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Exam Code: 010-160

Exam Name Linux Essentials Certificate Exam, version 1.6

Certification Provider: LPI

Corresponding Certification: Linux Essentials

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LPI 010-160 Practice Test 49

Question 480

A lab machine must resolve a specified internal hostname to a fixed address without querying DNS. One student proposes Add the mapping to /etc/hosts with appropriate privileges and another proposes Run host example.org. Which technical comparison is the soundest?

  1. Run host example.org is more directly suited to local hostname override than Add the mapping to /etc/hosts with appropriate privileges, regardless of the stated constraint.
  2. The two actions are interchangeable for local hostname override and necessarily have the same main result.
  3. Add the mapping to /etc/hosts with appropriate privileges is used because The hosts file provides local static hostname-to-address mappings in normal name-service configurations. The alternative Run host example.org addresses DNS record lookup instead.
  4. Run ss -tln is the only useful action for local hostname override; Add the mapping to /etc/hosts with appropriate privileges has no relevant effect.

Explanation

Correct Answer

C:

Correct distinction: Add the mapping to /etc/hosts with appropriate privileges targets local hostname override; The hosts file provides local static hostname-to-address mappings in normal name-service configurations. The compared alternative instead serves DNS record lookup.

Incorrect Answers

A:

Incorrect mapping: Run host example.org is used for DNS record lookup. It does not displace Add the mapping to /etc/hosts with appropriate privileges for the described requirement.

B:

The mechanisms are different: The hosts file provides local static hostname-to-address mappings in normal name-service configurations. By contrast, host performs DNS lookups and displays the returned resource records. They are not universally interchangeable.

D:

The third option addresses listening TCP sockets: ss lists TCP sockets and -l restricts the display to listening sockets. The original action remains relevant because The hosts file provides local static hostname-to-address mappings in normal name-service configurations.

Question 481

A technician wants a basic ICMP echo probe to assess IP reachability to a known host. Which action most directly addresses this requirement on a Linux-related system?

  1. Run ping -c 4 target.example
  2. Run host example.org
  3. Run ss -tln
  4. Identify it as an IPv6 address rather than dotted-decimal IPv4

Explanation

Correct Answer

A:

Correct for network reachability echo: ping sends ICMP echo requests and reports replies or loss when permitted by the network.

Incorrect Answers

B:

This action targets DNS record lookup: host performs DNS lookups and displays the returned resource records. The stated task instead calls for network reachability echo.

C:

This action targets listening TCP sockets: ss lists TCP sockets and -l restricts the display to listening sockets. The stated task instead calls for network reachability echo.

D:

This action targets IPv6 address recognition: IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation. The stated task instead calls for network reachability echo.

Question 482

An operator follows this instruction: Run ping -c 4 target.example. For the task described as "network reachability echo", what is the most accurate expected result?

  1. host performs DNS lookups and displays the returned resource records.
  2. ping sends ICMP echo requests and reports replies or loss when permitted by the network.
  3. ss lists TCP sockets and -l restricts the display to listening sockets.
  4. IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation.

Explanation

Correct Answer

B:

Correct consequence of Run ping -c 4 target.example. This outcome explains its use for network reachability echo.

Incorrect Answers

A:

This outcome belongs to DNS record lookup and would follow Run host example.org; it is not the principal result of Run ping -c 4 target.example.

C:

This outcome belongs to listening TCP sockets and would follow Run ss -tln; it is not the principal result of Run ping -c 4 target.example.

D:

This outcome belongs to IPv6 address recognition and would follow Identify it as an IPv6 address rather than dotted-decimal IPv4; it is not the principal result of Run ping -c 4 target.example.

Question 483

A technician wants a basic ICMP echo probe to assess IP reachability to a known host. A teammate tries this different approach instead: Run host example.org. The requirement is still unmet. Which corrective action should replace the misapplied approach?

  1. Run host example.org
  2. Run ss -tln
  3. Run ping -c 4 target.example
  4. Identify it as an IPv6 address rather than dotted-decimal IPv4

Explanation

Correct Answer

C:

Replace the attempt with this step: ping sends ICMP echo requests and reports replies or loss when permitted by the network. It fits network reachability echo.

Incorrect Answers

A:

This step is specific to DNS record lookup: host performs DNS lookups and displays the returned resource records. It does not fix the stated requirement for network reachability echo.

B:

This step is specific to listening TCP sockets: ss lists TCP sockets and -l restricts the display to listening sockets. It does not fix the stated requirement for network reachability echo.

D:

This step is specific to IPv6 address recognition: IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation. It does not fix the stated requirement for network reachability echo.

Question 484

A technician wants a basic ICMP echo probe to assess IP reachability to a known host. One student proposes Run ping -c 4 target.example and another proposes Run ss -tln. Which technical comparison is the soundest?

  1. Run ss -tln is more directly suited to network reachability echo than Run ping -c 4 target.example, regardless of the stated constraint.
  2. The two actions are interchangeable for network reachability echo and necessarily have the same main result.
  3. Identify it as an IPv6 address rather than dotted-decimal IPv4 is the only useful action for network reachability echo; Run ping -c 4 target.example has no relevant effect.
  4. Run ping -c 4 target.example is used because ping sends ICMP echo requests and reports replies or loss when permitted by the network. The alternative Run ss -tln addresses listening TCP sockets instead.

Explanation

Correct Answer

D:

Correct distinction: Run ping -c 4 target.example targets network reachability echo; ping sends ICMP echo requests and reports replies or loss when permitted by the network. The compared alternative instead serves listening TCP sockets.

Incorrect Answers

A:

Incorrect mapping: Run ss -tln is used for listening TCP sockets. It does not displace Run ping -c 4 target.example for the described requirement.

B:

The mechanisms are different: ping sends ICMP echo requests and reports replies or loss when permitted by the network. By contrast, ss lists TCP sockets and -l restricts the display to listening sockets. They are not universally interchangeable.

C:

The third option addresses IPv6 address recognition: IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation. The original action remains relevant because ping sends ICMP echo requests and reports replies or loss when permitted by the network.

Question 485

A learner wants to query DNS for the address associated with a domain name. Which action most directly addresses this requirement on a Linux-related system?

  1. Run ss -tln
  2. Run host example.org
  3. Identify it as an IPv6 address rather than dotted-decimal IPv4
  4. Run ip addr show

Explanation

Correct Answer

B:

Correct for DNS record lookup: host performs DNS lookups and displays the returned resource records.

Incorrect Answers

A:

This action targets listening TCP sockets: ss lists TCP sockets and -l restricts the display to listening sockets. The stated task instead calls for DNS record lookup.

C:

This action targets IPv6 address recognition: IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation. The stated task instead calls for DNS record lookup.

D:

This action targets IP interface addresses: ip addr show lists network interface address assignments. The stated task instead calls for DNS record lookup.

Question 486

An operator follows this instruction: Run host example.org. For the task described as "DNS record lookup", what is the most accurate expected result?

  1. ss lists TCP sockets and -l restricts the display to listening sockets.
  2. IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation.
  3. host performs DNS lookups and displays the returned resource records.
  4. ip addr show lists network interface address assignments.

Explanation

Correct Answer

C:

Correct consequence of Run host example.org. This outcome explains its use for DNS record lookup.

Incorrect Answers

A:

This outcome belongs to listening TCP sockets and would follow Run ss -tln; it is not the principal result of Run host example.org.

B:

This outcome belongs to IPv6 address recognition and would follow Identify it as an IPv6 address rather than dotted-decimal IPv4; it is not the principal result of Run host example.org.

D:

This outcome belongs to IP interface addresses and would follow Run ip addr show; it is not the principal result of Run host example.org.

Question 487

A learner wants to query DNS for the address associated with a domain name. A teammate tries this different approach instead: Run ss -tln. The requirement is still unmet. Which corrective action should replace the misapplied approach?

  1. Run ss -tln
  2. Identify it as an IPv6 address rather than dotted-decimal IPv4
  3. Run ip addr show
  4. Run host example.org

Explanation

Correct Answer

D:

Replace the attempt with this step: host performs DNS lookups and displays the returned resource records. It fits DNS record lookup.

Incorrect Answers

A:

This step is specific to listening TCP sockets: ss lists TCP sockets and -l restricts the display to listening sockets. It does not fix the stated requirement for DNS record lookup.

B:

This step is specific to IPv6 address recognition: IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation. It does not fix the stated requirement for DNS record lookup.

C:

This step is specific to IP interface addresses: ip addr show lists network interface address assignments. It does not fix the stated requirement for DNS record lookup.

Question 488

A learner wants to query DNS for the address associated with a domain name. One student proposes Run host example.org and another proposes Identify it as an IPv6 address rather than dotted-decimal IPv4. Which technical comparison is the soundest?

  1. Run host example.org is used because host performs DNS lookups and displays the returned resource records. The alternative Identify it as an IPv6 address rather than dotted-decimal IPv4 addresses IPv6 address recognition instead.
  2. Identify it as an IPv6 address rather than dotted-decimal IPv4 is more directly suited to DNS record lookup than Run host example.org, regardless of the stated constraint.
  3. The two actions are interchangeable for DNS record lookup and necessarily have the same main result.
  4. Run ip addr show is the only useful action for DNS record lookup; Run host example.org has no relevant effect.

Explanation

Correct Answer

A:

Correct distinction: Run host example.org targets DNS record lookup; host performs DNS lookups and displays the returned resource records. The compared alternative instead serves IPv6 address recognition.

Incorrect Answers

B:

Incorrect mapping: Identify it as an IPv6 address rather than dotted-decimal IPv4 is used for IPv6 address recognition. It does not displace Run host example.org for the described requirement.

C:

The mechanisms are different: host performs DNS lookups and displays the returned resource records. By contrast, IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation. They are not universally interchangeable.

D:

The third option addresses IP interface addresses: ip addr show lists network interface address assignments. The original action remains relevant because host performs DNS lookups and displays the returned resource records.

Question 489

A service appears unavailable and an operator wants to see locally listening TCP sockets. Which action most directly addresses this requirement on a Linux-related system?

  1. Identify it as an IPv6 address rather than dotted-decimal IPv4
  2. Run ip addr show
  3. Run ss -tln
  4. Run ip route show

Explanation

Correct Answer

C:

Correct for listening TCP sockets: ss lists TCP sockets and -l restricts the display to listening sockets.

Incorrect Answers

A:

This action targets IPv6 address recognition: IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation. The stated task instead calls for listening TCP sockets.

B:

This action targets IP interface addresses: ip addr show lists network interface address assignments. The stated task instead calls for listening TCP sockets.

D:

This action targets default route selection: The routing table shows next hops and the configured default route. The stated task instead calls for listening TCP sockets.

Question 490

An operator follows this instruction: Run ss -tln. For the task described as "listening TCP sockets", what is the most accurate expected result?

  1. IPv6 commonly uses hexadecimal groups separated by colons and supports compressed notation.
  2. ip addr show lists network interface address assignments.
  3. The routing table shows next hops and the configured default route.
  4. ss lists TCP sockets and -l restricts the display to listening sockets.

Explanation

Correct Answer

D:

Correct consequence of Run ss -tln. This outcome explains its use for listening TCP sockets.

Incorrect Answers

A:

This outcome belongs to IPv6 address recognition and would follow Identify it as an IPv6 address rather than dotted-decimal IPv4; it is not the principal result of Run ss -tln.

B:

This outcome belongs to IP interface addresses and would follow Run ip addr show; it is not the principal result of Run ss -tln.

C:

This outcome belongs to default route selection and would follow Run ip route show; it is not the principal result of Run ss -tln.