| O
- od command
, 
- Open Systems Interconnect (OSI) Reference Model
, , 
- org_dir object, and DHCP
, 
- other stateful configuration flag
- router advertisement
, 
P
- packets
- belonging to the same flow
,  - checking flow
,  - data encapsulation
, ,  - description
,  - displaying contents
,  - dropped or lost
, ,  - flow
,  - fragmentation
,  - header
- IP header
,  - TCP protocol functions
, 
- IP protocol functions
,  - life cycle
, ,  - application layer
,  - data-link layer
, ,  - Internet layer
,  - physical network layer
, ,  - receiving host process
, ,  - transport layer
, , 
- protecting with IKE
,  - protecting with IPsec
,  - transfer
- router
, ,  - TCP/IP stack
, , 
- transfer log
,  - UDP
, 
- parameter discovery
- IPv6
, 
- payload length field
- IPv6 header
, 
- physical interface, multipathing
, 
- physical interface failures, detecting
, 
- physical interface group, multipathing
, 
- physical interface group name, multipathing
, 
- physical interface repairs, detecting
, 
- physical layer (OSI)
, 
- physical network layer (TCP/IP)
, , , 
- ping command
, ,  - -A option
,  - -a option
, ,  - description
,  - IPv6
, ,  - running
, ,  - syntax
, , 
- pntadm command
- description
,  - examples
, 
- Pool label
, , , , , 
- Pool section
- configuring
,  - labels and values
,  - Mobile IP configuration file
,  - modifying
, 
- ports
- TCP and UDP port numbers
, 
- PPP links
- forcing machine to be a router
,  - troubleshooting
- packet flow
, 
- prefix discovery
- IPv6
, 
- prefix format allocations
- IPv6 addresses
, 
- prefixes
- router advertisement
, ,  - autonomous address-configuration flag
, , 
- PrefixFlags label
, , , 
- presentation layer (OSI)
, 
- private addresses
- Mobile IP
, 
- probing targets
- in.mpathd daemon
, 
- protection mechanisms
- IPsec
, 
- protocol layers
- OSI Reference Model
, ,  - packet life cycle
, ,  - TCP/IP protocol architecture model
, ,  - application layer
, , ,  - data-link layer
, ,  - Internet layer
, ,  - physical network layer
, ,  - transport layer
, , 
- protocol statistics display
, 
- protocols database
- corresponding name service files
,  - overview
, 
- proxy advertisements
, 
- PTR records, DNS
, 
- publickeys database
, 
Q
- -q option
- in.routed daemon
, 
- quality-of-service
- IPv6
,  - IPv6 flow label field
, 
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