Chapter 11: Networking with TCP/IP and the Internet

1. Chapter 11: Networking with TCP/IP and the Internet Network+ Guide to Networks Third Edition

2. Objectives • Discuss methods of network design unique to TCP/IP networks, including subnetting, CIDR, and NAT • Describe protocols used between mail clients and mail servers

3. Objectives (continued) • Explain the fundamental principles of using a TCP/IP network for packetized voice transmissions • Employ multiple TCP/IP utilities for network discovery and troubleshooting

4. Designing TCP/IP-Based Networks • Subnetting • Enhance security • Improve performance • Simplify troubleshooting

5. Designing TCP/IP-Based Networks (continued) • Subnetting • Classful Addressing

6. Designing TCP/IP-Based Networks (continued)

7. Designing TCP/IP-Based Networks (continued) • Subnetting • Subnet Masks

8. Designing TCP/IP-Based Networks (continued)

9. Designing TCP/IP-Based Networks (continued)

10. Designing TCP/IP-Based Networks (continued)

11. Designing TCP/IP-Based Networks (continued) • Subnetting • Reserved Addresses

12. Designing TCP/IP-Based Networks (continued) • Subnetting • Subnetting Techniques

13. Designing TCP/IP-Based Networks (continued)

14. Designing TCP/IP-Based Networks (continued)

15. Designing TCP/IP-Based Networks (continued) • Subnetting • Calculating Subnets

16. Designing TCP/IP-Based Networks (continued)

17. Designing TCP/IP-Based Networks (continued) • Subnetting • Classless Inter-Domain Routing (CIDR) • Classless routing or supernetting

18. Designing TCP/IP-Based Networks (continued)

19. Designing TCP/IP-Based Networks (continued)

20. Designing TCP/IP-Based Networks (continued)

21. Designing TCP/IP-Based Networks (continued) • Subnetting • Internet Gateways

22. Designing TCP/IP-Based Networks (continued)

23. Designing TCP/IP-Based Networks (continued) • Subnetting • Network Address Translation (NAT)

24. Designing TCP/IP-Based Networks (continued)

25. Designing TCP/IP-Based Networks (continued) • Subnetting • Intranets and Extranets • Hypertext Markup Language (HTML) • Intranet • Within an enterprise • Extranet • Uses Internet-like services and protocols

26. Designing TCP/IP-Based Networks (continued) • Simple Mail Transfer Protocol (SMTP) • Protocol responsible for moving messages from one mail server to another over TCP/IP-based networks

27. TCP/IP Mail Services • MIME (Multipurpose Internet Mail Extensions) • Allows for messages that contain no more than 1000 ASCII characters

28. TCP/IP Mail Services (continued) • Post Office Protocol (POP) • Application layer protocol used to retrieve messages from a mail server

29. TCP/IP Mail Services (continued) • Internet Mail Access Protocol (IMAP) • Retrieve all or only a portion of any mail message • Review their messages and delete them while the messages remain on the server • Create sophisticated methods of organizing messages on the server • Share a mailbox in a central location

30. Additional TCP/IP Utilities • Netstat • -a—Provides a list of all available TCP and UDP connections • -e—Displays details about all the packets • -n—Lists currently connected hosts according to their port and IP address

31. Additional TCP/IP Utilities (continued) • Netstat (cont.) • -p—Allows you to specify what type of protocol statistics to list • Must be followed by a protocol specification (TCP or UDP) • -r—Provides a list of routing table information • -s—Provides statistics about each packet transmitted by a host, separated according to protocol type (IP,TCP, UDP, or ICMP)

32. Additional TCP/IP Utilities (continued)

33. Additional TCP/IP Utilities (continued) • Nbtstat • -a—Displays a machine’s name table given its NetBIOS name • -A—Displays a machine’s name table given its IP address • -r—Lists statistics about names that have been resolved • -s—Displays a list of all the current NetBIOS sessions

34. Additional TCP/IP Utilities (continued) • Nslookup • Allows you to query the DNS database

35. Additional TCP/IP Utilities (continued)

36. Additional TCP/IP Utilities (continued) • Whois • Allows you to query this DNS registration database and obtain information about a domain

37. Additional TCP/IP Utilities (continued) • Traceroute (Tracert) • -d—Instructs the traceroute command not to resolve IP addresses to host names • -h—Specifies the maximum number of hops • -w—Identifies a timeout

38. Additional TCP/IP Utilities (continued)

39. Additional TCP/IP Utilities (continued) • Ipconfig • /?—Displays a list of switches • /all—Displays complete TCP/IP configuration • /release—Releases DHCP • /renew—Renews DHCP

40. Additional TCP/IP Utilities (continued)

41. Additional TCP/IP Utilities (continued) • Winipcfg • Windows 9x and Me operating systems

42. Additional TCP/IP Utilities (continued)

43. Additional TCP/IP Utilities (continued) • Ifconfig • -a • down • up

44. Additional TCP/IP Utilities (continued)

45. Voice Over IP (VOIP) • Voice over IP (VoIP), also known as IP telephony • Lower costs for voice calls • toll bypass • Supply new or enhanced features and applications • Centralize voice and data network management

46. Voice Over IP (VOIP) (continued)

47. Voice Over IP (VOIP) (continued)

48. Voice Over IP (VOIP) (continued)

49. Chapter Summary • Discuss methods of network design unique to TCP/IP networks, including subnetting, CIDR, and NAT • Describe protocols used between mail clients and mail servers

50. Chapter Summary (continued) • Explain the fundamental principles of using a TCP/IP network for packetized voice transmissions • Employ multiple TCP/IP utilities for network discovery and troubleshooting