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Understanding Email Delivery: DNS, IP Addresses, and Server Communication

This document explores the crucial role of DNS in email delivery, explaining how it retrieves the IP address of the destination email server and relays it back to the SMTP server. It details the process of sending and receiving email messages, highlighting potential pathways through DSLAMs and routers. Additionally, the text outlines how streaming data is transmitted to wireless devices, with references to various Cisco publications and resources, emphasizing the importance of efficient routing and firewall functioning in network communications.

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Understanding Email Delivery: DNS, IP Addresses, and Server Communication

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  1. Mapping: Data Transport Jered McClure Walden University

  2. ISP/DNSThe DNS gets the IP address of the destination email server and sends it back to the SMTP Server. Email Message Sending and/or Receiving • Note: There may be additional DSLAMs, and routers, before reaching destination.

  3. Streaming Data to a Wireless Device

  4. References Cisco. (2011). Cisco Carrier Routing System. Retrieved October 7, 2011, from Cisco Systems: http://www.cisco.com/en/US/products/ps5763/index.html Doherty, J., Anderson, N., Maggiora, P. D., & Clement, N. (2008). Cisco Networking Simplified (2nd ed.). Indianapolis: Cisco Press. Telstra. (2011). BigPond Elite 200GB. Retrieved October 7, 2011, from Telstra Bigpond: http://go.bigpond.com/broadband/69-plan/ Tyson, J. (2000, October 24). How Firewalls Work. Retrieved October 07, 2011, from How Stuff Works: http://www.howstuffworks.com/firewall.htm

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