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DHCP interview questions

DHCP interview questions

Introduction to DHCP interview questions

DHCP (Dynamic Host Configuration Protocol) is a network protocol that allows a server to assign an IP address to a machine based on a predetermined range of numbers (i.e., a scope) established for a particular network. If you are looking for a job related to the microprocessor, you need to prepare for the 2023 DHCP Interview Questions. Every interview is indeed different as per the different job profiles. Here, we have prepared the important DHCP Interview Questions and Answers, which will help you succeed in your interview.

Below are the 15 important 2023 DHCP interview questions and answers that are frequently asked in an interview. These questions are divided into two parts are as follows:

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Part 1 – DHCP Interview Questions and Answers (Basic)

This first part covers basic Interview Questions and Answers.

Q1. What Is the Dhcp Client Machine Process?

Answer:

A DHCP client is used to turn on a computer. The client computer sends out a broadcast request (DISCOVER/DHCPDISCOVER) in order to receive a response from a DHCP server. The DISCOVER packet is routed across the router to the relevant DHCP server.

The server receives the DISCOVER packet. Next, the server determines an appropriate address to give to the client based on the server’s availability and use regulations. The server then reserves that address for the client and sends an OFFER/DHCPOFFER packet containing that address information back to the client.

The server sends an ACK/DHCPACK packet to certify that the client has been awarded a lease on the address for the amount of time specified by the server.

Q2. What Is Dhcp Scope?

Answer:

DHCP scopes specify address ranges from which a DHCP server can allocate IP addresses to clients.

Q3. What are the Different Types Of Scopes In Windows DHCP?

Answer:

Normal Scope — Allows A, B, and C Class IP address ranges, as well as subnet masks, exclusions, and reservations, to be specified. Each normal scope must be defined in its own subnet.

Multicast Scope — For Class D networks, this is used to assign IP address ranges. Subnet masks, reservations, and other TCP/IP parameters are not available in multicast scopes.

Superscope – A superscope is essentially a collection of scopes that are bundled together and can be enabled and disabled as a single object.

Q4. How DHCP Works?

Answer:

It is based on the DORA system.

DHCP Discover is denoted by the letter D.

The letter O denotes DHCP Offer.

R stands for DHCP Request.

DHCP Acknowledgement is denoted by the letter A. The DHCP server sends a DHCPPACK to the client as a confirmation.

Q5. Which port does DHCP use?

Answer:

DHCP uses 67 and 68 ports. Therefore, requests are handled on UDP port 68, and the server responds on UDP port 67.

Part 2 – DHCP Interview Questions and Answers (Advanced)

Let us now have a look at the advanced Interview Questions and Answers.

Q6. In Active Directory Open DHCP, how do you authorize a DHCP server?

Answer:

Click DHCP in the console tree.

Select Manage authorized servers from the Action menu.

The dialog box Manage Authorized Servers displays. Click the Authorize button.

Simply type the IP address or name of the DHCP server that needs to be authorized when requested, then click OK.

Q7. What Is DHCPInform?

Answer:

DHCP clients use the DHCPInform message to get DHCP parameters. For example, Windows 2000 and Windows 98 remote access clients use the DHCPInform message to receive DNS server IP addresses, WINS server IP addresses, and a DNS domain name, but PPP remote access clients do not use DHCP to retrieve IP addresses for the remote access connection. After the IPCP negotiation is complete, the DHCPInform message is sent. The remote access server’s DHCPInform message is subsequently passed to a DHCP server. The remote access server forwards only DHCPInform messages if it is configured using the DHCP Relay Agent.

Q8. What Is A Mac Address?

Answer:

A MAC address (also known as an Ethernet address or an IEEE MAC address) is a number that uniquely identifies a computer with an Ethernet interface (usually represented as twelve hexadecimal digits, 0 through 9 and A through F, or as six hexadecimal numbers separated by periods or colons, — in other words 0080002012ef, 0:80:0:2:20:ef).

It does not provide any information about your computer’s location, unlike the IP number. Instead, the server often utilizes the MAC address of a requesting PC to uniquely identify it via DHCP.

Q9. Can DHCP Support Statically Defined Addresses?

Answer:

Yes, indeed. At the very least, there’s nothing in the protocol that prevents that, and any DHCP server should support it. This is a server-side issue, and the client should work in any case. This is referred to as manual allocation in the RFC.

Q10. What is the default time for assigning a new IP address to a client?

Answer:

8 Days.

Q11. What do you mean by DHCP Spoofing?

Answer:

Ascend Pipeline ISDN routers connecting Ethernets to ISDN lines include a capability known as “DHCP spoofing,” which is simply a little server implementation that hands an IP address to a connecting client Windows 95 PC in order to give it an IP number during the connection process.

Q12. Is It Possible For A Bootp Client To Boot From A Dhcp Server?

Answer:

Only when the DHCP server is configured to receive BOOTP requests.

Q13. What is the command for releasing an IP address?

Answer:

ipconfig /release

Q14. What is the command for renewing an IP address?

Answer:

ipconfig /renew

Q15. What do you mean by APIPA IP address?

Answer:

When a DHCP server fails or is unavailable to issue an IP address to a client, the computer will automatically assign an IP address to the client, which is an APIPA IP address.

Conclusion

That concludes our list of the most popular DHCP interview questions and answers. Reading this list will undoubtedly help you in tightening up your DHCP interview preparation. I hope you will find this article helpful.

Recommended Articles

This has been a guide to the list of DHCP Interview Questions and Answers so that the candidate can crackdown on these Interview Questions easily. Here in this post, we have studied top DHCP Interview Questions and Answers for Interviews, which are often asked in interviews. You may also look at the following articles to learn more –

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