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Define the length of time before an IKE Security Association automatically renegotiates in this field.

It may range from 300 seconds (five minutes) to 86,400 seconds (one day).

In NetWare, the SAP broadcasts information about available services on the network that other

network devices can listen to. A server sends out SAP messages every 60 seconds. A server also

sends out SAP messages to inform other devices that it is closing down. Workstations use SAP to

find services they need on the network.

A UNIX program that gathers information on networks and stores it in databases. It is helpful in

finding security flaws such as incorrect settings, software bugs and poor policy decisions.

It shows network services that are running, the different types of hardware and software on the

network, and other information.

Simple Certificate Enrollment Protocol (SCEP) is a TCP-based certificate enrollment protocol

that was developed by VeriSign and Cisco.

A Symmetrical Digital Subscriber Line is a symmetrical, bi-directional DSL service that operates

on one twisted-pair wire. It can provide data rates up to the T1 rate of 1.544 Mbits/sec, and it

operates above the voice frequency, so voice and data can be carried on the same wire.

Secure Gateway IP Address is the WAN IP address of the remote IPSec router.

A self-signed certificate is one that you generate on a device. The device acts as the certification

authority and signs the certificate itself.

A computer, or a software package, that provides a specific kind of service to client software

running on other computers.

Secure Hash Algorithm HMAC-SHA-1 (RFC 2404) is a hash algorithm that is used to authenticate

packet data. It produces a 160-bit message digest. See also Hash and MD5.

A SHA1 fingerprint is a certificate's message digest that was calculated using the SHA1 algorithm.

See also message digest.

Looking over someone's shoulder to see the numbers they dial on a phone, or the information they

enter into a computer.

The SMT is a menu-based interface that you use to configure your device.

SNMP is a popular management protocol defined by the Internet community for TCP/IP networks.

It is a communication protocol for collecting information from devices on the network.

Passively watching a network for information that could be used to a hacker's advantage,

such as passwords. Usually done while Camping Out.

Signal-to-Noise Ratio (SNR) is the ratio of the amplitude of the desired (DSL) signal to the amplitude

of noise signals at a given point in time. The higher the SNR number, the better the line quality.

A protocol that handles TCP traffic through proxy servers.

Unwanted e-mail, usually in the form of advertisements.

The spanning-tree algorithm calculates the best loop-free path throughout a switched network.

An SPI is used to distinguish different SAs terminating at the same destination and using the same

IPSec protocol. This data allows for the multiplexing of SAs to a single gateway. The SPI

(Security Parameter Index) along with a destination IP address uniquely identify a

particular Security Association (SA).

In telephony, a splitter, sometimes called a "plain old telephone service splitter" is a device that

divides a telephone signal into two or more signals, each carrying a selected frequency range, and

can also reassemble signals from multiple signal sources into a single signal

To forge something, such as an IP address. IP spoofing is a common way for hackers to hide their location and identity

Strict Priority Queuing (SPQ) services queues based on priority only. As traffic comes into the switch,

traffic on the highest priority queue is transmitted first. When that queue empties, traffic on the next

highest-priority queue is transmitted until that queue empties, and so on. If higher priority queues never empty,

then traffic on lower priority queues never gets sent. See also Queuing Algorithms.

SSH is a secure communication protocol that combines authentication and data encryption to provide

secure encrypted communication between two hosts over an unsecured network.

Technology that allows you to send information that only the server can read. SSL allows servers and

browsers to encrypt data as they communicate with each other. This makes it very difficult for third

parties to understand the communications.

See account generator printer.

A static MAC address entry is an address that you manually enter into the MAC address-learning table.

Static MAC addresses do not age out. This may reduce unicast flooding. The devices with MAC

addresses on this list cannot receive traffic on another port on the device.

Static routes tell routing information that a networking device cannot learn automatically through

other means. The need for static routing can arise in cases where RIP is disabled on the LAN

or a remote network is beyond the one that is directly connected to a remote node.

STP cable consists of copper-core wires surrounded by an insulator. Two wires are twisted

together to form a pair; the pair form a balanced circuit. The twisting prevents interference

problems, STP provides protection against external crosstalk.

STP detects and breaks network loops and provides backup links between switches, bridges

or routers. It allows a device to interact with other STP-aware devices in your network to ensure

that only one path exists between any two stations on the network.

A cable that wires a pin to its equivalent pin. This cable connects two dissimilar devices, for example,

a data terminal equipment (DTE) device and a data communications equipment (DCE) device.

A straight-through Ethernet cable is the most commonly used Ethernet cable.

Your system's SUA feature allows multiple user Internet access for the cost of a single ISP account.

The subnet mask specifies the network number portion of an IP address. Your device will compute the

subnet mask automatically based on the IP Address that you entered. You do not need to change the

computer subnet mask unless you are instructed to do so.

With subnetting, the class arrangement of an IP address is ignored. For example, a class C address no

longer has to have 24 bits of network number and 8 bits of host ID. With subnetting, some of the

host ID bits are converted into network number bits.

A layer-2 network device that selects a path or circuit to send a data packet through.

An abbreviated form of System Log. Using the UNIX syslog facility, a device records (logs) phone

calls or creates a CDR (Call Detail Record). Syslog is an administrative tool that assists in accounting

and is configurable via the SMT.