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

Network +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

Network +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

Network +4 Designing TCP/IP-Based Networks Subnetting Enhance security Improve performance Simplify troubleshooting

Network +5 Designing TCP/IP-Based Networks (continued) Subnetting Classful Addressing

Network +6 Designing TCP/IP-Based Networks (continued)

Network +7 Designing TCP/IP-Based Networks (continued) Subnetting Subnet Masks

Network +8 Designing TCP/IP-Based Networks (continued)

Network +9 Designing TCP/IP-Based Networks (continued)

Network +10 Designing TCP/IP-Based Networks (continued)

Network +11 Designing TCP/IP-Based Networks (continued) Subnetting Reserved Addresses

Network +12 Designing TCP/IP-Based Networks (continued) Subnetting Subnetting Techniques

Network +13 Designing TCP/IP-Based Networks (continued)

Network +14 Designing TCP/IP-Based Networks (continued)

Network +15 Designing TCP/IP-Based Networks (continued) Subnetting Calculating Subnets

Network +16 Designing TCP/IP-Based Networks (continued)

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

Network +18 Designing TCP/IP-Based Networks (continued)

Network +19 Designing TCP/IP-Based Networks (continued)

Network +20 Designing TCP/IP-Based Networks (continued)

Network +21 Designing TCP/IP-Based Networks (continued) Subnetting Internet Gateways

Network +22 Designing TCP/IP-Based Networks (continued)

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

Network +24 Designing TCP/IP-Based Networks (continued)

Network +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

Network +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

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

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

Network +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

Network +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

Network +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)

Network +32 Additional TCP/IP Utilities (continued)

Network +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

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

Network +35 Additional TCP/IP Utilities (continued)

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

Network +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

Network +38 Additional TCP/IP Utilities (continued)

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

Network +40 Additional TCP/IP Utilities (continued)

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

Network +42 Additional TCP/IP Utilities (continued)

Network +43 Additional TCP/IP Utilities (continued) Ifconfig -a down up

Network +44 Additional TCP/IP Utilities (continued)

Network +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

Network +46 Voice Over IP (VOIP) (continued)

Network +47 Voice Over IP (VOIP) (continued)

Network +48 Voice Over IP (VOIP) (continued)

Network +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

Network +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