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Glossary
GL-13
Cisco ASA 5500 Series Configuration Guide using ASDM
node
Devices such as routers and printers that would not normally be called hosts. See also host, network.
nonvolatile storage,
memory
Storage or memory that, unlike RAM, retains its contents without power. Data in a nonvolatile storage
device survives a power-off, power-on cycle.
NSAPI
network service access point identifier. One of two components of a GTP tunnel ID, the other
component being the IMSI. See also IMSI.
NSSA
not-so-stubby-area. An OSPF feature described by RFC 1587. NSSA was first introduced in Cisco
IOS software release 11.2. It is a nonproprietary extension of the existing stub area feature that allows
the injection of external routes in a limited fashion into the stub area.
NTLM
NT Lan Manager. A Microsoft Windows challenge-response authentication method.
NTP
Network Time Protocol.
O
Oakley
A key exchange protocol that defines how to acquire authenticated keying material. The basic
mechanism for Oakley is the Diffie-Hellman key exchange algorithm. Oakley is defined in RFC 2412.
object grouping
Simplifies access control by letting you apply access control statements to groups of network objects,
such as protocol, services, hosts, and networks.
OSPF
Open Shortest Path First. OSPF is a routing protocol for IP networks. OSPF is a routing protocol
widely deployed in large networks because of its efficient use of network bandwidth and its rapid
convergence after changes in topology. The ASA supports OSPF.
OU
Organizational Unit. An X.500 directory attribute.
outbound
Refers to traffic whose destination is on an interface with lower security than the source interface.
outbound ACL
An ACL applied to outbound traffic.
outside
The first interface, usually port 0, that connects to other untrusted networks outside the ASA; the
Internet. See also interface, interface name, outbound.
P
PAC
PPTP Access Concentrator. A device attached to one or more PSTN or ISDN lines capable of PPP
operation and of handling the PPTP protocol. The PAC needs to implement TCP/IP to pass traffic to
one or more PNSs. It may also tunnel non-IP protocols.
PAT
See Dynamic PAT, interface PAT, and Static PAT.
PDP
Packet Data Protocol.
Perfmon
The ASA feature that gathers and reports a wide variety of feature statistics, such as
connections/second, xlates/second, and so on.