How should I use these Network Services practice questions?

Read each scenario carefully and choose your answer before revealing the explanation. Then check why your choice was right or wrong. Repeat until the reasoning feels automatic.

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Yes — use the session launcher on this page to start a 10-, 20-, 30- or 50-question session drawn entirely from the Network Services domain.

220-1201 · topic practice

Network Services practice questions

Practise identifying, configuring, and troubleshooting core network services like DNS, DHCP, NAT, and NTP for the 220-1201 exam.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security

20 questionsDomain: Network Services

Practice 10 questions Browse domain →

What the exam tests

What to know about Network Services

Tests your knowledge of DNS, DHCP, NAT, and other network services configuration and troubleshooting.

DNS record types and resolution process

DHCP lease, scope, and reservation configuration

NAT and PAT for IP address translation

Network time protocol (NTP) synchronization

Why learners struggle

Why Network Services questions are commonly missed

Network services questions are commonly missed because candidates confuse protocol roles and port numbers. The overlap between DNS, DHCP, and NAT functions creates specific mix-ups.

·DNS vs DHCP — name resolution vs IP assignment
·NAT vs PAT — address vs port translation
·DHCP scope vs reservation — dynamic vs static
·DNS A vs AAAA — IPv4 vs IPv6 records
·NTP vs SNTP — accuracy vs simplicity
·DHCP relay vs DHCP server — forwarding vs providing

Watch out for

Common Network Services exam traps

▸Confusing DNS A record with CNAME for hostname mapping
▸Thinking DHCP assigns static IPs instead of dynamic leases
▸Mixing up NAT and PAT port vs address translation
▸Assuming NTP only syncs time once, not periodically

Practice set

Network Services questions

20 questions · select your answer, then reveal the explanation

Question 1hardmultiple choice

Read the full DNS explanation →

A technician is troubleshooting a network where users can access the internet but cannot reach a specific internal web server by its hostname. The server's IP is 10.0.0.5, and pinging 10.0.0.5 works. The technician checks the DNS server and finds an A record for the server's name pointing to 10.0.0.10. What is the most likely issue?

Trap 1: The DHCP server assigned the wrong IP to the server

The server's IP is 10.0.0.5 and is reachable; DHCP assignment is not the problem since the server is working.

Trap 2: The router's port forwarding is misconfigured

Port forwarding is for external access; internal users don't use it, and the server is reachable by IP.

Trap 3: The server's firewall is blocking DNS queries

DNS queries go to the DNS server, not the web server; the server's firewall wouldn't affect hostname resolution.

Study all Network Services common traps →

A
The DHCP server assigned the wrong IP to the server
Why wrong: The server's IP is 10.0.0.5 and is reachable; DHCP assignment is not the problem since the server is working.
B
The DNS A record is incorrect
The A record points to 10.0.0.10 instead of 10.0.0.5, so DNS resolves to the wrong IP, preventing access by hostname.
C
The router's port forwarding is misconfigured
Why wrong: Port forwarding is for external access; internal users don't use it, and the server is reachable by IP.
D
The server's firewall is blocking DNS queries
Why wrong: DNS queries go to the DNS server, not the web server; the server's firewall wouldn't affect hostname resolution.

Network Services practice questions

What to know about Network Services

Why Network Services questions are commonly missed

Common Network Services exam traps

Network Services questions

A company deploys a load balancer to distribute traffic across three web servers. Users report that they occasionally see outdated content or are asked to log in repeatedly. Which network service configuration is most likely missing to maintain session persistence?

A user configures their laptop to use a static IP address, subnet mask, and default gateway. They can ping other devices on the same subnet but cannot reach the internet. What network service is most likely missing from their configuration?

A company wants to allow employees to securely access the corporate network from home using their laptops. Which network service should be deployed to provide encrypted remote access?

A user reports that they can access internal resources using IP addresses but cannot access them using hostnames. Other users on the same network have no issues. What is the most likely cause?

A user reports that they cannot access any websites, but they can ping the IP address of a public DNS server (8.8.8.8). What is the most likely misconfigured network service?

A small office uses a single public IP address for internet access. The network administrator wants internal web servers to be reachable from the internet on port 80. Which network service should be configured on the router to allow this?

A customer complains that their VoIP phone intermittently drops calls. A technician checks the network and finds high latency and jitter during peak hours. Which network service should be configured to prioritize VoIP traffic?

A network administrator wants to ensure that all devices on a subnet automatically receive IP addresses from a specific range, and that the lease time is set to 8 hours. Which configuration file or service should be modified?

A small office has a single internet connection and needs to allow multiple internal devices to share that connection. The router's public IP is assigned by the ISP. Which network service must be enabled on the router to allow internal devices to communicate with external servers?

A network administrator is setting up a new branch office. The branch router must automatically obtain a public IP address from the ISP, and internal devices must receive private IP addresses from the router. Which combination of network services should be configured on the router?

A user reports that their computer cannot connect to the internet after being moved to a new office. The computer receives an IP address starting with 169.254.x.x. Which network service is failing to provide a valid IP configuration?

A company uses a proxy server for internet access. Users report that they can access internal websites but cannot reach external sites. The proxy server's IP is configured in the browser settings. Which network service is most likely failing?

A user complains that they cannot access any websites, but they can ping external IP addresses like 8.8.8.8 successfully. Other devices on the same network work fine. Which network service is most likely failing on this user's computer?

A technician is troubleshooting a network where users can access the internet but cannot connect to a specific internal application server by its hostname. Pinging the server's IP address works. The DNS server is configured correctly for external names. What is the most likely cause?

A customer reports that their laptop can connect to the internet via a wired connection but cannot access any network shares or printers by hostname. They can ping the IP address of the file server. Which network service is most likely misconfigured?

A company's web server is hosted internally and must be accessible from the internet using the domain name www.company.com. The public IP address of the router is 203.0.113.5. Which two network services must be correctly configured to make this work?

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Frequently asked questions

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Study resources

Exam traps to avoid