computer network

SIT716 Computer Networks and Security
Pass Task 9.1P
Weeks 8-9: Telemetry and Operations
Part 1. Specific Questions – SNMP MIBs
IP (RFC4293) :
ipSystemStatsInNoRoutes OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of input IP datagrams discarded because no route
could be found to transmit them to their destination.
Discontinuities in the value of this counter can occur at
re-initialization of the management system, and at other
times as indicated by the value of
ipSystemStatsDiscontinuityTime."
::= { ipSystemStatsEntry 8 }
The number of input datagrams that were rejected because the IP address in their IP header destination field wasn't one that could be accepted by this organisation. This indicates that the destination address for the packet was not specified. This can aid in troubleshooting as well.
TCP (RFC4022) :
tcpActiveOpens OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times that TCP connections have made a direct
transition to the SYN-SENT state from the CLOSED state.
Discontinuities in the value of this counter are
indicated via discontinuities in the value of sysUpTime."
::= { tcp 5 }
The number of times a TCP connection has gone straight from the CLOSED state to the SYN-SENT state.
A client's establishment of a connection to a listening port is known as an active open. It employs connect() and socket().
UDP (RFC4113) :
udpNoPorts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of received UDP datagrams for which
there was no application at the destination port.
Discontinuities in the...