7 1 ADVANCED Using Mailing Lists and Exploring Wireless Options New Perspectives on THE INTERNET

7 2 Objectives Learn about different types of mailing lists Join and leave a mailing list Post messages to a mailing list Locate mailing lists

7 3 Objectives Retrieve and read a mailing list’s archived files Explore the history of the wireless Internet Learn about different wireless networks Locate products that provide wireless delivery

7 4 What is a Mailing List? A popular way of sharing information is to join, or subscribe to, a mailing list. A mailing list is a list of names and addresses for a group of people who share a common interest in a subject or topic and exchange information by subscribing to the list. Information is sent to the mailing list through by posting a message to the list.

7 5 What is a Mailing List? Different types of software – LISTSERV, ListProc, and Majordomo. A list server runs the list software. In commercial mailing lists, advertisers send promotional materials for specific products to customers based on their expressed preferences.

7 6 What is a Mailing List?

7 7 A list moderator moderates a mailing list to ensure that the list always receives and sends appropriate and relevant information to its members. When an individual does not moderate the list and postings are sent to list members automatically, the list is an unmoderated list. A closed list is one in which membership is not automatic. A list administrator oversees one or more mailing lists and can either reject or accept a request to become a list member.

7 8 What is a Mailing List? Usenet (User’s News Network) is an information network to which people can post and read messages and opinions. Usenet newsgroups group postings by topic. Use a newsreader program to access a newsgroup. You must retrieve information from a newsgroup, it is not sent automatically. When a message is sent to a newsgroup, anyone with Internet access and a newsreader can read it.

7 9 What is a Mailing List? Potential problems of mailing lists: –Mail volume may be more than you can read. –Repetition of questions that have been previously posted on the mailing list.

7 10 Subscribing to a Mailing List Message digests are several postings grouped in a single message to help reduce the number of messages received. Messages are messages that express ideas or ask questions that each member of the mailing list receives. Commands request the list server to take a prescribed action. Commands are not forwarded to other list members.

7 11 Subscribing to a Mailing List

7 12 Subscribing to a Mailing List

7 13 Subscribing to a Mailing List

7 14 Posting a Message to a Mailing List

7 15 Reading a Mailing List’s Archived Files Many list servers file every message received by the list in an archive. Send an index command to the mailing list’s administrative address to get a list of available archive files. Use the get command to select the files you would like to receive.

7 16 Identifying a Mailing List’s Members

7 17 Leaving a Mailing List You can leave a mailing list, or drop the mailing list, or unsubscribe. Send an unsubscribe message to the list’s administrative address, include the unsubscribe or signoff command followed by the list’s name. Check the mailing list’s confirmation message to determine the proper command to use.

7 18 Searching for Existing Mailing Lists

7 19 Searching for Existing Mailing Lists

7 20 Searching for Existing Mailing Lists

7 21 Wireless Technologies As new technologies emerge, wireless Internet devices and services may increase to well over 125 million users by 2004 or 2005 in North America alone. Second-generation wireless systems, or 2G wireless, support voice and text transmission over the same connection. Short Message Service (SMS) – allows text messages of up to 160 characters over a 2G wireless network.

7 22 Wireless Technologies

7 23 Wireless Technologies Figure 7-12

7 24 Wireless Local Area Networking Wi-Fi or wireless fidelity – specifies the interface between a wireless client and a base station or between two wireless clients. Wireless local area network or WLAN – a network in which devices use high frequency radio waves instead of wires to communicate. Wi-Fi also known as b.

7 25 Wireless Local Area Networking

7 26 Wireless Local Area Networking

7 27 Personal Area Networking Personal area networking – wireless network used to connect personal devices to each other. There are two major types of personal area networks: –Infrared –Bluetooth

7 28 Personal Area Networking

7 29 Personal Area Networking Figure 7-16

7 30 Personal Area Networking

7 31 Wireless Wide Area Networking Wireless wide area networking (WWAN) makes it possible to access and the Internet from anywhere within boundaries of the wireless network to which it is connected. The wireless WAN of the future will use wireless connections and technologies, such as GPRS, to connect networks to each other along a spectrum.

7 32 Wireless Wide Area Networking Figure 7-18

7 33 Wireless Wide Area Networking Figure 7-19

7 34 Wireless The connection between a wireless phone and PDA can give users ability to access the Internet and remotely. New ways of transmitting data and new hardware will make data easier to read and use. One new technology is a mini, collapsible keyboard.

7 35 Wireless Figure 7-20

7 36 Wireless Figure 7-21

7 37 Wireless

7 38 Wireless

7 39 Wireless

7 40 Wireless

7 41 Wireless

7 42 Wireless

7 43 Wireless