What is permanent switching for packet switching?

Question

Computer networks

It is written that constant switching (as well as dynamic switching) can be in circuit switching and packet switching.

But I do not quite understand what constant switching means for packet switching. In packet switching, silence is not transmitted, only frames are transmitted.

That is, for example, I made a request to the site - the site loaded. Further, when I just read something, no data is loaded, there is no switching. How to understand constant switching here, for example?

Or does constant switching simply imply a permanently open communication channel? What does it mean?

Answer 1

Permanent switching is a set of measures - in other words, it is the establishment of a connection from outside (by the administrator) that limits your connection time with another host (it can set the time, volume, traffic speed).
Example: If you remember earlier, there were conversation booths between cities at the post office, where you spoke for some clearly allotted time.
Dynamic goes on the initiative of one user from host A to another host B, in the amount that is needed (about the possibility of those) to the initiator.
The connection here is free with other network members, unless other restrictions are imposed on the network (a host in another vlan, for example).
Example: Ordinary office network, you decide to connect remotely to a colleague's computer.

Answer 2

I will quote INTUIT.RU: Fundamentals of data networks .

Permanent and dynamic switching
Both packet-switched and circuit-switched networks can be divided into two classes:

• networks with dynamic switching;
  
• networks with permanent switching.
  

In dynamic switching networks :

• it is allowed to establish a connection at the initiative of the network user;
  
• switching is performed only for the duration of the communication session, and then (at the initiative of one of the users) is broken;
  
• in general, a network user can connect to any other network user;
  
• the connection time between a pair of users during dynamic switching ranges from several seconds to several hours and ends after certain work has been completed - transferring a file, viewing a page of text or an image, etc.
  

Examples of networks that support dynamic switching are public telephone networks, local area networks, TCP/IP networks.
Network operating in constant switching mode :

• allows a pair of users to order a connection for a long period of time;
  
• the connection is established not by users, but by the personnel serving the network;
  
• the period for which permanent switching is established is usually several months;
  
• permanent switching mode in circuit-switched networks is often referred to as dedicated or leased circuit service;
  
• when a permanent connection through a network of switches is established using automatic procedures initiated by service personnel, it is often referred to as a semi-permanent (semi-permanent) connection, in contrast to the manual configuration mode of each switch.