19_091009_Chpt06 - MIS 301 Introduction to IT Management...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MIS 301 Introduction to IT Management Lizhen Xu IROM Department McCombs School of Business Chapter 6 Data Communications Recap You Roommate Printer Access Point Switch Modem ISP UTP Cable U T P C a b l e UTP Cable 802.3 8 2 . 3 802.3 802.11 NIC MAC address DSL (ADSL) Dial-up Cable Narrowband Broadband LAN Ethernet / Recap 1. Device Access Router - contains • Ethernet LAN switch • 802.11g wireless access point • Router 2. UTP cable 3. Printer NIC 4. Printer 5. DSL modem 1 2 3 4 5 Recap PSDN Networks of Leased Lines Two Threats • Snooping – Encryption! • Malicious access to organizational network resources – Firewalls! How Does Encryption Work? • Encryption – Transforming clear text into coded text – Used for secure storage or communication – Uses algorithms: DES, 3DES, AES • Key: Used to encrypt data – Algorithm applies key to produce coded message • Symmetric encryption • Asymmetric encryption Encryption Encryption Encryption and Decryption Clear Text Clear Text Cipher Text M e e t m e a t M i d n i g h t 8 v y a l e h 3 1 & d k t u . d t r w 8 7 4 3 $ F i e * n P 9 3 h M e e t m e a t M i d n i g h t Decryption Decryption Symmetric & Asymmetric encryption Symmetric & Asymmetric encryption...
View Full Document

{[ snackBarMessage ]}

Page1 / 28

19_091009_Chpt06 - MIS 301 Introduction to IT Management...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online