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NEW QUESTION: 1
Several analysis methods can be employed by an IDS, each with its own strengths and weaknesses, and their applicability to any given situation should be carefully considered. There are two basic IDS analysis methods that exists. Which of the basic method is more prone to false positive?
A. Pattern Matching (also called signature analysis)
B. Network-based intrusion detection
C. Anomaly Detection
D. Host-based intrusion detection
Answer: C
Explanation:
Several analysis methods can be employed by an IDS, each with its own strengths and weaknesses, and their applicability to any given situation should be carefully considered.
There are two basic IDS analysis methods:
1.Pattern Matching (also called signature analysis), and
2.Anomaly detection
PATTERN MATCHING Some of the first IDS products used signature analysis as their detection method and simply looked for known characteristics of an attack (such as specific packet sequences or text in the data stream) to produce an alert if that pattern was detected. If a new or different attack vector is used, it will not match a known signature and, thus, slip past the IDS.
ANOMALY DETECTION Alternately, anomaly detection uses behavioral characteristics of a system's operation or network traffic to draw conclusions on whether the traffic represents a risk to the network or host. Anomalies may include but are not limited to:
Multiple failed log-on attempts Users logging in at strange hours Unexplained changes to system clocks Unusual error messages Unexplained system shutdowns or restarts Attempts to access restricted files
An anomaly-based IDS tends to produce more data because anything outside of the expected behavior is reported. Thus, they tend to report more false positives as expected behavior patterns change. An advantage to anomaly-based IDS is that, because they are based on behavior identification and not specific patterns of traffic, they are often able to detect new attacks that may be overlooked by a signature-based system. Often information from an anomaly-based IDS may be used to create a pattern for a signature-based IDS.
Host Based Intrusion Detection (HIDS) HIDS is the implementation of IDS capabilities at the host level. Its most significant difference from NIDS is that related processes are limited to the boundaries of a single-host system. However, this presents advantages in effectively detecting objectionable activities because the IDS process is running directly on the host system, not just observing it from the network. This offers unfettered access to system logs, processes, system information, and device information, and virtually eliminates limits associated with encryption. The level of integration represented by HIDS increases the level of visibility and control at the disposal of the HIDS application.
Network Based Intrustion Detection (NIDS) NIDS are usually incorporated into the network in a passive architecture, taking advantage of promiscuous mode access to the network. This means that it has visibility into every packet traversing the network segment. This allows the system to inspect packets and monitor sessions without impacting the network or the systems and applications utilizing the network.
Below you have other ways that instrusion detection can be performed:
Stateful Matching Intrusion Detection Stateful matching takes pattern matching to the next level. It scans for attack signatures in the context of a stream of traffic or overall system behavior rather than the individual packets or discrete system activities. For example, an attacker may use a tool that sends a volley of valid packets to a targeted system. Because all the packets are valid, pattern matching is nearly useless. However, the fact that a large volume of the packets was seen may, itself, represent a known or potential attack pattern. To evade attack, then, the attacker may send the packets from multiple locations with long wait periods between each transmission to either confuse the signature detection system or exhaust its session timing window. If the IDS service is tuned to record and analyze traffic over a long period of time it may detect such an attack. Because stateful matching also uses signatures, it too must be updated regularly and, thus, has some of the same limitations as pattern matching.
Statistical Anomaly-Based Intrusion Detection The statistical anomaly-based IDS analyzes event data by comparing it to typical, known, or predicted traffic profiles in an effort to find potential security breaches. It attempts to identify suspicious behavior by analyzing event data and identifying patterns of entries that deviate from a predicted norm. This type of detection method can be very effective and, at a very high level, begins to take on characteristics seen in IPS by establishing an expected baseline of behavior and acting on divergence from that baseline. However, there are some potential issues that may surface with a statistical IDS. Tuning the IDS can be challenging and, if not performed regularly, the system will be prone to false positives. Also, the definition of normal traffic can be open to interpretation and does not preclude an attacker from using normal activities to penetrate systems. Additionally, in a large, complex, dynamic corporate environment, it can be difficult, if not impossible, to clearly define "normal" traffic. The value of statistical analysis is that the system has the potential to detect previously unknown attacks. This is a huge departure from the limitation of matching previously known signatures. Therefore, when combined with signature matching technology, the statistical anomaly-based IDS can be very effective.
Protocol Anomaly-Based Intrusion Detection A protocol anomaly-based IDS identifies any unacceptable deviation from expected behavior based on known network protocols. For example, if the IDS is monitoring an HTTP session and the traffic contains attributes that deviate from established HTTP session protocol standards, the IDS may view that as a malicious attempt to manipulate the protocol, penetrate a firewall, or exploit a vulnerability. The value of this method is directly related to the use of well-known or well-defined protocols within an environment. If an organization primarily uses well-known protocols (such as HTTP, FTP, or telnet) this can be an effective method of performing intrusion detection. In the face of custom or nonstandard protocols, however, the system will have more difficulty or be completely unable to determine the proper packet format. Interestingly, this type of method is prone to the same challenges faced by signature-based IDSs. For example, specific protocol analysis modules may have to be added or customized to deal with unique or new protocols or unusual use of standard protocols. Nevertheless, having an IDS that is intimately aware of valid protocol use can be very powerful when an organization employs standard implementations of common protocols.
Traffic Anomaly-Based Intrusion Detection A traffic anomaly-based IDS identifies any unacceptable deviation from expected behavior based on actual traffic structure. When a session is established between systems, there is typically an expected pattern and behavior to the traffic transmitted in that session. That traffic can be compared to expected traffic conduct based on the understandings of traditional system interaction for that type of connection. Like the other types of anomaly-based IDS, traffic anomaly-based IDS relies on the ability to establish "normal" patterns of traffic and expected modes of behavior in systems, networks, and applications. In a highly dynamic environment it may be difficult, if not impossible, to clearly define these parameters.
Reference(s) used for this question:
Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition ((ISC)2 Press) (Kindle Locations 3664-3686). Auerbach Publications. Kindle Edition. and Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition ((ISC)2 Press) (Kindle Locations 3711-3734). Auerbach Publications. Kindle Edition. and Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition ((ISC)2 Press) (Kindle Locations 3694-3711). Auerbach Publications. Kindle Edition.

NEW QUESTION: 2
Your network contains an Active Directory domain named contoso.com. The domain contains a member server named Server1. Server1 runs Windows Server 2012 and has the DHCP Server server role installed.
You create two IPv4 scopes on Server1. The scopes are configured as shown in the following table.

The DHCP clients in Subnet1 can connect to the client computers in Subnet2 by using an IP address or a FQDN.
You discover that the DHCP clients in Subnet2 can connect to client computers in Subnet1 by using an IP address only.
You need to ensure that the DHCP clients in both subnets can connect to any other DHCP client by using a FQDN.
What should you add?
A. The 006 DNS Servers option to Subnet2
B. The 006 DNS Servers option to Subnet1
C. The 015 DNS Domain Name option to Subnet1
D. The 015 DNS Domain Name option to Subnet2
Answer: D
Explanation:
To enable DNS on the network, you need to configure DNS clients and servers.
When you configure DNS clients, you tell the clients the IP addresses of DNS servers on
the network. Usingthese addresses, clients can communicate with DNS servers anywhere
on the network, even if the servers areon different subnets.
When the network uses DHCP, you should configure DHCP to work with DNS. To do this,
you need to set theDHCP scope options 006 DNS Servers and 015 DNS Domain Name.
Issue: The DNS domain option (option 15) is not configured for one or more scopes. Impact: DHCP IPv4 clients will not be provided with a DNS domain and will not be able to resolve names.
Resolution: Configure a DNS domain option as a server or scope option using the DHCP MMC. Dynamic Host Configuration Protocol (DHCP) uses options to pass additional Internet Protocol (IP) settings toDHCP clients on a network. Examples of DHCP options include: The default gateway IP address, The Domain Name System (DNS) serverIP address The DNS domain name Membership in the Administrators or DHCP Administrators group is the minimum required to complete thisprocedure. To configure DNS server as a scope option or server option
1.Click Start, point to Administrative Tools and then click DHCP.
2.In the console tree, expand the App1icable DHCP server, expand IPv4, and then right-click Server Options
3.Click Configure Options, check 015 DNS Domain Name, type the App1icable domain name in String value:,and then click OK.

C:\Documents and Settings\usernwz1\Desktop\1.JPG
http://support.microsoft.com/kb/300684/en-us http://technet.microsoft.com/en-us/library/bb727109.aspx http://technet.microsoft.com/en-us/library/ee941136(v=ws.10).aspx http://technet.microsoft.com/en-us/library/dd572752%28v=office.13%29.aspx

NEW QUESTION: 3
Which statement about the DB2_BCKP_COMPRESSION registry variable is TRUE?
A. It only has effect when applied to a database in which all tables have been compressed.
B. It does not apply to table space backups.
C. It specifies the compression mode to use for DB2 backups.
D. If set, backup images created with the BACKUP command are automatically compressed.
Answer: D

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