Diploma of Information Technology Subject - CONFIGURE, VERIFY AND TROUBLESHOOT WAN LINKS AND IP SERVICES Provide a brief description on the following: 1. Storage Area Network (SAN) 2. Internet Area Network (IAN) 3. SONET/SDH 4. Wireless Wide Area Network 5. Low Power Wide Area Network 6. Wide area file services 7. Wide area application services 1. Why is there a need for Network Translation Address(NAT)? 2. Describe the following types of cables and provide two examples for each a. Straight-through cable b. Crossover cable c. Roll-over cable 3. Describe the seven layers of OSI model. 4. What is MAC address? 5. What is the largest WAN in the world? Answer the following questions 1. Draw the normal telephone diagram and explain how does it work. 2. Draw the DSL diagram and explain how does it work. 3. What is cable Internet and how does it work? 4. What is point-to-point protocol (PPP)? 5. Define frame relay. 6. Describe VPN. What is it? How does it work? 7. How does DHCP work? 8. Describe Network Address Translation. What is it? How does it work? 9. What is IPV4? IPV6? 10. What is ACL and what is its purpose?