Question 1mediummatching
Full question →Match each symptom to the first service area most likely involved.
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mediummatchingObjective-mapped
Match each symptom to the first service area most likely involved.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is confusing DHCP and DNS symptoms because both affect connectivity but in different ways. Candidates often assume that failure to reach a hostname means DHCP is at fault, but DHCP only assigns IP addresses, not name resolution. Another trap is overlooking NTP issues when timestamps are inconsistent, mistakenly blaming device hardware or software. Misinterpreting missing centralized logs as a connectivity problem rather than a Syslog configuration error also leads to wrong conclusions. Recognizing the distinct symptoms tied to each IP service is crucial to avoid these pitfalls.
Technical deep dive
How to think about this question
DNS (Domain Name System) is a critical IP service that translates human-readable domain names into IP addresses. In Cisco networks, DNS enables devices to resolve hostnames for management and routing purposes. When a device can ping an IP address but cannot resolve a hostname, it indicates that DNS is not functioning correctly. This symptom directs troubleshooting efforts to DNS server configuration, forwarding, or ACLs blocking DNS traffic. DHCP (Dynamic Host Configuration Protocol) automates IP address assignment and network configuration parameters like subnet mask and default gateway. If devices fail to receive automatic addressing, they cannot communicate properly on the network. Troubleshooting DHCP involves verifying DHCP server availability, scope configuration, and relay agent settings. NTP (Network Time Protocol) ensures synchronized clocks across network devices, which is essential for accurate logging and security. Misaligned timestamps indicate NTP synchronization issues, often caused by incorrect NTP server settings or network connectivity problems. Syslog centralizes logging from multiple devices to a central server, facilitating event monitoring and troubleshooting. Missing centralized event visibility usually means Syslog messages are not reaching the server due to misconfiguration or network filtering. The exam trap is confusing symptoms that affect connectivity with those related to IP services. For example, failing to distinguish between DHCP and DNS issues can lead to incorrect troubleshooting steps. Understanding the specific role and symptoms of each IP service helps avoid this mistake and improves first-pass troubleshooting accuracy.
KKey Concepts to Remember
- DNS resolves domain names to IP addresses and is the first service to check when name resolution fails but IP connectivity works.
- DHCP automatically assigns IP addresses and related network configuration parameters, so missing automatic addressing indicates a DHCP issue.
- NTP synchronizes device clocks across the network, and misaligned timestamps typically point to NTP service problems.
- Syslog centralizes event logging from multiple devices, so missing centralized event visibility suggests a Syslog configuration or service failure.
- Troubleshooting IP services requires linking symptoms directly to the service domain, such as DNS, DHCP, NTP, or Syslog, to isolate issues efficiently.
- Cisco devices rely on DNS for hostname resolution, so failure to resolve hostnames but successful IP pings confirms DNS as the problem domain.
- DHCP failures prevent devices from obtaining IP addresses dynamically, causing connectivity issues that manual IP configuration can temporarily bypass.
- NTP misconfigurations cause inconsistent timestamps, which can affect log correlation and security event analysis across Cisco network devices.
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?
DNS resolves domain names to IP addresses and is the first service to check when name resolution fails but IP connectivity works.
What exam trap should I watch out for?
Common exam trap: answer the scenario, not the keyword: A common exam trap is confusing DHCP and DNS symptoms because both affect connectivity but in different ways. Candidates often assume that failure to reach a hostname means DHCP is at fault, but DHCP only assigns IP addresses, not name resolution. Another trap is overlooking NTP issues when timestamps are inconsistent, mistakenly blaming device hardware or software. Misinterpreting missing centralized logs as a connectivity problem rather than a Syslog configuration error also leads to wrong conclusions. Recognizing the distinct symptoms tied to each IP service is crucial 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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