Home » Author Archives: Kent Tong

Author Archives: Kent Tong

Concepts of SNMP (including v3)

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SNMP Purpose. SNMP is a protocol for getting the status (e.g., CPU load, free memory, network load) of computing devices such as routers, switches and even servers. Object descriptor, managed object. The client can provide a globally unique names such as cpmCPUTotal5secRev (the average CPU load of a Cisco device for the past 5 seconds) to indicate the information that it ...

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Basic concepts of OpenLDAP

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LDAP LDAP is just a type of database specialized for look ups. Reads are fast while writes are supported but relatively slow. That’s why LDAP is commonly used to store centralized user accounts. In LDAP, data is stored nodes (much like a record in a relational DB). Each node has some named attributes. For example, a node representing a user ...

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Basic IPv6 concepts

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Basic concept IPv6 is a completely separate protocol from IPv4! It means that the configuration and operation of IPv6 have nothing to do with those of IPv4 at all. They will run independently just like IPv4 and IPX or AppleTalk. Format of IPv6 address An IPv6 address contains 128 bits and is written in 8 groups of 16 bits like ...

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