SMTP is a protocol that provides reliable and effective email transmission. SMTP is a mail service built on the FTP file transfer service. 

Today I will talk about Cisco CGMP and RGMP. CGMP is used to limit multicast traffic on Layer 2 networks. Because the switch cannot view Layer 3 data packets, and cannot distinguish between IGMP packets.

I saw that there are various protocols written in some message format encyclopedias, but there is no protocol for these dialogues. Is it because they belong to different levels? However, there are also some application layer protocols such as SNMP. Is it the difference between routing protocols?

Of course, the home network, enterprise network, and data center are connected to the operator's access network through optical fiber. 

Although automation is changing the role of network engineers, the skills of many network engineers cannot be replaced by automation. Having good communication skills and being able to apply modern network knowledge to the old network architecture is the key to the job.

For monitoring projects, many causes of failures are related to improper IP address settings, such as IP conflicts, or there are several monitoring images that are not displayed, etc

The maximum transmission unit is used to notify the other party of the maximum size of the data service unit that can be accepted, and to indicate the size of the payload that the sender can accept.

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The most important skills of network engineers are solid foundation and very open thinking, solid micro knowledge and outstanding macro capabilities.