Interview Q&A / Computer Networks
Computer Networks interview questions
What happens when you open a website, TCP vs UDP, DNS and HTTP.
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- What is a port number, and how is it different from an IP address?
An IP address identifies a machine on a network. A port number (0 to 65535) identifies which program on that machine should receive the data. Together they pick out one exact conversation endpoint.
BeginnerQuick answer1 min read - What is a socket, and how can one server handle thousands of clients on port 443?
A socket is one endpoint of a connection: an IP address plus a port plus a protocol. A TCP connection is identified by the four-tuple of source IP, source port, destination IP and destination port, so many clients can share the server's port 443 because each tuple is unique.
IntermediateQuick answer1 min read