Cisco CCNA Security 640-553 IINS Tutorials Part-4

Checksum A mathematical computation used to verify that the contents of a message have not
been altered.

Ciphertext The representation of plain text in an unreadable form.

Cisco Discovery Protocol (CDP) A Layer 2 protocol that permits adjacent Cisco devices to
learn information about one another (for example, protocol and platform information).

Cisco Security Agent (CSA) A host-based IPS (HIPS) solution. The CSA software can be
installed on selected host systems and optionally report suspicious activity to a centralized management server.

Cisco Security Device Manager (SDM) Provides a graphical user interface (GUI) for
configuring a wide variety of features on an IOS router.

Cisco Security Manager An application that can be used to configure security features on a wide variety of Cisco security products.

Cisco Security MARS The Cisco Security Monitoring, Analysis and Response System. The
MARS product offers security monitoring for security devices and applications. In addition to Cisco devices and applications, Cisco Security MARS can monitor many third-party devices and applications.

Cisco Self-Defending Network The Cisco vision for using a network to recognize threats
and then prevent and adapt to them.

class map A way of identifying a set of packets based on their contents using “match” conditions. Classes generally are defined so that you can apply an action to the identified traffic that reflects a policy. The class itself is designated via the class map. Class maps are created using the class-map command. After it is created, the class map is used to match packets to a specified class.

Cold site A cold site offers an alternative site where business operations can be conducted, unlike a hot or warm site. However, a cold site typically does not contain redundant computing equipment such as servers and routers. As a result, the data network would need to be rebuilt from scratch, which might require weeks. Therefore, although a cold site is less expensive initially, as compared to hot or warm sites, a cold site could have more long-term consequences. In fact, the financial consequences could be far greater than the initial cost savings.

Collision When two separate messages have the same message digest. A hash “collision” or hash “clash” happens when two distinct inputs entered into a hash function produce identical outputs. Each hash function has the potential for collisions. However, if you are working with a well-designed hash function, collisions should occur less frequently. In terms of hash functions, collisions inhibit the distinguishing of data, making records more costly to find in hash tables
and data processing.