Question 1easymatching
Full question →Match each basic networking service to its most accurate role.
Answer choices are not available in this preview. Open the full question page for the complete review.
easymatchingObjective-mapped
Match each basic networking service to its most accurate role.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is confusing the roles of DNS and DHCP services because both involve IP addressing concepts. Candidates might mistakenly think DHCP resolves hostnames like DNS, or that NTP provides addressing. This confusion leads to incorrect matching of services to their functions. Another trap is assuming Syslog is a security protocol rather than a centralized logging service, which can mislead troubleshooting scenarios. Understanding each service’s unique role prevents mixing their purposes during the exam.
Technical deep dive
How to think about this question
Basic networking services like DNS, DHCP, NTP, and Syslog are essential for network operation and management. DNS (Domain Name System) resolves human-readable hostnames into IP addresses, enabling devices to locate each other on the network. DHCP (Dynamic Host Configuration Protocol) automates IP address assignment, reducing manual configuration errors and simplifying network administration. NTP (Network Time Protocol) ensures all devices maintain synchronized clocks, which is critical for accurate logging and time-sensitive operations. Syslog centralizes event messages from network devices, facilitating monitoring and troubleshooting. Each service operates with distinct protocols and purposes. DNS uses UDP port 53 to respond to hostname queries, while DHCP uses UDP ports 67 and 68 to lease IP addresses dynamically. NTP communicates over UDP port 123 to synchronize time across devices, ensuring consistency in logs and security protocols. Syslog typically uses UDP port 514 to transmit log messages to a centralized server, enabling administrators to analyze network events efficiently. Understanding these protocols helps in recognizing symptoms related to each service during troubleshooting or exam scenarios. A frequent exam trap is mixing up these services due to overlapping concepts like addressing or logging. For example, confusing DHCP’s role in IP assignment with DNS’s role in name resolution can lead to incorrect answers. Similarly, overlooking the importance of NTP in time synchronization can cause misinterpretation of log timestamps. In practical Cisco networking, correctly identifying these services supports effective network design, troubleshooting, and security auditing, making their roles fundamental knowledge for the CCNA exam.
KKey Concepts to Remember
- DNS resolves human-readable hostnames into IP addresses, enabling devices to communicate using domain names instead of numeric IPs.
- DHCP dynamically assigns IP addresses and other network configuration parameters to devices, reducing manual configuration errors.
- NTP synchronizes the clocks of network devices to a common time source, ensuring accurate timestamps for logs and security protocols.
- Syslog centralizes event messages from multiple network devices, allowing administrators to monitor and troubleshoot network issues efficiently.
- DNS uses UDP port 53 to handle hostname resolution queries and responses within IP networks.
- DHCP operates using UDP ports 67 and 68 to lease IP addresses and configuration details to clients automatically.
- NTP communicates over UDP port 123 to maintain time synchronization across all network devices.
- Syslog transmits log messages typically over UDP port 514 to a centralized logging server for event correlation and analysis.
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.
Related practice questions
Related 200-301 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
CCNA subnetting practice questions
Practise IPv4 subnetting, CIDR, masks, host ranges and subnet selection.
CCNA OSPF practice questions
Practise OSPF neighbours, router IDs, metrics, areas and routing-table interpretation.
CCNA VLAN practice questions
Practise VLANs, access ports, trunks, allowed VLANs and switching scenarios.
CCNA STP practice questions
Practise spanning tree, root bridge election, port roles and STP troubleshooting.
CCNA EtherChannel practice questions
Practise LACP, PAgP, port-channel behaviour and bundle requirements.
CCNA ACL practice questions
Practise standard and extended ACLs, permit/deny logic and traffic filtering.
CCNA NAT practice questions
Practise static NAT, dynamic NAT, PAT and inside/outside address translation.
CCNA DHCP practice questions
Practise DHCP scopes, relay, leases and troubleshooting.
CCNA show ip route practice questions
Practise routing-table output, longest-prefix match, AD and route selection.
CCNA show interfaces trunk practice questions
Practise trunk verification and VLAN forwarding across switches.
CCNA wireless security practice questions
Practise WLAN security, authentication and wireless architecture concepts.
CCNA IPv6 practice questions
Practise IPv6 addressing, routes, neighbour discovery and common IPv6 exam traps.
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 human-readable hostnames into IP addresses, enabling devices to communicate using domain names instead of numeric IPs.
What exam trap should I watch out for?
Common exam trap: answer the scenario, not the keyword: A common exam trap is confusing the roles of DNS and DHCP services because both involve IP addressing concepts. Candidates might mistakenly think DHCP resolves hostnames like DNS, or that NTP provides addressing. This confusion leads to incorrect matching of services to their functions. Another trap is assuming Syslog is a security protocol rather than a centralized logging service, which can mislead troubleshooting scenarios. Understanding each service’s unique role prevents mixing their purposes during the exam.
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.
Discussion
Loading comments…
Sign in to join the discussion.