SNMP

In multiple networking devices including routers , switches and other devices. If all the devices are trying to access the same routers and causes congestion then the SNMP comes in work . SNMP stands for simple network management protocal.

It involves :
1)SNMP management/manager : control agents

1. SNMP agent(routers, servers)
   3)information base : databases/ collection of manageed object

SNMP agents fetches information base and the device which is causing congestion is set or reset by which router is troubleshoot and router is restart . Like this SNMP helps is secured communication.

TLS

It stands for transport layer security. SSL can also be considerd as TLS .SSL is secured socket layer.
SSL has facilities like security , reliability, relative efficiency, extensibility, interoperability.
In SSL archietecture there are section like TCp, IP, SSl handshake, SSL alert protocal, HTTP , SSL Alert protocal.
Here SSL covers the actual data so that third person caan't access the data . For this SSL has advantages.
Initilaly handshake is done where the initial communication is created by authenticating the server to the client by which negotiation of algorithmn is done and then authentication of client to server is established . After the secure path is createdpublic key encruption is done . After this encrypted SSL connection is established.

Other parts of SSL like cipher spec and alert protocal sre used when they have specified condition.