IT Operations - The Internet Flashcards
The Internet
A “network of networks” - global network of millions (billions) of interconnected computers and computer networks
World’s largest client-server network
End-user access to Internet provided by ISPs
A markup or tagging a gauge specifies how data will be processed or displayed
Key Internet Protocols
1) Transmission control protocol/ internet protocol TCP/IP - Two core network protocols that underlie internet
A) Hypertext Transfer Protocol (HTTP) - foundation protocol for data transmission on Internet. part of TCP/IP protocol
B) Simple Mail Transfer Protocol (SMTP), Internet Message Access Protocol (IMAP) - Protocls for email services
C) In a packet-switched network, information grouped into packets for transmission. TCP/IP is a packet-switched network protocol. Internet is world’s largest packet-switched network
2) Extensible Markup Language (XML) - Protocol for tagging documents for use on internet
A) Extensible Business Reporting Language (XBRL) - XML based protocol for encoding and tagging business information. Extnsible means users can create taxonomies for specific environments.
3) other protocols - Hypertext Markup Language (HTML) - core language for web pages. Basic building block prtotocol for constructing web pages
File Transfer Protocol (FTP) - Used for file transfer applcications
Instant Message (IM) - Protocol for instant messaging
Intranets and Extranets
Intranets and extranets – Intranets and extranets are private (e.g. limited access) networks built using Internet protocols. Therefore, users can access network resources through their web browser rather than a proprietary interface. This substantially reduces training time for users and system development time for programmers. Thus, intranets and extranets are rapidly replacing traditional proprietary LANs and WANs:
1.
Intranets – Available only to members of the organization (business, school, association); intranets are often used to connect geographically separate LANs within a company.
2.
Extranets – Intranets that are opened up to permit associates (company suppliers, customers, business partners, etc.) to access data that is relevant to them.
