Free Practice Quiz Question List

5 Network Services and Name Resolution Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Network Services and Name Resolution, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: During initial DHCP address discovery, a client uses broadcast messages.

A
True
B
False

Written response

1 point

What UDP port number do DNS queries commonly use?

True or false

1 point

True or false: If DHCP becomes unavailable, a client that still has a valid lease may continue communicating for a time.

A
True
B
False

Written response

1 point

In the common IPv4 DHCP exchange, what are the four stages in order?

True or false

1 point

True or false: A server process can be running while a firewall or routing problem still prevents clients from using its service.

A
True
B
False

Choose one

1 point

A DNS query returns “name does not exist.” What is the most appropriate next step?

A
Assume DNS packets are being blocked and troubleshoot only the firewall.
B
Verify the spelling, domain, and DNS record for the queried name.
C
Replace the client's IP address because the response proves DHCP failed.
D
Treat the response as proof that the DNS server is not running.

Choose one

1 point

A computer can reach a destination by IP address but not by its hostname. Which area should you investigate first?

A
Investigate DHCP first, because this pattern proves the client has no IP address.
B
Assume the destination application is stopped, because hostname access failed.
C
Investigate DNS configuration or records, because IP access works but hostname access does not.
D
Replace the network adapter, because this pattern proves the physical link is down.

Choose one

1 point

A client times out while querying its configured DNS server. What is the best interpretation and initial check?

A
Conclude that the queried name definitely has no DNS record.
B
Check whether the intended DNS server is reachable and responding, and investigate the service or network path.
C
Assume the application at the destination is stopped, without checking DNS.
D
Change the DNS record immediately; a timeout proves the record is incorrect.

Choose one

1 point

Several clients on one subnet fail to obtain network access, while clients on other subnets work. Which approach is most appropriate?

A
Investigate each affected device's local adapter first; a shared subnet issue is unlikely.
B
Check shared subnet components such as the relay, VLAN, and gateway.
C
Replace the central DNS server because any subnet-specific failure proves DNS is at fault.
D
Wait for existing DHCP leases to expire; that is the only likely cause.

Choose all

1 point

Clients on the DHCP server's own subnet obtain leases, but clients on a different subnet do not. Which checks are relevant? Select all that apply.

A
Verify the relay or IP-helper configuration and the return path.
B
Flush the DNS client cache on every affected device.
C
Check whether VLAN boundaries, firewalls, or DHCP-snooping controls are blocking DHCP traffic.
D
Confirm that the remote clients are on the intended VLAN and that their DHCP requests can reach the relay.

Choose all

1 point

After a DNS record is corrected, some clients continue using an old address. Which considerations or actions are relevant? Select all that apply.

A
Account for cached DNS results and the record's time-to-live.
B
On Windows, use ipconfig /flushdns to clear the client DNS cache.
C
Assume the server's DNS service is stopped, because an old result rules out caching.
D
Check whether a local hosts-file entry is supplying an address without a DNS query.

Open ended

1 point

One workstation cannot resolve a name that another workstation can resolve. A packet capture on the affected workstation shows that no DNS query leaves it. What is the most likely fault scope, and what should you check next?

Choose one

1 point

A computer can reach a website using its IP address, but the website’s hostname does not work. Which area should you investigate first?

A
Investigate the computer’s default gateway first, because a working IP connection proves the gateway is misconfigured.
B
Investigate DNS configuration or records, because IP access works but hostname access does not.
C
Investigate DHCP lease renewal, because hostname access always requires a new lease.
D
Investigate the destination’s application port, because IP access proves the hostname is correct.

Choose one

1 point

A DNS query returns a “name does not exist” response. What does this result indicate, and what should you verify?

A
The DNS server is unreachable, because all unsuccessful lookups produce the same result.
B
The client has no valid IP configuration, because DNS servers cannot answer clients with an address.
C
The queried server has no matching DNS data for that name; verify the spelling, domain, and record.
D
The destination’s application service is stopped, because DNS checks whether applications are running.

Choose one

1 point

A client has no usable IP address and cannot reach its default gateway. What is the best first troubleshooting step?

A
Check the client’s link, adapter, VLAN, and DHCP configuration before testing DNS.
B
Change the DNS server, because DNS assigns the client’s IP address.
C
Flush the DNS cache, because cached records prevent the client from reaching its gateway.
D
Check only the DHCP server’s logs, because a missing client address proves that server is down.

Choose one

1 point

A server responds to ping, but users cannot connect to an application hosted on it. What is the most accurate conclusion?

A
The application service is working, because ping confirms all traffic can reach the host.
B
The application service is stopped, because ping can succeed only when it is stopped.
C
The DNS server is misconfigured, because ping uses a different protocol from DNS.
D
The host responds to ICMP, but the application service may still be unavailable; test that service directly.

Written response

1 point

What is a DHCP relay agent often called?

Written response

1 point

What UDP port does a DHCP server normally use? Enter the port number.

Fill in the blank

1 point

A DHCP-configured client receives a valid IP address and gateway but is assigned the wrong resolver address. Correct the DHCP scope's setting.

Fill in the blank

1 point

A DNS server correctly answers queries for its own internal zone but cannot resolve external names. Check whether the server's are configured to send queries to other DNS servers.

5 Network Services and Name Resolution Online Quiz Questions

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