Cisco IPS 7.1 Installation Guide download pdf (Page 398)

Glossary

GL-20

Cisco Intrusion Prevention System Appliance Hardware Installation Guide for IPS 7.1

OL-24002-01

Serial Number. Part of the UDI. The SN is the serial number of your Cisco product.

SNAP

Subnetwork Access Protocol. Internet protocol that operates between a network entity in the

subnetwork and a network entity in the end system. SNAP specifies a standard method of encapsulating

IP datagrams and ARP messages on IEEE networks. The SNAP entity in the end system makes use of

the services of the subnetwork and performs three key functions: data transfer, connection

management, and QoS selection.

sniffing interface

See sensing interface.

SNMP

Simple Network Management Protocol. Network management protocol used almost exclusively in

TCP/IP networks. SNMP provides a means to monitor and control network devices, and to manage

configurations, statistics collection, performance, and security.

SNMP2

SNMP Version 2. Version 2 of the network management protocol. SNMP2 supports centralized and

distributed network management strategies, and includes improvements in the SMI, protocol

operations, management architecture, and security.

software bypass

Passes traffic through the IPS system without inspection.

source address

Address of a network device that is sending data.

SPAN

Switched Port Analyzer. Feature of the Catalyst 5000 switch that extends the monitoring abilities of

existing network analyzers into a switched Ethernet environment. SPAN mirrors the traffic at one

switched segment onto a predefined SPAN port. A network analyzer attached to the SPAN port can

monitor traffic from any other Catalyst switched port.

spanning tree

Loop-free subset of a network topology.

SQL

Structured Query Language. International standard language for defining and accessing relational

databases.

SRAM

Type of RAM that retains its contents for as long as power is supplied. SRAM does not require constant

refreshing, like DRAM.

SSH

Secure Shell. A utility that uses strong authentication and secure communications to log in to another

computer over a network.

SSL

Secure Socket Layer. Encryption technology for the Internet used to provide secure transactions, such

as the transmission of credit card numbers for e-commerce.

Stacheldraht

A DDoS tool that relies on the ICMP protocol.

State engine

Stateful searches of HTTP strings.

Statistics Processor

A processor in the IPS. Keeps track of system statistics such as packet counts and packet arrival rates.

Stream Reassembly

Processor

A processor in the IPS. Reorders TCP streams to ensure the arrival order of the packets at the various

stream-based inspectors. It is also responsible for normalization of the TCP stream. The normalizer

engine lets you enable or disable alert and deny actions.

String engine

A signature engine that provides regular expression-based pattern inspection and alert functionality for

multiple transport protocols, including TCP, UDP, and ICMP.

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