What is means "Transport Type" "Number of Failures" "Last Failure Time" "Last Success Time" "Last Failure Status"

Question

when i running repladmin /showrepl    it show status
Showrepl_COLUMNS
Destination DC Site
Destination DC
Naming Context         is
means  ?
Source DC Site
Source DC
Transport Type         is
means  ?
Number of Failures     is
means  ?
Last Failure Time   
Last Success Time   
Last Failure Status    is
means  ?
Please explain to me .  Thnak you

Answer 1

Naming Context: NamingContext refers to the directory partitions that Active Directory comprises. Naming contexts include the three Read/Write naming contexts — domain, schema, and configuration — and the optional Read-only naming contexts
that are present on domain controllers that are global catalog servers. A naming context can also be an application directory partition. A naming context is specified as a distinguished name, which indicates its hierarchical relationship to the forest root
domain (for example, DC=MyDomain,DC=Microsoft,DC=Com). 
Source: http://technet.microsoft.com/en-us/library/cc757782(v=ws.10).aspx
Transport Type: See Transport Type section in this Microsoft article: http://technet.microsoft.com/en-us/library/cc755994(v=ws.10).aspx
As for the Number of Failures and the Last Failure Status
they are used to identify how many failures occurred since the last successful replication and the the status of the replication (If
Last Failure Status is equal to 0 then the replication is done successfully). Details here: http://support.microsoft.com/kb/2498185/en-us
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