Cisco CCNA Security (640-553 IINS) Certification Exam

CCNA Security Glossary PDF Version

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CCNA 640-553 GLOSSARY

http://rapidshare.com/files/141669711/640-553_CCNA_Security_Glossary.pdf.html

CCNA Security Glossary 3

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Public Key Infrastructure (PKI) Taken as a whole, a set of technical, organizational, and legal components that combine to establish a system that enables large-scale use of public key cryptography. Via a PKI, an organization can provide authenticity, confidentiality, integrity, and nonrepudiation services.

public switched telephone network (PSTN) The North American public telephone network.

rainbow table A precomputed table of all possible combinations of characters and the hashes they create. If an attacker were to discover the contents of a password file, such as the SAM file in Windows, he could load the hashes stored in the SAM into a rainbow table. The rainbow table then displays the input required to generate that hash. This is often referred to as a time-versus-space trade-off attack. An attacker does not have to spend time trying every possible combination until
he finds a match. However, he must sacrifice more than 50 GB of hard drive space to store these tables, or have access to an online rainbow table.

Real-time Transport Protocol (RTP) Carries the voice payload in VoIP streams. Interestingly, although RTP is a Layer 4 protocol, it is encapsulated inside UDP (also a Layer 4 protocol). The UDP port numbers used can vary by vendor, but in Cisco environments, RTP typically uses even UDP ports in the range 16,384 to 32,767.
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CCNA Security Glossary 2

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denial of service (DoS)

denial of service (DoS) A class of attack in which the attacker seeks to make a given resource unavailable to legitimate users by overwhelming the resource with requests for service that appear legitimate. The resource, such as a server, seeks to handle all requests but ultimately fails. It either becomes unavailable for legitimate purposes or struggles to such an extent that it cannot respond
to legitimate requests in a timely manner.

detective control Can detect when access to data or a system occurs.

deterrent control Attempts to prevent a security incident by influencing a potential attacker not
to launch an attack.

DHCP snooping The Dynamic Host Configuration Protocol snooping feature on Cisco Catalyst switches can be used to combat a DHCP server spoofing attack. With this solution, Cisco Catalyst switch ports are configured in either a trusted or untrusted state. If a port is trusted, it is allowed to receive DHCP responses. If a port is untrusted, it is not allowed to receive DHCP responses. If a DHCP response attempts to enter an untrusted port, the port is disabled. › Continue reading

CCNA Security Glossary 1

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access control list (ACL) ACLs can provide basic traffic-filtering capabilities on Cisco routers. ACLs can be configured for all routed network protocols to filter packets as they pass through a router or security appliance. An ACL may be used for packet filtering (a type of firewall), as well as for selecting types of traffic to be analyzed, forwarded, or influenced in some manner.

accounting Tracking users’ consumption of network resources. This information may be used for management purposes, planning, billing, or other purposes. Typical information that is gathered includes the user’s name, the nature of the service delivered, when the service began, and when it concluded. › Continue reading

Download New pass4sure p4s Cisco CCSP Exams

Tuesday, August 26th, 2008 | Exam Braindumps | No Comments

CCSP Certification Exams Boot camp & Braindump
It is well known that Cisco CCSP certification training is experiencing a great demand in IT industry area. In recent years, the CCSP certification has become a global standard for many successful IT companies. › Continue reading