What DNS records do you know?
Middle+
200
Frontend
6300
681
What is the OSI model? What are L2, L3, L7?
Middle+
177
What is HTTPS and how does it differ from HTTP? What happens during a TLS handshake and what does the browser check in the certificate?
Middle+
163
What happens when you enter http://[site] in a browser and press Enter? Why does a HTTPS lock sometimes appear, and sometimes an error?
Middle+
146
What is an IP address?
Middle+
146
What are TCP and UDP? What is the fundamental difference? Where is UDP used?
Middle+
146
What is the difference between a static and a dynamic IP address?
Middle+
144
Why are dynamic IP addresses needed if static ones are so convenient?
Middle+
132
Why are static IP addresses needed?
Middle+
126
What does the device's IP address depend on? What are white and gray IP addresses?
Middle+
118