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Practice networking fundamentals including TCP/IP, HTTP, DNS, load balancing, security protocols, and network architecture concepts.
Answer a real Networking interview question before you browse the list. No signup needed.
A network engineer explains that the company's access switches forward frames based on the destination MAC address. At which OSI layer are these switches operating?
Practice in a session
10 questions from Networking, one after another, then your score and streak.
Focus on the OSI model, TCP vs UDP, HTTP/HTTPS, DNS resolution, REST APIs, WebSockets, CDNs, and basic security concepts like TLS/SSL. System design interviews often require understanding of load balancers, reverse proxies, and network latency.
Networking focuses on protocols, data transmission, and how computers communicate. System design uses networking concepts as building blocks but focuses on designing complete systems. Understanding networking fundamentals makes you stronger at system design.
TCP is connection-oriented, guarantees ordered delivery, and handles retransmission - ideal for web traffic, file transfers, and email. UDP is connectionless, faster, and lower overhead but unreliable - used for video streaming, gaming, and DNS queries.
DNS resolves the domain to an IP, a TCP connection is established (with TLS handshake for HTTPS), an HTTP request is sent, the server processes it and returns a response, and the browser renders the HTML/CSS/JS. This is one of the most popular interview questions.
A Content Delivery Network caches content at edge locations worldwide, reducing latency by serving users from the nearest server. CDNs handle static assets (images, CSS, JS) and can also cache API responses. They also provide DDoS protection and SSL termination.
HTTPS adds TLS/SSL encryption on top of HTTP. It uses a handshake to establish a secure connection with certificates, symmetric and asymmetric encryption, and ensures data integrity. HTTPS is now standard for all web traffic and is a ranking factor for search engines.