mediummultiple choice
Review the full OSPF breakdown →

Based on the exhibit, what is the role of R1 on this OSPF network?

Exhibit

Refer to the exhibit.

R1# show ip ospf interface GigabitEthernet0/0
GigabitEthernet0/0 is up, line protocol is up
  Internet Address 10.1.1.1/24, Area 0
  Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 1
  Transmit Delay is 1 sec, State BDR, Priority 1
  Designated Router (ID) 2.2.2.2, Interface address 10.1.1.2
  Backup Designated router (ID) 1.1.1.1, Interface address 10.1.1.1
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Question 14hardmultiple choice
Read the full Infrastructure explanation →

Based on the exhibit, which traffic will be permitted outbound on GigabitEthernet0/0?

Exhibit

Refer to the exhibit.

! Running-config on R1
ip access-list extended FILTER
 permit tcp 192.168.1.0 0.0.0.255 any eq www
 permit tcp 192.168.1.0 0.0.0.255 any eq https
!
interface GigabitEthernet0/0
 ip access-group FILTER out
!
Question 15mediummultiple choice
Open the full VLAN trunking answer →

A company has a campus network with two distribution switches (DSW1 and DSW2) connected via a Layer 2 trunk. Each distribution switch connects to two access switches. Spanning Tree Protocol (STP) is running with default settings. Recently, a network administrator added a new access switch (ASW3) and connected it to both distribution switches. After the connection, network performance degraded significantly, and users in VLAN 10 reported intermittent connectivity. The administrator checked the logs and saw multiple TCN notifications. What is the most likely cause of the issue?

Question 16hardmultiple choice
Open the full BGP breakdown →

A multinational organization has a BGP-based MPLS VPN network. The CE router at a branch office is connected to two PE routers (PE1 and PE2) in the service provider network. The branch uses eBGP to exchange routes with the PEs. The network administrator notices that the branch can reach some destinations but not others. The BGP table on the CE shows routes with next-hop set to the PE loopback addresses, but those loopbacks are not reachable. The CE has a default route pointing to the PEs. What is the most likely cause of the issue?

Question 17easymulti select
Read the full Infrastructure explanation →

Which TWO characteristics are true about the operation of Rapid PVST+? (Choose two.)

Question 18hardmultiple choice
Review the full OSPF breakdown →

Refer to the exhibit. R1 has two equal-cost OSPF E2 routes to 10.1.1.0/24 via two different next hops. However, when tracing to 10.1.1.1, all traffic uses the path through 10.0.1.2. What is the most likely reason?

Exhibit

Refer to the exhibit.
R1# show ip route | include 10.1.1.0
O E2 10.1.1.0/24 [110/20] via 10.0.1.2, 00:00:34, GigabitEthernet0/0
O E2 10.1.1.0/24 [110/20] via 10.0.2.2, 00:00:34, GigabitEthernet0/1
R1# show ip ospf interface GigabitEthernet0/0 | include Cost
  Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 10
R1# show ip ospf interface GigabitEthernet0/1 | include Cost
  Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 100
R1# traceroute 10.1.1.1 source Loopback0
Type escape sequence to abort.
Tracing the route to 10.1.1.1
  1 10.0.1.2 4 msec 4 msec 4 msec
  2 10.0.3.2 8 msec 8 msec 8 msec
Question 19mediummultiple choice
Open the full VLAN trunking answer →

Your company has a campus network with two distribution switches (DS1 and DS2) each connected to two access switches (AS1-AS4). All switches run Rapid PVST+. The root bridge for VLAN 10 is DS1. Recently, users on AS2 (VLAN 10) report intermittent connectivity. You notice that AS2's root port for VLAN 10 is flapping between two uplinks to DS1 and DS2. The link from AS2 to DS1 is a 1 Gbps fiber, and the link to DS2 is a 1 Gbps copper. The cost of both links is 4 (default for 1 Gbps). The network administrator previously configured PortFast on all access ports but did not configure any other spanning-tree parameters. Which action should you take to stabilize the topology?

Question 20mediumdrag order
Open the full VLAN trunking answer →

Drag and drop the steps to configure VLAN Trunking Protocol (VTP) on a Cisco switch in the correct order.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps
Order
1Step 1
2Step 2
3Step 3
4Step 4
5Step 5
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Focused Infrastructure sessions

Start a Infrastructure only practice session

Every question in these sessions is drawn from the Infrastructure domain — nothing else.

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Browse all Infrastructure questions →Mixed 350-401 session

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Practise 350-401 questions linked to BGP.

Frequently asked questions

What does the 350-401 exam test about Infrastructure?
Infrastructure questions on this certification test your ability to deploy and manage infrastructure concepts in scenario-based situations.
How should I use these practice questions?
Select your answer before revealing the explanation. Then read why each option is right or wrong — this active recall approach builds retention far faster than re-reading notes.
Can I practise just Infrastructure questions in a focused session?
Yes — the session launcher on this page draws every question from the Infrastructure domain. Use a 10-question session first to gauge your baseline, then move to 20 or 30 once the weak spots are clear.
Where can I practise other 350-401 topics?
Use the topic links above to move to related areas, or go back to the 350-401 question bank to see all topics.
Are these real exam questions or dumps?
These are original practice questions written to test the same concepts the 350-401 exam covers. They are not copied from any real exam or dump site.