DHCP for automatic IP assignment in Computer Networks - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

How DHCP assigns IP addresses

What is the main process by which a DHCP server assigns an IP address to a device on a network?

A The device manually sets its IP and informs the DHCP server.

B The device requests an IP and the DHCP server offers one from its pool, then the device accepts it.

C The DHCP server assigns the same IP address to every device that connects.

D The device randomly picks an IP and the DHCP server confirms if it is free.

💡 Hint

Think about how the device and server communicate to avoid IP conflicts.

DHCP works by the device asking for an IP, the server offering one from its available pool, and the device accepting it. This avoids conflicts and automates IP assignment.

📋 Factual

intermediate

DHCP lease time purpose

What is the purpose of the DHCP lease time?

A It is the time a device waits before requesting an IP again after disconnecting.

B It sets the time the DHCP server waits before assigning an IP.

C It defines how long a device can keep an assigned IP before it must renew or release it.

D It controls how long the DHCP server stores device information permanently.

💡 Hint

Consider why IP addresses might need to be reused over time.

The lease time limits how long a device can use an IP address. After it expires, the device must renew the lease or the IP can be reassigned to another device.

🔍 Analysis

advanced

Troubleshooting DHCP IP conflicts

A network has two devices with the same IP address causing connection issues. Which DHCP-related cause is most likely?

A The DHCP server's IP pool overlaps with manually assigned static IPs.

B The DHCP server assigned the same IP twice by mistake.

C The devices are using different DHCP servers on the same network.

D The DHCP lease time is set too long.

💡 Hint

Think about how static IPs and DHCP pools can conflict.

If static IPs are set within the DHCP server's pool range, the server might assign those IPs to other devices, causing conflicts.

❓ Comparison

advanced

Dynamic vs Static IP assignment

Which statement correctly compares dynamic IP assignment via DHCP and static IP assignment?

A Dynamic IPs are always faster than static IPs in network communication.

B Dynamic IPs require manual configuration; static IPs are assigned automatically.

C Static IPs are assigned by DHCP servers; dynamic IPs are chosen by devices themselves.

D Dynamic IPs change over time and are assigned automatically; static IPs are fixed and set manually.

💡 Hint

Consider how IP addresses are managed and assigned in each method.

Dynamic IPs are given automatically by DHCP and can change, while static IPs are manually set and remain constant.

❓ Reasoning

expert

Effect of DHCP server failure on a network

What is the most likely effect on devices trying to join a network if the DHCP server fails completely?

A New devices cannot get IP addresses automatically and may fail to connect to the network.

B All devices keep their IPs and continue working without any issues.

C Devices will automatically switch to static IPs assigned by the router.

D The network will assign IPs randomly to devices without the DHCP server.

💡 Hint

Think about what role the DHCP server plays when devices first connect.

Without a DHCP server, devices cannot receive IP addresses automatically, so new devices cannot join the network properly.