Cisco OL-4015-08 User Manual page 663

NHRP
non-repudiation
service
NTP
O
Oakley
OFB
outside global
outside local
OSPF
OL-4015-08
Next Hop Resolution protocol. A client and server protocol used in
networks, in which the hub router is the server and the spokes are the clients. The
hub maintains an NHRP database of the public interface addresses of the each
spoke. Each spoke registers its real address when it boots and queries the NHRP
database for real addresses of the destination spokes in order to build direct
tunnels to them.
A third-party security service that stores evidence for later, possible retrieval,
regarding the origin and destination of all data included in a communication —
without storing the actual data. This evidence can be used to safeguard all
participants in that communication against false denials by any participant of
having sent information, as well as false denials by any participant of having
received information.
Network Time Protocol. A protocol to synchronize the system clocks on network
devices. NTP is a UDP
A protocol for establishing secret keys for use by authenticated parties, based on
Diffie-Hellman and designed to be a compatible component of ISAKMP.
output feedback. An IPSec function that feeds encrypted output (generally, but
not necessarily, DES-encrypted) back into the original input. Plaintext is
encrypted directly with the symmetric key. This produces a pseudo-random
number stream.
The IP address assigned to a host on the outside network by the host's owner. The
address was allocated from globally routable address or network space.
The IP address of an outside host as it appears to the inside network. Not
necessarily a legitimate address, it was allocated from an address space routable
on the inside.
Open Shortest Path First. Link-state, hierarchical IGP routing algorithm
proposed as a successor to RIP in the Internet community. OSPF features include
least-cost routing, multipath routing, and load balancing.
Cisco Router and Security Device Manager Version 2.2 User's Guide
protocol.
Glossary
DMVPN
GL-21