Question 1mediummatching
Full question →Match each security control idea to its most accurate purpose.
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mediummatchingObjective-mapped
Match each security control idea to its most accurate purpose.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is confusing the purpose of security controls by assuming they all protect the same asset or operate at the same network layer. For example, mistaking SSH as a general network encryption tool rather than specifically securing remote device management can lead to incorrect matching. Similarly, confusing BPDU Guard as a port security feature that limits MAC addresses rather than a spanning-tree protection mechanism can cause errors. Understanding each control’s specific role in Cisco network security is essential to avoid these pitfalls.
Technical deep dive
How to think about this question
Security controls in Cisco networks are designed to protect different aspects of network infrastructure and data integrity. Least privilege is a fundamental security principle that restricts user or device access strictly to what is necessary for their role, minimizing potential attack surfaces. SSH (Secure Shell) provides encrypted remote access to network devices, ensuring that administrative sessions are secure against eavesdropping and interception. BPDU Guard is a spanning-tree protocol security feature that disables ports receiving unexpected Bridge Protocol Data Units (BPDUs), protecting the network topology from unauthorized switches or loops. Port security limits the number of MAC addresses learned on a switch port, preventing unauthorized devices from connecting and reducing the risk of MAC flooding attacks. Each security control targets a specific network risk or vulnerability. Least privilege controls access rights at the user or device level, enforcing strict permissions. SSH secures remote management by encrypting traffic between administrators and devices, preventing credential theft. BPDU Guard protects the spanning-tree topology by shutting down ports that receive BPDUs unexpectedly, which could indicate a misconfiguration or attack. Port security restricts MAC address learning on switch ports, limiting the devices that can connect and preventing MAC address spoofing or flooding attacks that could disrupt switching. A frequent exam trap is assuming all security controls serve the same purpose or apply universally across the network. For example, confusing BPDU Guard with port security leads to misidentifying which control protects spanning-tree versus MAC address learning. Similarly, thinking SSH protects all network traffic rather than just remote management sessions causes errors. Understanding the distinct scope and behavior of each control in Cisco environments helps avoid these mistakes and ensures accurate application of security principles in the CCNA exam context.
KKey Concepts to Remember
- Least privilege enforces that users and devices have only the minimum access necessary to perform their functions, reducing security risks.
- SSH encrypts remote administrative sessions to Cisco devices, protecting credentials and commands from interception on untrusted networks.
- BPDU Guard disables switch ports that receive unexpected Bridge Protocol Data Units, preventing unauthorized switches from affecting spanning-tree topology.
- Port security limits the number of MAC addresses learned on a switch port, blocking unauthorized devices and mitigating MAC flooding attacks.
- Security controls in Cisco networks are specialized and must be matched to the specific network risk or asset they protect for effective defense.
- Understanding the distinct function of each security control helps avoid common exam mistakes related to misapplying protections.
- Cisco’s spanning-tree protocol relies on BPDU Guard to maintain topology integrity by preventing rogue switches from participating.
- Port security is a Layer 2 control that directly limits device access by controlling MAC address learning on switch ports.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
Least privilege enforces that users and devices have only the minimum access necessary to perform their functions, reducing security risks.
What exam trap should I watch out for?
Common exam trap: answer the scenario, not the keyword: A common exam trap is confusing the purpose of security controls by assuming they all protect the same asset or operate at the same network layer. For example, mistaking SSH as a general network encryption tool rather than specifically securing remote device management can lead to incorrect matching. Similarly, confusing BPDU Guard as a port security feature that limits MAC addresses rather than a spanning-tree protection mechanism can cause errors. Understanding each control’s specific role in Cisco network security is essential to avoid these pitfalls.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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