Question 1easymatching
Full question →Match each IP service or protocol to its most accurate purpose.
Answer choices are not available in this preview. Open the full question page for the complete review.
easymatchingObjective-mapped
Match each IP service or protocol to its most accurate purpose.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is confusing the roles of DHCP and DNS because both involve IP addresses and network communication. Candidates may incorrectly think DHCP resolves domain names or that DNS assigns IP addresses. Another trap is mixing ARP with routing protocols, assuming ARP handles routing decisions rather than local address resolution. Misunderstanding NTP as a security protocol instead of a time synchronization service also leads to errors. These traps arise because all these services operate at different layers and solve distinct network problems, so recognizing their unique purposes is critical for CCNA success.
Technical deep dive
How to think about this question
Dynamic Host Configuration Protocol (DHCP) automates the assignment of IP addresses and other network configuration parameters such as subnet mask, default gateway, and DNS servers to client devices. This service reduces manual configuration errors and simplifies network management, especially in large networks. DHCP operates at the application layer and uses UDP ports 67 and 68 for communication between clients and servers. In Cisco environments, DHCP can be configured on routers or dedicated servers to provide centralized IP address management. Domain Name System (DNS) translates human-readable domain names into IP addresses, enabling users and devices to locate resources on the network or internet. DNS operates at the application layer and uses UDP port 53 for queries. Cisco devices rely on DNS to resolve hostnames for management and routing purposes. Understanding DNS is essential for troubleshooting name resolution issues and ensuring network connectivity. Address Resolution Protocol (ARP) resolves IPv4 addresses to MAC addresses within the same broadcast domain, enabling devices to communicate on the local Layer 2 network. ARP operates at the interface between Layer 2 and Layer 3, sending broadcast requests and receiving unicast replies. Network engineers must understand ARP to diagnose local connectivity problems. Network Time Protocol (NTP) synchronizes clocks across network devices, ensuring accurate timestamps for logs and security protocols. NTP operates over UDP port 123 and is critical for time-sensitive applications and coordinated network operations.
KKey Concepts to Remember
- DHCP dynamically assigns IP addresses and network configuration parameters to clients, reducing manual setup and preventing IP conflicts.
- DNS resolves domain names to IP addresses, enabling devices to locate resources using human-readable names instead of numeric addresses.
- ARP maps IPv4 addresses to MAC addresses within the local broadcast domain, facilitating Layer 2 communication between devices.
- NTP synchronizes device clocks across the network to ensure consistent timekeeping for logs, security, and protocol coordination.
- DHCP operates at the application layer using UDP ports 67 and 68 to communicate between clients and servers.
- DNS queries use UDP port 53 and are essential for hostname resolution in Cisco device management and routing.
- ARP sends broadcast requests on the local network to discover MAC addresses corresponding to IPv4 addresses.
- NTP uses UDP port 123 and is critical for maintaining accurate time across Cisco network devices and services.
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?
DHCP dynamically assigns IP addresses and network configuration parameters to clients, reducing manual setup and preventing IP conflicts.
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 DHCP and DNS because both involve IP addresses and network communication. Candidates may incorrectly think DHCP resolves domain names or that DNS assigns IP addresses. Another trap is mixing ARP with routing protocols, assuming ARP handles routing decisions rather than local address resolution. Misunderstanding NTP as a security protocol instead of a time synchronization service also leads to errors. These traps arise because all these services operate at different layers and solve distinct network problems, so recognizing their unique purposes is critical for CCNA success.
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.