Internet Basics
What does HTTP stand for?
HyperText Transfer Protocol
What is a packet?
A chunk of data sent across the internet
What does DNS stand for?
Domain Name System
Which protocol ensures reliable packet delivery?
TCP
What identifies a device on the internet?
What does IP stand for ?
Internet Protocol
What device directs packets?
Routers
Why do we use DNS?
It translates domain names into IP addresses
Why is fault tolerance important?
the internet keeps working even if parts fail
Why does every device need an IP address?
So the router knows where to send/receive data
What is the difference between IPv4 and IPv6?
IPv6 provides more addresses
Why is redundancy important in routing?
It ensures reliability if one path fails
Why is a hierarchical structure used in DNS?
It organizes domain names efficiently and allows faster lookups
What's the difference between TCP and UDP?
TCP is reliable UDP is faster
Why was IPv6 created?
To provide more IP addresses
Why does the Internet use layered protocols?
Each layer handles different task for efficiency
True or False: Routers always use the same path.
False
What happens if a DNS server cannot find an IP address?
It asks another DNS server higher in the hierarchy until the address is found
How does redundancy improve reliability?
Multiple paths ensure delivery if one fails
How does a URL get translated into an IP address?
Through DNS lookup
Explain how packets travel across the Internet.
How do routers decide where to send packets?
They use routing tables and the best path selections
What is DNS spoofing?
A fake DNS response that redirects traffic
What is DDoS?
Distributed Denial of Service Attack
What happens if two devices share the same IP?
A conflict occurs, and communication may fail.