How is the editor different from a beta reader, and vice versa
Each writer is waiting for feedback on his works. And it’s wonderful if the responses appear. And if not? If the readers either weren’t found, or they were silent, but…

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Retargeting What is it? And how to use it to increase the likelihood of a purchase?
Retargeting What is it? And how to use it to return visitors to the site? It is human nature to choose. In this regard, not every user who visits the…

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Local Area Networks and the Internet
When a local area network is connected to the global Internet, one of the PCs, called a server, becomes a kind of conductor and connects to the Internet using a…

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protocols that use checksum calculation

PPTP VPN

This protocol allows you to implement a secure point-to-point connection by creating a tunnel in an insecure network.

The work of PPTP is to implement PPP frames in IP packets for transferring them to any IP network, including the Internet. In addition, this technology can be used to create a tunnel between local networks.

A TCP connection is used to service the created PPTP tunnel.

Brief specification
The protocol specification was published in 1999 in RFC2637, but the IETF community has not ratified it.
Less secure than IPSec, PPTP establishes a PPP session using the GRE protocol. The 1723 TCP port is used to control and initiate the GRE connection. Redirecting PPTP to the firewall is difficult because the protocol requires two sessions to be established simultaneously. Continue reading

Anonymous proxies
A proxy server is the link between users and the Internet. Proxy server - a server that is constantly on the Web, transmitting all user computer requests to the network,…

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Self-creating a graphic logo - step by step instructions
In this informative post, I would like to consider all aspects of creating a company logo - the most important element of a modern identity / brand. The lesson will…

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How to write articles. To help copywriters
Today, more and more people are trying themselves in copywriting. This is both good and bad. Good - because, as they say, the more professional the party, the more interesting…

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The allowable marginal cost of the targeted action of the visitor on the site.
Website performance is measured not by the site’s position in the TOP, and not by the number of visitors, although most often site owners track and pay for these metrics.…

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