SNMP trap An unsolicited message sent from the managed device to an SNMP manager. It can be used to notify the SNMP manager about a significant event that occurred on a managed device.
Snooping Broadly defines a class of attacks focused on compromising the confidentiality of data. In terms of SAN deployments, these attacks seek to give an attacker access to data that would otherwise be confidential.
Software Encryption Algorithm (SEAL) This kind of encryption uses a 160-bit encryption key. It offers the benefit of having less of an impact on the CPU compared to other software-based algorithms. It is an alternative to software-based DES, 3DES, and AES.
Spam over IP telephony (SPIT) VoIP spam. A SPIT attack on your Cisco IP Phone could, for example, make unsolicited messages periodically appear on the phone’s LCD screen or make the phone ring periodically.
Spoofing Imitating a given resource by alternative means. In network terms this might represent the spoofing of an IP address, where an attacker poses as the valid recipient at a given IP address to intercept traffic.
Standard access control list (ACL) Standard ACLs allow traffic to be permitted or denied from only specific IP addresses. With these ACLs, the packet’s destination and the ports involved are not taken into account.
Static firewall This first-generation firewall technology analyzes network traffic at the transport protocol layer. IP packets are examined to see if they match one of a set of rules defining which data flows are allowed. These rules specify whether communication is allowed based on information contained in the network and transport layer headers as well as the direction of the packet flow.
Storage-area network (SAN) In a SAN, storage devices are shared among all networked servers as peer resources. A SAN may be used to connect servers to storage, servers to each other, and storage to storage.
Stream cipher Uses smaller units of plain text than what are used with block ciphers. Typically they work with bits. Transformation of these smaller plain-text units also varies, depending on when during the encryption process they are encountered. One of the great benefits of stream ciphers as compared to block ciphers is that they are much faster. Generally they do not increase the message size because they can encrypt an arbitrary number of bits.
Supplicant A user device (such as a PC) that requests permission to access the network. This device must support the 802.1x standard. For example, a PC running the Microsoft Windows XP operating system supporting 802.1x could act as a supplicant.