Spring 2003 MIS 140 Mesher FINAL EXAM NOTES MIS 140 BUSINESS TELECOMMUNICATIONS Be able to answer the following questions CHAPTER 8 WIRELESS LANS TERMS YOU CAN SKIP Complementary Code Keying CCK Orthogonal Frequency Division Multiplexing OFDM short preamble long preamble Physical Layer Convergence Protocol PLCP overlay network 1 WLAN PROTOCOLS What are the four WLAN protocols described in the text List each along with its nominal data rate medium access protocol and transmission frequency 2 SPREAD SPECTRUM What two types of spread spectrum communications are used with wireless LANs What are these How are they different 3 1 2 Mbps 802 11b DSSS Describe the basics of the physical layer transmission technique used by 1 Mbps IEEE802 11b DSSS What is a Barker sequence and why is it used What is DBPSK What is DQPSK and why is it used for 2 Mbps transmissions 4 APs What is an AP and what is its role in WLANs Why are more APs needed for IEE802 11a than for IEEE802 11b 5 DCF What is DCF What medium access control protocol is used by DCF and how does it work 6 PCF What is the hidden node problem How does the Point Coordination Function medium access control technique solve this 7 BLUETOOTH IEEE 802 15 Bluetooth networks are referred to by special names What are these What sorts of devices are typically used on Bluetooth networks What frequency does Bluetooth use What is its MAC protocol CHAPTER 9 NETWORK DESIGN TERMS YOU CAN SKIP Akamai Common Management Interface Protocol CMIP 1 REASONS FOR USING THE BUILDING BLOCK DESIGN APPROACH There are three main reasons given to explain why the building block approach to network design has replaced the traditional network design approach What are these 2 GEOGRAPHIC SCOPE The geographic scope of a network includes three conceptual layers Briefly define each of these 1 Spring 2003 MIS 140 Mesher 3 THREE PHASES TO BUILDING BLOCK NET DESIGN Briefly describe the three phases to the building block approach to network design 4 NETWORK REQUIREMENTS AND LOGICAL NETWORK DIAGRAMS What are the three categories that network requirements can be organized into What is the key deliverable in the need assessment phase What are its main components 5 TECHNOLOGY DESIGN What is the key deliverable in the technology design phase and what are its components 6 SNMP What is SNMP What are the main components that use SNMP and how do they work together draw a simple diagram to illustrate this 7 DEVICE LATENCY What does the term latency mean What is meant by a wire speed device What network conditions make latency a critical issue 8 LOAD BALANCING What is a server farm How are requests managed in one a diagram will be helpful here CHAPTER 10 NETWORK SECURITY TERMS YOU CAN SKIP block cipher computer forensics Delphi team entrapment honey pot Internet Key Exchange IKE IP Security Protocol IPSec OPSec transport mode IPSec tunnel mode Public Key Infrastructure PKI Rijndael algorithm script kiddies 1 TYPES OF SECURITY THREATS There are two basic categories of security threats Define them in detail and give examples 2 RISK ASSESSMENT What is involved in doing a risk assessment What is a control spreadsheet Describe its components in terms of columns rows and cell contents 3 REDUNDANCY Why is redundancy such a critical factor in network security Give four examples of network components that may be redundantly configured 4 COMPUTER VIRUSES What is a computer virus and how do they proliferate How does a macrovirus differ from other computer viruses What remedies exist to combat them How do you think the threat of computer viruses will change in the future 5 USER PROFILES What are user profiles how are they implemented and how are they used to increase network security 2 Spring 2003 MIS 140 Mesher 6 FIREWALLS Define what is meant by a firewall Why are they important in today s networking environment What are the main types of firewalls in use today 7 PRIVATE KEY ENCRYPTION What are the basic elements of private key encryption Why is it sometimes called symmetric encryption What is the brute force method of decryption and how is it affected by key length 8 PUBLIC KEY ENCRYPTION How does public key encryption differ from private key encryption What is the key distribution problem and how does this technique solve it How many keys are needed for two way communication using PKE 9 DIGITAL SIGNATURES Describe the basics of how digital signatures work What is a Certificate Authority 10 SECURE SOCKETS LAYERS What is SSL and where is it used What are the four steps involved in implementing an SSL session What is meant by a Trojan Horse Is it an important security threat to SSL you may have to look this up on the Internet CHAPTER 11 NETWORK MANAGEMENT 1 NETWORK MANAGEMENT CATEGORIES What are the four main areas of network management List and describe each one 2 SEVER LOAD BALANCING What is server load balancing and why is it important How is it used in the world of e Commerce e Business 3 COST OF OWNERSHIP Two costs of ownership concepts exist Total Cost of Ownership and Net Cost of Ownership Define each along with their advantages and disadvantages 4 COST MANAGEMENT What are the main costs in corporate IT budget What are two or three largest categories for personnel costs 5 REDUCING NETWORK COSTS List and describe the five main steps that can be taken to reduce network costs 3