© Copyright 1997, The University of New Mexico C-1 Internet Service Provider Services What to do once you’re connected.

© Copyright 1997, The University of New Mexico C-2 Dial-in access Provides LAN and WAN access Requires a computer at the remote end Connects them as though they were on the LAN

© Copyright 1997, The University of New Mexico C-3 Domain Name Service (DNS) Maps Hostnames such as to IP addresses a domain is hosted by one authoritative DNS server sub-domains can be delegated domains are registered with ANS

© Copyright 1997, The University of New Mexico C-4 Internet Routing Provides dial-in users with a gateway to the Internet Carries with it greater risks and liability Requires a high-speed link to the Internet

© Copyright 1997, The University of New Mexico C-5 Stick with Standards –SMTP, MIME, POP, IMAP Requires a server Disconnectable clients are preferable

© Copyright 1997, The University of New Mexico C-6 WWW Service HTML - Hypertext Markup Language Requires a WWW server which runs httpd –Hypertext Transport Protocol Daemon Clients access the server using a browser, which interprets and displays HTML

© Copyright 1997, The University of New Mexico C-7 WWW Service WWW is typically an anonymous service Hypertext documents containing ‘links’ URL - Uniform Resource Locator –

© Copyright 1997, The University of New Mexico C-8 Secured WWW Service Allows authentication (a login) Allows encryption of the data between the client and the server Allows authentication of the server by using a key escrow service

© Copyright 1997, The University of New Mexico C-9 WWW Hosting Allows customers to have a WWW site without managing a server Who creates the content? Who puts it in place? Users are typically charged according to disk space quota

© Copyright 1997, The University of New Mexico C-10 Domain Hosting You can provide domain name service (DNS) for more than one domain on one server The domains you host must be registered with ANS to work properly The domains you host do not have to be ‘like’ yours

© Copyright 1997, The University of New Mexico C-11 FTP Service File Transfer Protocol - ‘get’ and ‘put’ most kinds of data Good for delivering software and other large files Can be used anonymously, but don’t allow anonymous uploads Content based on directory and file structure

© Copyright 1997, The University of New Mexico C-12 Shell Accounts Allows interactive sessions on a host computer Typically using Telnet Often on a Unix server Disk storage and Quotas

© Copyright 1997, The University of New Mexico C-13 Directory Service and Real.Name Addressing Provides a way to find people A database of real names, login IDs, and other information The CSO and X.500 protocols are widely used

© Copyright 1997, The University of New Mexico C-14 Auto Setup Software Installs and configures client software Sets up dial-in connections Detects problems

© Copyright 1997, The University of New Mexico C-15 Support Help Desk WWW pages On-call personnel Automatic Problem detection & resolution

© Copyright 1997, The University of New Mexico C-16 Accounting Important for security Aids in capacity planning Built into most services and operating systems

© Copyright 1997, The University of New Mexico C-17 Billing Connect time Disk storage CPU usage Service Level & Special Services