Today we will tell you about What is SNMP protocol in this blog and will try to explain its components, and security level as well, you read it completely, you will understand it easily. So let’s start:-
The full name of SNMP is Simple Network Management Protocol. It is also a network protocol and is used to manage the Internet World Wide Network.
This protocol is considered as the Internet-standard network protocol which monitors all the network devices in the IP network and collects and organizes the information (data) of all these devices.
The SNMP protocol is supported by most network devices such as hubs, switches, routers, bridges, servers, modems, and printers.
This protocol is a protocol that uses User Datagram Protocol (UDP) for its work and is a part of the TCP/IP protocol suite but it is not limited to TCP/IP.
SNMP was defined by the IETF (Internet Engineering Task Force).
It has got three versions so far:-
SNMPv3 This is its latest version, which is very secure when compared to SNMPv1 and SNMPv2, SNMPv3 is very secure. That’s why you always use SNMPv3.
How Does SNMP Work
If the network is discussed, there are a variety of activities throughout the day like file transfers, internet browsing, downloads, prints, etc.
So SNMP maintain the display in such a way to monitor network device activities, and store network-related information,
Such as packages, bytes and errors are transmitted and received by the network router and check the connection speed between the devices to do.
SNMP is primarily based on the server-client model. Where SNMP Server is called SNMP Server, it is the software installed on the computer. And with this, reports related to the agent database are accessed and monitored.
And SNMP client means network devices, such as switches, hubs, NAS servers, workstations, etc. And all this is called an agent.
There is a software utility available on the network agent device, which configures it done.
The job is to store the complete data of the device in the database, which is the MIB (the management information is called Aadhaar). By accessing this database after the manager, the network activity is monitored.
Its components are as follows:-
- SNMP manager
- SNMP agent
- Managed device
It is a computer system that monitors network traffic through an SNMP proxy, notifies these agents, records their responses, and monitors them.
It is a software program contained in a network element. Collects device information in real-time and transmits this information to the SNMP administrator. It also stores and retrieves information.
To manage the network, our networking device like a switch, router, hub, server, bridge, modem, etc. comes inside the managed device. It is also called a network element.
Management Information Database is a virtual information repository that stores management information.
SNMP Basic Operations Commands
Following are some of its common commands:-
- GET NEXT
- GET BULK
The operation is used to GET operation one or more values from the SNMP manager.
It is similar to the GET operation but GET NEXT is used to get the next values from the agent.
This is done by the manager to set the value of the managed device.
This command is used by the SNMP agent to send a validation message to the SNMP manager.
This command is used to retrieve large data.
This command is also similar to a TRAP, which is used by the SNMP agent to send validation messages to the SNMP manager.
SNMP Security Level
It defines the security algorithms on the SNMP packets. They are only used in SNMPV3.
These are the three types:-
- No Authentication, No Privacy
- Authentication, no privacy
- Authentication, privacy
No Authentication, No Privacy:-
It (No Authentication, No Privacy) uses a community string to authenticate the security level and it does not use encryption for privacy.
Authentication, no privacy:-
It uses HMAC and MD5 for one authentication level (Authentication, no privacy) and does not use encryption for privacy.
It uses Md5 or SHA with HMAC for security level (authentication, privacy) authentication and DES-56 algorithm for encryption.
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