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the free encyclopedia that anyone can edit. "The Day Before the Revolution" is a science fiction short story by American writer Ursula K. Le Guin (pictured). First published in Galaxy in August 1974, it was republished in Le Guin's The Wind's Twelve Quarters (1975). Set in her fictional Hainish universe, the story has strong connections to her ...
Netflix is an American subscription video on-demand over-the-top streaming service. The service primarily distributes original and acquired films and television shows from various genres, and it is available internationally in multiple languages.[6] Launched on January 16, 2007, nearly a decade after Netflix, Inc. began its pioneering DVD‑by ...
This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database.[1] IANA also oversees the approval process for new proposed ...
List of social networking services. A social networking service is an online platform that people use to build social networks or social relationships with other people who share similar personal or career interests, activities, backgrounds or real-life connections. This is a list of notable active social network services, excluding online ...
- Types
- Security Mechanisms
- Routing
- User-Visible PPVPN Services
- Trusted Delivery Networks
- VPNs in Mobile Environments
- Networking Limitations
- Further Reading
Virtual private networks may be classified into several categories: Remote access 1. A host-to-network configuration is analogous to connecting a computer to a local area network. This type provides access to an enterprise[jargon] network, such as an intranet. This may be employed for remote workers, or to enable a mobile worker to access necessary...
VPNs cannot make online connections completely anonymous, but they can increase privacy and security by encrypting all communication between remote locations over the open Internet. To prevent disclosure of private information or data sniffing, VPNs typically allow only authenticated remote access using[clarification needed] tunneling protocols and...
Tunneling protocols can operate in a point-to-point network topology however, this would theoretically not be considered a VPN because a VPN by definition is expected to support arbitrary and changing sets of network nodes. But since most router implementations support a virtual, software-defined tunnel interface, customer-provisioned VPNs often ar...
OSI Layer 3 PPVPN architectures
This section discusses the main architectures for PPVPNs, one where the PE disambiguates duplicate addresses in a single routing instance, and the other, virtual router, in which the PE contains a virtual router instance per VPN. The former approach, and its variants, have gained the most attention. One of the challenges of PPVPNs involves different customers using the same address space, especially the IPv4 private address space.The provider must be able to disambiguate overlapping addresses...
Unencrypted tunnels
Some virtual networks use tunneling protocols without encryption to protect the privacy of data. While VPNs often provide security, an unencrypted overlay network does not fit within the secure or trusted categorization. For example, a tunnel set up between two hosts with Generic Routing Encapsulation(GRE) is a virtual private network but is neither secure nor trusted. Native plaintext tunneling protocols include Layer 2 Tunneling Protocol (L2TP) when it is set up without IPsec and Point-to-P...
Trusted VPNs do not use cryptographic tunneling; instead, they rely on the security of a single provider's network to protect the traffic. 1. Multiprotocol Label Switching(MPLS) often overlays VPNs, often with quality-of-service control over a trusted delivery network. 2. L2TP which is a standards-based replacement, and a compromise taking the good...
Mobile virtual private networks are used in settings where an endpoint of the VPN is not fixed to a single IP address, but instead roams across various networks such as data networks from cellular carriers or between multiple Wi-Fi access points without dropping the secure VPN session or losing application sessions. Mobile VPNs are widely used in p...
A limitation of traditional VPNs is that they are point-to-point connections and do not tend to support broadcast domains; therefore, communication, software, and networking, which are based on layer 2 and broadcast packets, such as NetBIOS used in Windows networking, may not be fully supported as on a local area network. Variants on VPN such as Vi...
Kelly, Sean (August 2001). "Necessity is the mother of VPN invention". Communication News: 26–28. ISSN 0010-3632. Archived from the originalon 17 December 2001.
Amazon.com, Inc.,[1] doing business as Amazon (/ˈæməzɒn/, AM-ə-zon; UK also /ˈæməzən/, AM-ə-zən), is an American multinational technology company, engaged in e-commerce, cloud computing, online advertising, digital streaming, and artificial intelligence.[5] It is considered one of the Big Five American technology companies; the ...
Definition. The dark web has often been confused with the deep web, the parts of the web not indexed (searchable) by search engines. The term dark web first emerged in 2009; however, it is unknown when the actual dark web first emerged. [11] Many internet users only use the surface web, data that can be accessed by a typical web browser. [12]
