What is this communication between redundant Zabbix servers?

[sho]

Could you please provide information on the communication between redundant Zabbix servers through this JSON?
Is this JSON used for exchanging System Information between Zabbix servers, as mentioned in the official documentation here: https://www.zabbix.com/documentation...atus_of_zabbix?
Furthermore, what is the purpose of this communication?

{
"request":"status.get",
"type":"full",
"sid":"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
}
{
"response": "success",
"data": {
"template.stats": [
{
"count": 279
}
],
"host.stats": [
{
"attributes": {
"proxyid": 0,
"status": 0
},
"count": 4
},
{
"attributes": {
"proxyid": 0,
"status": 1
},
"count": 0
}
],
"item.stats": [
{
"attributes": {
"proxyid": 0,
"status": 0,
"state": 0
},
"count": 113
},
{
"attributes": {
"proxyid": 0,
"status": 0,
"state": 1
},
"count": 11
},
{
"attributes": {
"proxyid": 0,
"status": 1
},
"count": 0
}
],
"trigger.stats": [
{
"attributes": {
"status": 0,
"value": 0
},
"count": 62
},
{
"attributes": {
"status": 0,
"value": 1
},
"count": 5
},
{
"attributes": {
"status": 1
},
"count": 0
}
],
"user.stats": [
{
"attributes": {
"status": 0
},
"count": 1
},
{
"attributes": {
"status": 1
},
"count": 1
}
],
"required.performance": [
{
"attributes": {
"proxyid": 0
},
"count": "1.6222222222222218"
}
]
}
}