DNS and DHCP

 Quality Thought is recognized as the best software testing institute in Hyderabad, offering top-notch training in manual testing, automation testing, and full stack testing tools. With a focus on industry-relevant curriculum and hands-on practice, Quality Thought prepares students for real-world software testing challenges. The institute provides expert-led training on popular tools and frameworks like Selenium, TestNG, Jenkins, Git, Postman, JIRA, Maven, and Cucumber, covering both frontend and backend testing essentials.


Quality Thought’s Full Stack Testing course is specially designed to make students proficient in both manual testing fundamentals and automated testing tools, along with exposure to API testing, performance testing, and DevOps integration. The institute stands out for its experienced trainers, live projects, placement support, and flexible learning options including classroom and online modes.


Whether you are a fresher aiming for a job or a working professional looking to upskill, Quality Thought offers customized learning paths. Its strong industry connections ensure regular placement drives and job interview 

DNS and DHCP

✅ DNS (Domain Name System):

DNS is like the phonebook of the internet. It translates domain names (like www.google.com) into IP addresses (like 142.250.195.36) so that computers can communicate.


When you type a website URL, your system sends a request to a DNS server.


The DNS server returns the corresponding IP address.


This allows your browser to load the correct website.


Types of DNS Records:


A – Address record (maps domain to IPv4)


AAAA – Maps domain to IPv6


CNAME – Alias for another domain


MX – Mail Exchange (email routing)


DNS Servers:


Local DNS Resolver (ISP provided)


Root Servers


TLD Servers (.com, .org)


Authoritative DNS Servers (actual domain info)


✅ DHCP (Dynamic Host Configuration Protocol):

DHCP automatically assigns IP addresses and network configuration to devices on a network.


Without DHCP, IPs must be assigned manually.


With DHCP, when a device connects, it sends a DHCP Discover.


The DHCP server replies with an available IP, subnet mask, gateway, and DNS.


DHCP Process:


Discover


Offer


Request


Acknowledge (DORA)


Benefits:


Reduces manual errors


Efficient IP management


Helps with dynamic networks


🔄 DNS vs DHCP:

Feature DNS DHCP

Purpose Converts domain to IP Assigns IP to devices

Works at Application Layer Network Layer

Role Name resolution IP configuration


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