This document provides an overview of computer hardware, networking concepts, and signs of hardware failure. It discusses that hardware underlies the programs we run and is governed by a clock speed. When suspecting hardware failure, check for unusual heat, inconsistent program behavior with same inputs, and issues with power or grounding. It also defines common networking terms like MAC addresses, which identify devices on a network, IP addresses for global and private networks, and DNS for mapping URLs to IP addresses. The document concludes by noting no single entity owns the internet and lists some incorrect guesses of potential owners.

1. Computer Hardware
& Networking
Ikuru K

2. Outline
• Hardware
– What is hardware
– Clock
– When to suspect failure
• Networks
– Mac address
– IP address
– DNS

3. Where is Hardware?
• Hardware is the
underlying thing
that the progra
mmer eventuall
y controls.

4. What is inside a c omputer?

5. What do we need to know about computer ha
rdware?
• All computer hardware is governed by a clock
-> higher frequency, higher performance, higher
power consumption.

6. What do we need to know about computer h
ardware?
• All computer hardware are driven by electricit
y
-> always check power and ground before suspe
cting hardware failure.

7. What do we need to know about computer ha
rdware?
• Hardware failure
->Application failu
re
• Some code can d
estroy hardwar
e.
(usually prevented
by hardware desig
n)

8. When to suspect hardware
failure?
• Unusually Hot
• Program behaves differently with same initial
conditions, same inputs

9. Future reference
• Want to design/prototype hardware?
• Check out FPGA or logic simulators

10. Network

11. Network ~ Graph

12. Mac address
• Used to identify a node on the network
• Cmd->getmac

13. IP address
• Global IP address
http://www.whatismyip.com/
• Private IP address
ipconfig

14. DNS
• Map a url to an IP address
• Cmd-> nslookup google.com

15. Who owns the internet?
• Guesses?
• Google?
• ICANN?
• Yahoo?
• TCS?

16. • Thank you