chapter 9 is all about software and how it works,
it is also about ip adresses and passwords.
The Importance of Security:
  • Private information, company secrets, finacial data, computer equipment and items of national security are placed at risk if proper security procedures are not followed.
  • A technician’s primary responsibilities include data and network security. 
internal threats – cause a melicious threat or a accidental threat
external threats – ouside users can atatck.
a worm is a self repulactating virus that duplicates itself when it  gets on a network.
a trojan horse is known for its way to get inot the network. it pretends that it is something good and it is reaaly something bad.
security:
computer and network security help to keep data and equipment functioning and provide acsess onley to the right people and who i want to see it, anyone in a large buisness using computers should look into security because its very helpfull.
To successfully protect computers and the networks a techniction must understand all types of threats to computer security.

 
 
TCP/IP is the protocol suite that is used to control all of the communications on the Internet. Unfortunately, TCP/IP can also make a network vulnerable to attackers.
Some of the most common attacks:
  • SYN Flood – Randomly opens TCP ports, tying up the network equipment or computer with a large amount of false requests, causing sessions to be denied to others
  • DoS – Sends abnormally large amounts of requests to a system preventing access to the services
  • DDoS – Uses "zombies" to make tracing the origin of the DoS attack difficult to locate
  • Spoofing – Gains access to resources on devices by pretending to be a trusted computer
  • Man-in-the-Middle – Intercepts or inserts false information in traffic between two hosts
  • Replay – Uses network sniffers to extract usernames and passwords to be used at a later date to gain access
  • DNS Poisoning – Changes the DNS records on a system to point to false servers where the data is recorded.
this is what i have leart over chapter 9.