Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
What is the main operational benefit of DNS for users and applications?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
It lets users and applications work with names instead of memorizing IP addresses.
This is correct because DNS provides human-friendly name resolution.
B
Distractor review
It automatically assigns default gateways.
This is wrong because gateway assignment is typically handled by DHCP or manual configuration.
C
Distractor review
It elects the OSPF designated router.
This is wrong because DNS is unrelated to OSPF election.
D
Distractor review
It removes the need for subnet masks.
This is wrong because subnet masks still define IP scope.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is selecting answers that confuse DNS with other network services like DHCP or routing protocols. For example, option B incorrectly states that DNS assigns default gateways, which is actually a DHCP function. Option C wrongly associates DNS with OSPF designated router election, a routing protocol process unrelated to name resolution. Option D suggests DNS removes the need for subnet masks, which is false because subnetting defines IP address scopes and is unrelated to DNS. Candidates must avoid conflating DNS’s role in name resolution with other network functions to answer correctly.
Technical deep dive
How to think about this question
The Domain Name System (DNS) is a fundamental IP service that translates human-readable domain names into IP addresses, enabling users and applications to access network resources without memorizing numeric IP addresses. DNS operates as a distributed database that stores mappings between domain names and their corresponding IP addresses, allowing seamless navigation across the internet and private networks. This name resolution process is essential because IP addresses are difficult for humans to remember, whereas domain names are intuitive and descriptive. In Cisco networking and the CCNA context, DNS is critical for simplifying network communication. When a user enters a URL or hostname, the DNS client queries a DNS server to resolve the name into an IP address. This process allows applications and devices to communicate using IP addresses transparently, while users interact with meaningful names. Cisco devices often rely on DNS for features like network management, remote access, and application connectivity, making DNS an indispensable service in IP networks. A common exam trap is confusing DNS with other network functions such as DHCP, OSPF, or subnetting. DNS does not assign IP addresses or manage routing protocols; instead, it strictly resolves names to IP addresses. Understanding this distinction is vital because selecting options related to gateway assignment or routing protocol election is incorrect. Practically, DNS improves usability and network efficiency by abstracting IP addresses behind user-friendly names, which is the core operational benefit tested in this question.
KKey Concepts to Remember
- DNS translates human-friendly domain names into IP addresses to simplify network communication for users and applications.
- Cisco devices use DNS to resolve hostnames during network management, remote access, and application connectivity.
- DNS operates as a distributed database that stores mappings between domain names and IP addresses across the internet and private networks.
- DNS does not assign IP addresses or default gateways; these functions are handled by DHCP or manual configuration.
- DNS is unrelated to routing protocol processes such as OSPF designated router election or subnet mask configuration.
- Users and applications rely on DNS to avoid memorizing numeric IP addresses, improving usability and reducing errors.
- DNS queries involve clients requesting name resolution from DNS servers, which respond with the corresponding IP address.
- Understanding DNS’s role in name resolution helps avoid common exam mistakes that confuse it with other IP 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.
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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 translates human-friendly domain names into IP addresses to simplify network communication for users and applications.
What is the correct answer to this question?
The correct answer is: It lets users and applications work with names instead of memorizing IP addresses. — The main benefit is that DNS allows users and applications to use names instead of memorizing raw IP addresses. In practical terms, people find names much easier to remember and work with. DNS creates that name-to-address translation layer while the network still uses IP addresses underneath. This is one of the most important usability benefits in everyday networking. The correct answer is the one centered on name resolution and human-friendly access.
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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