1.4 Common Types of Networks
Extranet
An organization may use an extranet to provide secure and safe access to individuals who work for a different organization but require access to the organization's data. Here are some examples of extranets:
Which network infrastructure might an organization use to provide secure and safe access to individuals who work for a different organization but require access to the organization's data? - Extranet - Intranet - LAN - WAN
- Extranet
1) Which network infrastructure provides access to users and end devices in a small geographical area, which is typically a network in a department in an enterprise, a home, or small business? - Extranet - Intranet - LAN - WAN
- LAN
Which network infrastructure provides access to other networks over a large geographical area, which is often owned and managed by a telecommunications service provider? - Extranet - Intranet - LAN - WAN
- WAN
Local Area Network (LAN)
A LAN is a network infrastructure that spans a small geographical area. LANs have specific characteristics: - LANs interconnect end devices in a limited area such as a home, school, office building, or campus. - A LAN is usually administered by a single organization or individual. Administrative control is enforced at the network level and governs the security and access control policies. - LANs provide high-speed bandwidth to internal end devices and intermediary devices, as shown in the figure.
Wide Area Network (WAN)
A WAN is a network infrastructure that spans a wide geographical area. WANs are typically managed by service providers (SPs) or Internet Service Providers (ISPs). WANs have specific characteristics: - WANs interconnect LANs over wide geographical areas such as between cities, states, provinces, countries, or continents. - WANs are usually administered by multiple service providers. - WANs typically provide slower speed links between LANs.
Intranet
Intranet is a term often used to refer to a private connection of LANs and WANs that belongs to an organization. An intranet is designed to be accessible only by the organization's members, employees, or others with authorization.
The Internet
The internet is a worldwide collection of interconnected networks (internetworks, or internet for short). The figure shows one way to view the internet as a collection of interconnected LANs and WANs. Some of the LAN examples are connected to each other through a WAN connection. WANs are then connected to each other. The red WAN connection lines represent all the varieties of ways we connect networks. WANs can connect through copper wires, fiber-optic cables, and wireless transmissions (not shown). The internet is not owned by any individual or group. Ensuring effective communication across this diverse infrastructure requires the application of consistent and commonly recognized technologies and standards as well as the cooperation of many network administration agencies. There are organizations that were developed to help maintain the structure and standardization of internet protocols and processes. These organizations include the Internet Engineering Task Force (IETF), Internet Corporation for Assigned Names and Numbers (ICANN), and the Internet Architecture Board (IAB), plus many others.
