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Understanding ISP Services and Protocols: DNS, TCP/IP, and Common Networking Solutions

This chapter covers essential network services offered by Internet Service Providers (ISPs) to small and medium-sized businesses. It explains the key protocols that support these services, detailing the design and function of the Domain Name Service (DNS) and its hierarchical structure. Additionally, it reviews the TCP/IP suite, including the differences between TCP and UDP, and how ISPs support common protocols like HTTP, HTTPS, FTP, and email services. The goal is to provide a comprehensive overview of ISPs' roles in delivering efficient network services.

shelby-hensley
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Understanding ISP Services and Protocols: DNS, TCP/IP, and Common Networking Solutions

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  1. ISP Services Working at a Small-to-Medium Business or ISP – Chapter 7

  2. Objectives • Describe the network services provided by an ISP • Describe the protocols that support the network services provided by an ISP • Describe the purpose, function, and hierarchical nature of Domain Name Service (DNS) • Describe and enable common services and their protocols.

  3. Network Services Provided by an ISP • Identify the network services an ISP will provide to SOHOs and medium-sized organizations

  4. Protocols that Support ISP Services • Review the TCP/IP suite of protocols

  5. Protocols that Support ISP Services • Explain why a protocol would use TCP

  6. The TCP Connection Process • The three-way handshake • Retransmission • Sequencing • Flow Control

  7. Protocols that Support ISP Services • Describe the differences between TCP and UDP ports

  8. Supporting Multiple Services • Describe the purpose and function of TCP and UDP ports

  9. Domain Name Service (DNS) • Describe the purpose of networking naming system srv2

  10. Domain Name Service (DNS) • Describe the purpose and function of DNS.

  11. Domain Name Service (DNS) • Describe the hierarchical design of DNS

  12. Domain Name Service (DNS) • Describe the role of ISPs in the provisioning of DNS service

  13. Services and Protocols • Identify the most common services used on the Internet

  14. Services and Protocols • Describe how an ISP supports the HTTP and HTTPS protocols

  15. Services and Protocols • Describe how an ISP supports the FTP protocol

  16. Services and Protocols • Describe how the ISP supports the SMTP, POP3 and IMAP protocols

  17. Summary • TCP and UDP use port numbers to provide multiple services to hosts. • DNS uses a hierarchical system of databases to resolve names and IP addresses of known hosts within networks and across the Internet. • The most common services used on the Internet include FTP, FTPS, HTTP, HTTPS and SMTP. • ISPs use high-performance servers to support these services.

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