Similar to 401 Unauthorized, but it indicates that the client needs to authenticate itself in order to use a proxy.
The proxy MUST send a Proxy-Authenticate header field containing a challenge applicable to that proxy for the target resource. The client MAY repeat the request with a new or replaced Proxy-Authorization header field.
The server has an internal configuration error: the chosen variant resource is configured to engage in transparent content negotiation itself, and is therefore not a proper end point in the negotiation process.
The second principle of the CIA Triad is Integrity. Integrity is the concept of protecting the reliability and correctness of data. This concept revolves around making sure all data is protected from unauthorized alterations. Protection Examples: Making sure that data is correct, unaltered, and preserved includes implementing various countermeasures such as strict access control, rigorous…
Services that are not bound to a certain layer but may have an impact on multiple layers are known as cross-layer functions. All of the levels are involved in some orthogonal issues, such management and security. The confidentiality, integrity, and availability of the sent data are improved by these services. In reality, cross-layer functions are…
The target resource has more than one representation, each with its own more specific identifier, and information about the alternatives is being provided so that the user (or user agent) can select a preferred representation by redirecting its request to one or more of those identifiers. In other words, the server desires that the user…
An asset is anything in an organization that should be protected. Assets can be very broad and some examples include: Laptops Servers Databases Hard drives Company products Facilities Processes Furniture Employees Assets can vary from organization to organization. In theory, anything an organization classifies as important enough to protect, can be labeled as an asset…
The third principle of the CIA Triad is Availability. Availability is the concept of allowing authorized users timely and uninterrupted access to objects. Protection Examples: Numerous countermeasures exists that can ensure availability. Some examples include designing intermediary delivery systems properly, using access controls, monitoring performance and network traffic, using firewalls and routers, implementing redundancy such…