What type of network could be described as an internal internet?0.5 MarksPerimeter networkExtranetDMZIntranet

Step 1: Break Down the Problem

To answer the question, we need to define what is meant by an "internal internet" and analyze the options provided: Perimeter network, Extranet, DMZ, and Intranet.

Step 2: Relevant Concepts

1. Intranet: A private network accessible only to an organization's staff, often referred to as an internal website.
2. Extranet: A controlled private network allowing access to partners, vendors, and other businesses.
3. DMZ (Demilitarized Zone): A physical or logical subnetwork that contains and exposes an organization's external-facing services to an untrusted network, like the internet.
4. Perimeter Network: Often used interchangeably with DMZ, it serves a similar purpose of providing an additional layer of security.

Step 3: Analysis and Detail

• An Intranet serves as the internal communication network of an organization, akin to an internal version of the internet.
• Extranets facilitate communication with external stakeholders and include some level of access to external users, hence they cannot be classified strictly as an internal internet.
• DMZ relates to the security of web services but does not describe a network meant for internal communication.
• Perimeter networks offer security layers and are not primarily for internal usage.

Step 4: Verify and Summarize

Given the definitions and purposes of each network type, the clear candidate for an "internal internet" is Intranet.

Final Answer

Intranet is the type of network that could be described as an internal internet.