hardMultiple Select
300-410 Practice Question: Which TWO statements about the 'ip domain-lookup'…
Which TWO statements about the 'ip domain-lookup' and DNS configuration on a Cisco IOS router are true? (Choose TWO.)
⚠ Common exam trap
Many exam-takers assume 'ip domain-lookup' is disabled by default (Option A) because they recall it must be explicitly enabled for certain features, but in fact it is enabled by default on most IOS versions.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The 'ip name-server' command can specify up to six DNS servers.
Option B is correct because the 'ip name-server' command on Cisco IOS accepts up to six DNS server addresses, allowing the router to query multiple name servers for resolution. Option C is correct because 'ip domain-list' appends additional domain suffixes to the DNS search list, so unqualified hostnames are tried against each listed domain in order. Option A is wrong because 'ip domain-lookup' is enabled by default on Cisco IOS routers, not disabled. Option D is wrong because 'ip host' creates static host entries that are not overwritten by DNS servers. Option E is wrong because 'show hosts' displays both static and dynamically learned host entries, not only static ones.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The 'ip domain-lookup' command is disabled by default on Cisco IOS routers.
Why it's wrong here
Cisco IOS enables domain lookup by default, so name resolution is attempted unless explicitly disabled with 'no ip domain-lookup'. The statement is tempting because administrators frequently disable it to stop mistyped commands triggering slow DNS queries, which is a real operational practise but not the default behaviour.
- ✓
The 'ip name-server' command can specify up to six DNS servers.
Why this is correct
Cisco IOS permits a maximum of six name servers via repeated 'ip name-server' entries, satisfying the stem's DNS configuration constraint. This hard limit governs how many resolvers the router queries for domain-name resolution when 'ip domain-lookup' is enabled, so the statement is factually accurate.
- ✓
The 'ip domain-list' command adds a domain suffix to the search list for DNS queries.
Why this is correct
The 'ip domain-list' command appends suffixes to the DNS search list, letting the router resolve unqualified hostnames by trying each domain in turn. Unlike 'ip domain-name', which sets a single default, domain-list supports multiple entries, satisfying the requirement for a search list of DNS suffixes.
- ✗
The 'ip host' command creates a dynamic DNS entry that can be overwritten by a DNS server.
Why it's wrong here
'ip host' builds a static local host table entry that persists in the running configuration and is not overwritten by DNS responses. It is tempting because dynamic DNS resolution does update cached mappings, and that behaviour applies to the resolver cache, not to manually configured static host entries.
- ✗
The 'show hosts' command displays only statically configured host entries.
Why it's wrong here
'show hosts' lists both static 'ip host' entries and dynamically learned DNS entries, so claiming static-only is false. It is tempting because static mappings are configured manually and appear in that table, but the display also includes names resolved through 'ip name-server' when 'ip domain-lookup' is enabled.
Visual reference
About these practice questions
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.